994 results on '"Christopher R. Chapple"'
Search Results
2. The sensory system is a target for pharmaceutical therapy of overactive bladder
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Christopher R. Chapple
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Overactive bladder ,Sensory ,Lower urinary tract symptoms ,Pharmacotherapy ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
The concept that “the bladder is an unreliable witness” highlights the non-disease-specific nature of lower urinary tract symptoms (LUTS), which can arise regardless of anatomical differences between genders. This non-specificity has led to the broader classification of symptoms under LUTS, which include storage, voiding, and post-micturition symptoms. Overactive bladder (OAB) is characterised by urgency, often accompanied by frequency, nocturia, and, in some cases, incontinence. The symptoms of OAB do not always correlate with urodynamically proven idiopathic detrusor overactivity (IDO), indicating that afferent nerve activity plays a significant role. The complexity of bladder control involves a neural network spanning the brain, spinal cord, and peripheral ganglia. Current therapies, such as anticholinergics and beta-3 agonists, target both motor and sensory pathways, with emerging evidence suggesting that sensory modulation is crucial for effective treatment. Research using animal models has provided insights into the pharmacological mechanisms underlying bladder function, although these models have limitations in replicating human conditions. The importance of the sensory ‘web’ within the bladder’s mucosal and interstitial cell network is emphasised, as it significantly influences bladder compliance and sensory signalling. Recent advances, including the use of Onabotulinum toxin A and sacral neuromodulation, highlight the therapeutic potential of targeting sensory pathways in managing OAB symptoms.
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- 2024
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3. Robotic ureteral reconstruction for benign ureteral strictures: a systematic review of surgical techniques, complications and outcomes
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Kunlin Yang, Karl H. Pang, Shubo Fan, Xinfei Li, Nadir I. Osman, Christopher R. Chapple, Liqun Zhou, and Xuesong Li
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Ureteral stricture ,Robotic ,Laparoscopic ,Minimally invasive ,Reconstruction ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Abstract Introduction Robotic ureteral reconstruction (RUR) has been widely used to treat ureteral diseases. To summarize the surgical techniques, complications, and outcomes following RUR, as well as to compare data on RUR with open and laparoscopic ureteral reconstruction. Methods Our systematic review was registered on the PROSPERO (CRD42022309364) database. The PubMed, Cochrane and Embase databases were searched for publications in English on 06-Feb-2022. Randomised-controlled trials (RCTs) or non-randomised cohort studies with sample size ≥ 10 cases were included. Results A total of 23 studies were included involving 996 patients and 1004 ureters from 13 non-comparative, and 10 retrospective comparative studies. No RCT study of RUR was reported. The success rate was reported ≥ 90% in 15 studies. Four studies reported 85–90% success rate. Meta-analyses for comparative studies showed that RUR had significantly lower estimated blood loss (EBL) (P = 0.006) and shorter length of stay (LOS) (P
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- 2023
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4. Contemporary Outcomes of Surgery for Primary and Recurrent Genitourinary Fistulae in a Well-resourced Country
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Nadir I. Osman, Christopher J. Hillary, Aziz Gulamhusein, Alison Downey, Richard D. Inman, and Christopher R. Chapple
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Reconstructive urology ,Genitourinary fistula ,Urogenital fistula ,Vesicovaginal fistula ,Diseases of the genitourinary system. Urology ,RC870-923 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background: Urinary fistula (UF) is a global health problem but less common in well-resourced countries. Over the past decade there has been a trend toward managing UF in dedicated centres. Most of the evidence for surgical treatment is from individual case series, with few publications that involve high numbers. We describe the repair of recurrent and complex UF cases and outcomes in a tertiary referral setting. Objective: To describe UF aetiology, repair techniques, and outcomes. Design, setting, and participants: This is a retrospective study of a series of patients undergoing UF repair at a specialist unit. Outcome measurements and statistical analysis: We describe the aetiology, cure rate, complications, and postoperative urinary incontinence rates for the series of UF cases. Results and limitations: A consecutive series of 98 patients was identified, all of whom were tertiary referrals. Of these, 31 (31.6%) had at least one prior attempt at repair at another centre. The median age was 48 yr (interquartile range [IQR] 40–60.25). The median time from occurrence to repair was 12 mo (IQR 6–12). UF occurred most commonly following hysterectomy (48.0%), Caesarean section (9.2%), other gynaecological surgery (7.1%), and anti-incontinence surgery (7.1%). Complex fistulae (eg, repeat cases, radiation, ureteric involvement) comprised 41 of the cases (41.8%). Most patients with vesicovaginal fistula underwent repair via a transabdominal approach (70.4%). Tissue interposition was used in 96 cases (98%). There were no Clavien-Dindo grade >3 complications. Two patients (2%) had a persistent UF postoperatively. Two patients (2%) developed recurrence more than 2 yr after their initial repair, and both were successfully repaired at our centre. Twelve patients (12.3%) developed de novo overactive bladder, 22 (22.5%) developed stress urinary incontinence (13 had subsequent incontinence surgery), and two (2%) developed bladder pain (both had a subsequent cystectomy). Conclusions: Despite a high rate of recurrent and complex UF, successful lasting closure was achieved in 96% of our cases. A minority of patients developed other problems such as de novo overactive bladder and stress urinary incontinence that may require further treatment. Patient summary: Urinary fistula is an abnormal opening or connection in the urinary tract and is less common in well-resourced countries. As a consequence, management of this condition is more frequently undertaken at specialist units. Even patients with a complex fistula and those who have had multiple attempts at repair can experience a cure. Urinary leakage is a common complication after the operation but can be successfully managed with surgery.
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- 2021
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5. α1L-adrenoceptors mediate contraction of human erectile tissue
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Beverley J. Davis, Christopher R. Chapple, Donna J. Sellers, Alisdair L. Naylor, David Sillar, Alistair Campbell, and Russ Chess-Williams
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Therapeutics. Pharmacology ,RM1-950 - Abstract
α1-adrenoceptor antagonists can impact upon sexual function and have potential in the treatment of erectile dysfunction. Human erectile tissue contains predominantly α1A-adrenoceptors, and here we examined whether contractions of this tissue are mediated by the functional phenotype, the α1L-adrenoceptor. Functional experiments using subtype selective agonists and antagonists, along with radioligand ([3H]tamsulosin) binding assays, were used to determine the α1-adrenoceptor population. A61603, a α1A-adrenoceptor agonist, was a full agonist with a potency 21-fold greater than that of noradrenaline. The α1A- and α1D-adrenoceptor antagonist tamsulosin antagonized noradrenaline responses with high affinity (pKD = 9.7 ± 0.3), whilst BMY7378 (100 nM) (α1D-adrenoceptor antagonist) failed to antagonize responses. In contrast, relatively low affinity estimates were obtained for both prazosin (pKD = 8.2 ± 0.1) and RS17053 (pKD = 6.9 ± 0.2), antagonists which discriminate between the α1A- and α1L-adrenoceptors. [3H]Tamsulosin bound with high affinity to the receptors of human erectile tissue (pKD = 10.3 ± 0.1) with a receptor density of 28.1 ± 1.4 fmol mg−1 protein. Prazosin displacement of [3H]tamsulosin binding revealed a single homogenous population of binding sites with a relatively low affinity for prazosin (pKi = 8.9). Taken together these data confirm that the receptor mediating contraction in human erectile tissue has the pharmacological properties of the α1L-adrenoceptor. Keywords: Erectile tissue, α1-adrenoceptor subtypes, α1L-adrenoceptor, Tamsulosin, Prazosin
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- 2018
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6. The aging bladder insights from animal models
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Lori A. Birder, Aura F. Kullmann, and Christopher R. Chapple
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Alterations in bladder function with aging are very common and are very likely to represent an increasing healthcare problem in the years to come with the general aging of the population. In this review the authors describe the prevalence of lower urinary tract symptoms (LUTS) and comment upon potential mechanisms which may be responsible for the increasing prevalence of lower LUTS with increasing age, based on laboratory studies. It is clear that there is a complex interplay between the various components of the neural innervation structure of the bladder in leading to changes with age, which are likely to underpin the LUTS which are seen in the aging bladder. Keywords: Lower urinary tract symptoms, Aging, Etiology of lower urinary tract symptoms, Bladder function
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- 2018
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7. Overcoming scarring in the urethra: Challenges for tissue engineering
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Abdulmuttalip Simsek, Reem Aldamanhori, Christopher R. Chapple, and Sheila MacNeil
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Urethral stricture disease is increasingly common occurring in about 1% of males over the age of 55. The stricture tissue is rich in myofibroblasts and multi-nucleated giant cells which are thought to be related to stricture formation and collagen synthesis. An increase in collagen is associated with the loss of the normal vasculature of the normal urethra. The actual incidence differs based on worldwide populations, geography, and income. The stricture aetiology, location, length and patient's age and comorbidity are important in deciding the course of treatment. In this review we aim to summarise the existing knowledge of the aetiology of urethral strictures, review current treatment regimens, and present the challenges of using tissue-engineered buccal mucosa (TEBM) to repair scarring of the urethra. In asking this question we are also mindful that recurrent fibrosis occurs in other tissues—how can we learn from these other pathologies? Keywords: Urethral strictures, Fibrosis, Tissue-engineered buccal mucosa, Augmentation urethroplasty
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- 2018
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8. Underactive bladder: Pathophysiology and clinical significance
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Reem Aldamanhori, Nadir I. Osman, and Christopher R. Chapple
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Detrusor underactivity ,Lower urinary tract symptoms ,Underactive bladder ,Bladder outlet obstruction ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Underactive bladder (UAB) is a voiding disorder which generates disabling lower urinary tract symptoms (LUTS) due to the inability to produce an effective voiding contraction sufficient to empty the bladder. The underlying abnormality, that is usually appreciated when performing urodynamic studies, has been defined by the International Continence Society (ICS) as detrusor underactivity (DUA). DUA is a common yet under-researched bladder dysfunction. The prevalence of DUA in different patient groups suggests that multiple aetiologies are implicated. Currently there is no effective therapeutic approach to treat this condition. An improved understanding of the underlying mechanisms is needed to facilitate the development of new advances in treatment. The purpose of this review is to discuss the epidemiology, pathophysiology, common causes and risk factors potentially leading to DUA; to aid in the appropriate diagnosis of DUA to potentially improve treatment outcomes.
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- 2018
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9. Pooled solifenacin overactive bladder trial data: Creation, validation and analysis of an integrated database
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Christopher R. Chapple, Linda Cardozo, Robert Snijder, Emad Siddiqui, and Sender Herschorn
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Integrated database ,Solifenacin ,Validation ,Medicine (General) ,R5-920 - Abstract
Background: Patient-level data are available for 11 randomized, controlled, Phase III/Phase IV solifenacin clinical trials. Methods: Meta-analyses were conducted to interrogate the data, to broaden knowledge about solifenacin and overactive bladder (OAB) in general. Before integrating data, datasets from individual studies were mapped to a single format using methodology developed by the Clinical Data Interchange Standards Consortium (CDISC). Initially, the data structure was harmonized, to ensure identical categorization, using the CDISC Study Data Tabulation Model (SDTM). To allow for patient level meta-analysis, data were integrated and mapped to analysis datasets. Mapping included adding derived and categorical variables and followed standards described as the Analysis Data Model (ADaM). Mapping to both SDTM and ADaM was performed twice by two independent programming teams, results compared, and inconsistencies corrected in the final output. ADaM analysis sets included assignments of patients to the Safety Analysis Set and the Full Analysis Set. Results: There were three analysis groupings: Analysis group 1 (placebo-controlled, monotherapy, fixed-dose studies, n = 3011); Analysis group 2 (placebo-controlled, monotherapy, pooled, fixed- and flexible-dose, n = 5379); Analysis group 3 (all solifenacin monotherapy-treated patients, n = 6539). Treatment groups were: solifenacin 5 mg fixed dose, solifenacin 5/10 mg flexible dose, solifenacin 10 mg fixed dose and overall solifenacin. Patient were similar enough for data pooling to be acceptable. Conclusions: Creating ADaM datasets provided significant information about individual studies and the derivation decisions made in each study; validated ADaM datasets now exist for medical history, efficacy and AEs. Results from these meta-analyses were similar over time.
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- 2016
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10. Management of the patient with failed hypospadias surgery presenting in adulthood [version 1; referees: 3 approved]
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Reem Aldamanhori and Christopher R. Chapple
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Benign Bladder & Urethral Disorders ,Pediatric Urology ,Medicine ,Science - Abstract
The management of patients who have had complications of primary surgery for the resolution of a hypospadiac deformity remains a therapeutic challenge. Adults with complications following childhood hypospadias repairs are undoubtedly a difficult population to treat, as there is usually a cosmetic deformity, lower urinary tract symptoms, and resulting psychosexual consequences. A surgeon’s experience has been and still remains an important factor in determining subsequent surgical outcomes, particularly with more severe or complex cases. The purpose of this review is to evaluate the complications of hypospadias repair that present in adults and review published experience in treating them.
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- 2017
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11. Efficacy and safety of daily mirabegron 50 mg in male patients with overactive bladder: a critical analysis of five phase III studies
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Andrea Tubaro, José E. Batista, Victor W. Nitti, Sender Herschorn, Christopher R. Chapple, Mary Beth Blauwet, Emad Siddiqui, Moses Huang, and Matthias Oelke
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Background: Oral pharmacotherapies to treat overactive bladder (OAB) are used less in men despite a similar prevalence of storage symptoms as women. The efficacy and safety of once-daily mirabegron 50 mg was evaluated in male OAB patients from five phase III studies that included placebo or antimuscarinic (tolterodine ER 4 mg or solifenacin 5 mg) as a comparator. Methods: Three pooled 12-week placebo-controlled studies (mirabegron 50 mg versus placebo) and one 12-week non-inferiority phase IIIb study (BEYOND; mirabegron 50 mg versus solifenacin 5 mg) were used for efficacy (daily micturition frequency, urgency and incontinence episodes) and safety analyses. An additional 52-week active-controlled phase III safety study (mirabegron 50 mg versus tolterodine ER 4 mg) was included in the safety analysis. Male patients aged ⩾18 years with OAB for ⩾3 months were included in the analyses. Patients may also have a history of lower urinary tract symptoms (LUTS) associated with benign prostatic hyperplasia (BPH)/benign prostatic enlargement (BPE) or concomitant use of α 1 -blockers. Results: In the pooled studies, mirabegron 50 mg demonstrated superiority versus placebo (treatment difference: −0.37 [95% confidence interval (CI): −0.74, −0.01]) for reducing micturition frequency; improvements in urgency and incontinence were not significantly different between mirabegron 50 mg and placebo. In BEYOND, mirabegron 50 mg was comparable with solifenacin 5 mg for reducing micturition frequency, urgency, and incontinence episodes. Mirabegron was well tolerated at 12 and 52 weeks and overall treatment-emergent adverse events (AEs) were similar to those with placebo. Conclusions: In a male OAB population with or without LUTS associated with BPH/BPE, mirabegron 50 mg provided similar improvements in urgency, frequency, and incontinence as solifenacin 5 mg, and is a well-tolerated alternative to antimuscarinics. In the three pooled 12-week studies, significant differences were not seen for urgency and incontinence versus placebo, although mirabegron 50 mg did demonstrate significant improvements versus placebo for frequency.
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- 2017
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12. Health And Wellbeing Impact And Treatment of Nocturia – A Review of The Literature
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Nadir I. Osman, Christopher Hillary, and Christopher R. Chapple
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desmopressin ,lower urinary tract symptoms ,Nocturia ,nocturnal polyuria ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Nocturia is a prevalent and highly bothersome lower urinary tract symptom (LUTS) affecting men and women of all ages. In waking to void there is disruption to an individual’s sleep that can lead to daytime tiredness and a loss of vitality. This may significantly impact upon physical, mental, and social wellbeing. It is recognised that nocturia has a multifactorial aetiopathogenesis that encompasses systemic, psychogenic, as well as lower urinary tract factors, necessitating separate evaluation to other LUTS. In particular, nocturnal polyuria is an under-recognised cause of nocturia that may respond well to antidiuretic pharmacotherapy.
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- 2014
13. Functional and reconstructive urology (part one)
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Christopher R. Chapple, M.D., Qiang Fu, M.D., and Chuanliang Xu, M.D.
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Diseases of the genitourinary system. Urology ,RC870-923 - Published
- 2018
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14. Sleep Disorders, Comorbidities, Actions, Lower Urinary Tract Dysfunction, and Medications ('Sleep C.A.L.M.') in the evaluation and management of nocturia: A simple approach to a complex diagnosis
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Thomas F. Monaghan, Jeffrey P. Weiss, Alan J. Wein, Syed N. Rahman, Jason M. Lazar, Donald L. Bliwise, Karel Everaert, Gary E. Lemack, Jean‐Nicolas Cornu, Marcus J. Drake, Christopher R. Chapple, Hashim Hashim, Jerry G. Blaivas, and Roger R. Dmochowski
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Urology ,Neurology (clinical) - Published
- 2023
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15. The patient burden of nocturnal polyuria in the United States: Results from the epidemiology of nocturnal polyuria (EpiNP) study
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Christopher R. Chapple, Matt T. Rosenberg, Elizabeth R. Mueller, Bilal Chughtai, Jeffrey P. Weiss, Kristian Juul, Anne B. Brooks, Elizabeth D. Bacci, Fredrik L. Andersson, Karin S. Coyne, and JLH Ruud Bosch
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Urology ,Neurology (clinical) - Published
- 2023
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16. Erectile and Ejaculatory Function Following Anterior Urethroplasty: A Systematic Review and Meta-analysis
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Karl H. Pang, Nadir I. Osman, Christopher R. Chapple, and Ian Eardley
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Male ,Urology ,Humans - Abstract
The degree of change in erectile (EF) and ejaculatory function (EjF) according to validated questionnaires following anterior urethroplasty and different techniques is unclear.To investigate the evidence on EF and EjF evaluated via validated questionnaires following anterior urethroplasty.A systematic review (PROSPERO ID: CRD42021229797) of the literature was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist. The PubMed and CENTRAL databases were searched on February 1, 2021, with an updated search performed on December 1, 2021. Studies evaluating EF and/or EjF using validated questionnaires in men aged ≥18 yr following anterior urethroplasty were included.Overall, 29 studies (two randomised and 27 nonrandomised) were included. The questionnaire most commonly used to evaluate EF and EjF was the International Index of Erectile Function (IIEF) and Male Sexual Health Questionnaire (MSHQ), respectively. The incidence of postoperative erectile dysfunction (ED) was 0-38% and the mean change in EF score according to the IIEF ranged from -4.0 to 2.5. The incidence of postoperative ejaculatory dysfunction (EjD) was 7.7-67% and the mean change in EjF score according to the MSHQ-EjD was 0.7-7.0. Meta-analyses revealed a mean difference of -0.87 (95% confidence interval [CI] -1.50 to -0.23; p = 0.008) in IIEF-EF score and 1.77 (95% CI 0.61-2.93; p = 0.003) in MSHQ-EjF score following anterior urethroplasty.EF and EjF may be affected following anterior urethroplasty and men should be counselled appropriately. Owing to the variation in questionnaires and cutoff scores used, EF and EjF outcomes following different urethroplasty techniques are heterogeneous, with limited data from randomised controlled trials. An agreement on questionnaires and cutoff scores should be established to allow consistent reporting. Future research should aim to investigate best approaches for minimising sexual dysfunction.Surgical repair of the urethra (urethroplasty) used to treat narrowing of the urethra (urethral stricture) may affect erectile and ejaculatory function. Different questionnaires and definitions are used to evaluate sexual function, so it is hard to compare data. The degree of disruption can be affected by different techniques and the severity of disease.
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- 2022
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17. A diagnostic conundrum: Is it a periurethral diverticulum/cyst or a bulking agent (Bulkamid)?
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Oluwaseun Akinjise‐Ferdinand, Rachel Hubbard, Nadir I. Osman, and Christopher R. Chapple
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Urology ,Neurology (clinical) - Abstract
Urethral bulking agents are commonly used to manage female stress urinary incontinence (SUI) as they have been suggested to be safe, efficacious, and a minimally invasive surgical option. Bulkamid is a newer bulking agent that has been introduced and promoted in the market for use. It is non-particulate in nature with high tissue biocompatibility, and consequently, it is difficult to differentiate between Bulkamid and a periurethral cyst on magnetic resonance imaging (MRI). This, therefore, presents a diagnostic dilemma.Here we describe two cases with previous injections of Bulkamid referred to our Centre for management of a presumed periurethral diverticulum based on MRI findings. Both patients were reviewed and examined in outpatient clinics with MRI findings discussed at MDT, further imaging was required.We found that a limited noncontrast computed tomography (CT) pelvis, followed by a voiding cystometrogram (VCMG), and then a repeat limited noncontrast CT pelvis effectively differentiated between Bulkamid and these presumed periurethral diverticulae. The theory behind this was that during micturition, the contrast would pass through to the urethral diverticulum and appear as high-density (bright) material within the periurethral region (the pre-VCMG was required to prove that any high-density material was due to the contrast and not pre-existing high-contrast material).A CT scan done in conjunction with a VCMG is likely to be more effective in differentiating between Bulkamid and a true periurethral diverticulum than an MRI scan. Appropriate diagnostic evaluation of periurethral lesions can lead to time-saving and cost-effective patient management as this will bypass the need for unnecessary investigations and possible unwarranted surgical intervention.
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- 2022
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18. Differences in the Prevalence of Nocturnal Polyuria in the U.S. by Definition: Results from the Epidemiology of Nocturnal Polyuria Study
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J. L. H. Ruud Bosch, Christopher R. Chapple, Elizabeth R. Mueller, Matt T. Rosenberg, Bilal Chughtai, Kristian Juul, Karin S. Coyne, Fredrik L. Andersson, Elizabeth D. Bacci, Jason C. Simeone, and Jeffrey P. Weiss
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Adult ,Male ,Polyuria ,Urinary Bladder, Overactive ,Urology ,Prevalence ,Humans ,Urination ,Female ,Nocturia - Abstract
Prevalence data on nocturnal polyuria (NP), nocturia caused by overproduction of urine during sleep, is primarily limited to men and varies by NP definition. This U.S.-representative epidemiological study of men and women ≥30 years old assessed the prevalence of NP.Consenting participants completed the baseline EpiNP (Epidemiology of Nocturnal Polyuria) survey (eg Lower Urinary Tract Symptoms Tool, comorbidities). All reporting ≥2 voids/night and a target of 100 random respondents reporting 0 or 1 void/night were asked to complete 3-day bladder diaries. NP was defined as nocturnal polyuria index (NPI)0.33 (NPI33) and nocturnal urine production90 ml/hour (NUP90). Extrapolated prevalence was stratified by sex and subgroups: idiopathic (without underlying causes), associated with overactive bladder (NPOAB), bladder outlet obstruction (NPBOO; men) and comorbidities. Voided volumes and timing, including first uninterrupted sleep period, were assessed by subgroup.A total of 10,190 individuals completed the baseline survey; mean age (range) was 54.4 (30-95). A total of 3,938 individuals were invited to complete the diary; 1,763 (49.3%) completed 3-day bladder diaries. Urine production (maximum nighttime volume, total volume, nocturnal urine production, nocturia index) was higher in both men and women with idiopathic NP and comorbidities. The median number of nighttime voids was greatest for NPBOO in men and NPOAB in women. Bother associated with nighttime voiding differed by NP subgroup but was highest in NPBOO for men (NPI33: 69.6%; NUP90: 71.1%) and NPOAB for women (NPI33: 67.5%; NUP90: 66.0%).This population-based NP prevalence study including men and women characterizes NP subgroups and provides insights into nocturia treatment by emphasizing factors influencing urine production versus factors influencing bladder capacity.
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- 2022
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19. Muscarinic‐3‐receptor positive allosteric modulator ASP8302 in patients with underactive bladder. A randomized controlled trial
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Jan Willem Olivier van Till, Eri Arita, Kentaro Kuroishi, Richard Croy, Matthias Oelke, Gommert A. van Koeveringe, Christopher R. Chapple, Osamu Yamaguchi, Paul Abrams, MUMC+: MA Urologie (9), MUMC+: MA Urologie (3), Urologie, and RS: MHeNs - R3 - Neuroscience
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Adult ,Male ,BETHANECHOL ,Urinary Bladder, Overactive ,DETRUSOR UNDERACTIVITY ,Urology ,Cholinergic Agents ,URINARY-TRACT SYMPTOMS ,underactive bladder ,Receptors, Muscarinic ,Urinary Bladder Neck Obstruction ,Treatment Outcome ,Urinary Incontinence ,Double-Blind Method ,Urinary Bladder, Underactive ,randomized controlled trial ,Humans ,Female ,OBSTRUCTION ,lower urinary tract symptoms ,Neurology (clinical) ,muscarinic receptor M3 ,COMBINATION ,FORM - Abstract
AIM: The aim of this study is to evaluate safety and efficacy of ASP8302, a novel positive allosteric modulator for the muscarinic M3 receptor (M3-PAM), in patients with underactive bladder (UAB).METHODS: A randomized, double-blind, placebo-controlled multicenter study was performed in adult male/female subjects with UAB, defined as incomplete bladder emptying (postvoid residual volume [PVR] > 100 ml) without significant bladder outlet obstruction and/or overactive bladder. Subjects were randomized (1:1) to receive 4-week oral once-daily administration of 100 mg ASP8302 or matching placebo. Primary endpoint was a change from baseline in PVR measured by catheterization after standardized bladder filling (PVRC2 ). Other endpoints included PVR and bladder voiding efficiency (BVE) measured in various ways, uroflowmetry, bladder diary, and questionnaires. Pressure-flow studies were performed in a subgroup.RESULTS: One hundred and thirty-five patients were randomized (ASP8302 group: 65 patients, placebo group: 70 patients). The median change in PVRC2 was -40.0 ml (ASP8302) versus -35.0 ml (placebo) and the difference between groups was -5.0 ml (p = 0.960). In males, functional and symptomatic outcomes improved, for example, maximum urine flow rate (Qmax ) and detrusor pressure at Qmax (Pdet.Qmax ) increased (mean difference in change ASP8302 vs. placebo: 3.8 ml/s, p = 0.031 and 12.7 cm H2 O, p = 0.034, respectively). Urinary incontinence episodes/24 h decreased in males with preexisting incontinence (mean difference: -0.35; p = 0.028). The incidence of adverse events was similar between study groups (ASP8302: 33.3%, placebo: 31.4%). In the included subjects, both baseline urine flow and bladder voiding pressure was low. Compared with PVR, simultaneous BVE measurements were more consistent between various methods (spontaneous vs. standardized bladder filling, catheterization vs. ultrasound [US]).CONCLUSIONS: ASP8302 was safe and well tolerated in patients with UAB identified by nonurodynamic clinical criteria, but it did not show efficacy in the primary endpoint. However, in males it showed improvement of symptoms and functional parameters. BVE (using US) is a more optimal outcome measure than PVR in UAB.
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- 2022
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20. Nocturnal polyuria in women: results from the EpiNP study
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Elizabeth R. Mueller, Jeffrey P. Weiss, J. L. H. Ruud Bosch, Bilal Chughtai, Matt T. Rosenberg, Elizabeth D. Bacci, Jason C. Simeone, Fredrik L. Andersson, Kristian Juul, Karin S. Coyne, and Christopher R. Chapple
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Urology ,Obstetrics and Gynecology - Published
- 2023
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21. Urethral stricture disease
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Jamie V. Krishnan, Nadir I. Osman, and Christopher R. Chapple
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This case discusses the typical presentation, evaluation, and management options offered to male patients with urethral strictures. It uses three case-based scenarios to highlight some potential outcomes and some key differences in the approach and decision-making processes. It reviews the anatomy of the urethra and the pathophysiology of stricture disease and how its management has evolved over the years. It also discusses prognosis and rates of success of intervention.
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- 2023
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22. Prostate-specific Antigen Testing as Part of a Risk-Adapted Early Detection Strategy for Prostate Cancer: European Association of Urology Position and Recommendations for 2021
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Hendrik Van Poppel, James N'Dow, Manfred P. Wirth, James W.F. Catto, Christopher R. Chapple, Monique J. Roobol, Arnulf Stenzl, and Jens Sønksen
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Male ,medicine.medical_specialty ,Package insert ,business.industry ,Urology ,Mortality rate ,Prostatic Neoplasms ,Cancer ,Prostate-Specific Antigen ,medicine.disease ,Prostate cancer ,Prostate-specific antigen ,medicine.anatomical_structure ,Quality of life ,Prostate ,Quality of Life ,medicine ,Humans ,Overdiagnosis ,business ,Early Detection of Cancer - Abstract
Background Recommendations against prostate-specific antigen (PSA) testing in 2012 have increased advanced-stage diagnosis and prostate cancer–specific mortality rates. Objective To present the position of the European Association of Urology (EAU) in 2021 and provide recommendations for the use of PSA testing as part of a risk-adapted strategy for the early detection of prostate cancer. Evidence acquisition The authors combined their review of relevant literature, including the EAU prostate cancer guidelines 2021 update, with their own knowledge to provide an expert opinion, representing the EAU’s position in 2021. Evidence synthesis The EAU has developed a risk-adapted early prostate cancer detection strategy for well-informed men based on PSA testing, risk calculators, and multiparametric magnetic resonance imaging, which can differentiate significant from insignificant prostate cancer. This approach largely avoids the overdiagnosis/overtreatment of men unlikely to experience disease-related symptoms during their lifetime and facilitates an early diagnosis of men with significant cancer to receive active treatment. It also reduces advanced-stage diagnosis, thereby potentially reducing prostate cancer–specific mortality and improving quality of life. Education is required among urologists, general practitioners, radiologists, policy makers, and healthy men, including endorsement by the European Commission to adapt the European Council’s screening recommendations in its 2022 plan and requests to individual countries for its incorporation into national cancer plans. Conclusions This risk-adapted approach for the early detection of prostate cancer will reverse current unfavourable trends and ultimately save lives. Patient summary The European Association of Urology has developed a patient information leaflet and algorithm for the early diagnosis of prostate cancer. It can identify men who do not need magnetic resonance imaging or a biopsy and those who would not show any symptoms versus those with more aggressive disease who require further tests/treatment. We need to raise awareness of this algorithm to ensure that all well-informed men at risk of significant prostate cancer are offered a prostate-specific antigen test. Take Home Message A risk-adapted early prostate cancer detection strategy, incorporating prostate-specific antigen testing, multiparametric magnetic resonance imaging, risk calculators, and biomarkers, will avoid overdiagnosis/overtreatment of insignificant cancers and ensure early detection and treatment of significant cancers, thereby improving quality of life and reducing prostate cancer–related deaths.
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- 2021
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23. Role of Surgery in Bladder Pain Syndrome
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O. A. Alsulaiman, S. Saad, Nadir I. Osman, and Christopher R. Chapple
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medicine.medical_specialty ,Reconstructive surgery ,Medical treatment ,Bladder Pain Syndrome ,Total cystectomy ,business.industry ,Disease ,Biochemistry ,Multidisciplinary approach ,medicine ,Effective treatment ,Presentation (obstetrics) ,Intensive care medicine ,business ,Molecular Biology - Abstract
Bladder pain syndrome is a clinical condition with many aspects to its presentation and numerous suggested treatments, many of which remain controversial. Reconstructive surgery should only be considered when all the conservative options have been exhausted and only after careful counselling. The purpose of this review is to demonstrate the current evidence in the surgical management of this disease, preparatory to which we have reviewed the surgical aspects. For medical treatment, the evidence base is of poor quality and based on case series. Nevertheless, in carefully selected patients after appropriate counselling, excellent results can be achieved both with total cystectomy and augmentation cystoplasty or a continent or incontinent diversion. We reviewed the various success rates of the treatments which are described. A multidisciplinary approach is essential to a successful outcome, and it is essential to consider not only the urological, but also broader medical and psychological consequences seen with bladder pain syndrome. Further research should focus on clearly categorizing the patients with well-defined clinical criteria to provide high-quality evidence to support the selection of the most effective treatment.
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- 2021
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24. Female Urgency, Trial of Urodynamics as Routine Evaluation (FUTURE study): a superiority randomised clinical trial to evaluate the effectiveness and cost-effectiveness of invasive urodynamic investigations in management of women with refractory overactive bladder symptoms
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A. Gammie, Marcus J. Drake, Graeme MacLennan, David A. Cooper, Karen Guerrero, Suzanne Breeman, Christopher R. Chapple, Alyaa Mostafa, John Norrie, Nikki Cotterill, Mohamed Abdel-Fattah, Hashim Hashim, Karen Brown, A. Monga, K. Ward, and S. Dixon
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Adult ,Urinary Incontinence, Urge/diagnosis ,Medicine (General) ,Cost effectiveness ,Data management ,Cost-Benefit Analysis ,Medicine (miscellaneous) ,law.invention ,Study Protocol ,Quality of life (healthcare) ,R5-920 ,Randomized controlled trial ,Nursing ,Chart ,law ,Medicine ,Humans ,Pharmacology (medical) ,Filling cystometry ,Centre for Health and Clinical Research ,Protocol (science) ,Randomised controlled trial ,Cost–benefit analysis ,business.industry ,Urinary Bladder, Overactive ,Overactive bladder ,Urinary Incontinence, Urge ,incontinence, female health, lower urinary tract symptoms ,Clinical trial ,Urodynamics ,Treatment Outcome ,Health ,Quality of Life ,Health & Wellbeing ,Urinary Bladder, Overactive/diagnosis ,Female ,Uroflowmetry ,business - Abstract
Background Overactive bladder (OAB) syndrome is a symptom complex affecting 12–14% of the UK adult female population. Symptoms include urinary urgency, with or without urgency incontinence, increased daytime urinary frequency and nocturia. OAB has a negative impact on women’s social, physical, and psychological wellbeing. Initial treatment includes lifestyle modifications, bladder retraining, pelvic floor exercises and pharmacological therapy. However, these measures are unsuccessful in 25–40% of women (refractory OAB). Before considering invasive treatments, such as Botulinum toxin injection or sacral neuromodulation, most guidelines recommend urodynamics to confirm diagnosis of detrusor overactivity (DO). However, urodynamics may fail to show evidence of DO in up to 45% of cases, hence the need to evaluate its effectiveness and cost-effectiveness. FUTURE (Female Urgency, Trial of Urodynamics as Routine Evaluation) aims to test the hypothesis that, in women with refractory OAB, urodynamics and comprehensive clinical assessment is associated with superior patient-reported outcomes following treatment and is more cost-effective, compared to comprehensive clinical assessment only. Methods FUTURE is a pragmatic, multi-centre, superiority randomised controlled trial. Women aged ≥ 18 years with refractory OAB or urgency predominant mixed urinary incontinence, and who have failed/not tolerated conservative and medical treatment, are considered for trial entry. We aim to recruit 1096 women from approximately 60 secondary/tertiary care hospitals across the UK. All consenting women will complete questionnaires at baseline, 3 months, 6 months and 15 months post-randomisation. The primary outcome is participant-reported success at 15 months post-randomisation measured using the Patient Global Impression of Improvement. The primary economic outcome is incremental cost per quality-adjusted life year gained at 15 months. The secondary outcomes include adverse events, impact on other urinary symptoms and health-related quality of life. Qualitative interviews with participants and clinicians and a health economic evaluation will also be conducted. The statistical analysis of the primary outcome will be by intention-to-treat. Results will be presented as estimates and 95% CIs. Discussion The FUTURE study will inform patients, clinicians and policy makers whether routine urodynamics improves treatment outcomes in women with refractory OAB and whether it is cost-effective. Trial registration ISRCTN63268739. Registered on 14 September 2017.
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- 2021
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25. Contemporary Outcomes of Surgery for Primary and Recurrent Genitourinary Fistulae in a Well-resourced Country
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Christopher Hillary, Nadir I. Osman, Alison P Downey, Aziz Gulamhusein, Christopher R. Chapple, and Richard D. Inman
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medicine.medical_specialty ,business.industry ,Urology ,medicine.medical_treatment ,Fistula ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Urinary incontinence ,medicine.disease ,Vesicovaginal fistula ,Urogenital fistula ,Diseases of the genitourinary system. Urology ,Reconstructive urology ,Surgery ,Cystectomy ,Genitourinary Fistula ,Overactive bladder ,Interquartile range ,Urinary Fistula ,Genitourinary fistula ,Medicine ,RC870-923 ,medicine.symptom ,business ,RC254-282 - Abstract
Background Urinary fistula (UF) is a global health problem but less common in well-resourced countries. Over the past decade there has been a trend toward managing UF in dedicated centres. Most of the evidence for surgical treatment is from individual case series, with few publications that involve high numbers. We describe the repair of recurrent and complex UF cases and outcomes in a tertiary referral setting. Objective To describe UF aetiology, repair techniques, and outcomes. Design, setting, and participants This is a retrospective study of a series of patients undergoing UF repair at a specialist unit. Outcome measurements and statistical analysis We describe the aetiology, cure rate, complications, and postoperative urinary incontinence rates for the series of UF cases. Results and limitations A consecutive series of 98 patients was identified, all of whom were tertiary referrals. Of these, 31 (31.6%) had at least one prior attempt at repair at another centre. The median age was 48 yr (interquartile range [IQR] 40–60.25). The median time from occurrence to repair was 12 mo (IQR 6–12). UF occurred most commonly following hysterectomy (48.0%), Caesarean section (9.2%), other gynaecological surgery (7.1%), and anti-incontinence surgery (7.1%). Complex fistulae (eg, repeat cases, radiation, ureteric involvement) comprised 41 of the cases (41.8%). Most patients with vesicovaginal fistula underwent repair via a transabdominal approach (70.4%). Tissue interposition was used in 96 cases (98%). There were no Clavien-Dindo grade >3 complications. Two patients (2%) had a persistent UF postoperatively. Two patients (2%) developed recurrence more than 2 yr after their initial repair, and both were successfully repaired at our centre. Twelve patients (12.3%) developed de novo overactive bladder, 22 (22.5%) developed stress urinary incontinence (13 had subsequent incontinence surgery), and two (2%) developed bladder pain (both had a subsequent cystectomy). Conclusions Despite a high rate of recurrent and complex UF, successful lasting closure was achieved in 96% of our cases. A minority of patients developed other problems such as de novo overactive bladder and stress urinary incontinence that may require further treatment. Patient summary Urinary fistula is an abnormal opening or connection in the urinary tract and is less common in well-resourced countries. As a consequence, management of this condition is more frequently undertaken at specialist units. Even patients with a complex fistula and those who have had multiple attempts at repair can experience a cure. Urinary leakage is a common complication after the operation but can be successfully managed with surgery., Take Home Message Despite a high number of complex and recurrent cases, we achieved a success rate in excess of 95% in the surgical management of genitourinary fistula. It is important that such cases are managed by teams of surgeons who are comfortable in undertaking both vaginal and abdominal approaches to repair.
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- 2021
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26. Differences in the Prevalence of Nocturnal Polyuria in the U.S. by Definition: Results From the Epidemiology of Nocturnal Polyuria Study. Reply
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J. L. H. Ruud Bosch, Christopher R. Chapple, Elizabeth R. Mueller, Matt T. Rosenberg, Bilal Chughtai, Kristian Juul, Karin S. Coyne, Fredrik L. Andersson, Elizabeth D. Bacci, Jason C. Simeone, and Jeffrey P. Weiss
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Urology - Published
- 2023
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27. Comparison of Supine and Prone Positioning in Female Patients Undergoing Urethral Diverticulum Excision
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Richard D. Inman, Christopher R. Chapple, and Naside Mangir
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medicine.medical_specialty ,Supine position ,business.industry ,lcsh:Surgery ,lcsh:RD1-811 ,surgical outcomes ,lcsh:Diseases of the genitourinary system. Urology ,lcsh:RC870-923 ,Surgery ,urethral diverticulum ,Prone position ,Female patient ,prone position ,Urethral diverticulum ,Medicine ,medicine.symptom ,business - Abstract
Objective:Transvaginal excision of urethral diverticulum (UD) is the gold standard treatment for symptomatic women with UD. Complete UD excision can be challenging due to poor access to the surgical field, especially with proximal, circumferential and recurrent UD. Prone patient positioning has been suggested as an effective way of improving surgical access and vision compared to the traditional supine positioning. However, direct comparison of the two positions is yet to be performed. This study aimed to compare patients who underwent UD excision in prone and supine positions.Materials and Methods:Prospectively recorded data of 79 women undergoing urethral diverticulectomy between 2004 and 2017 in a single referral centre were reviewed. Patients were operated either in supine or prone positions based on the surgeon’s preference. Data collected included patient demographics, UD characteristics on magnetic resonance imaging, intraoperative details and postoperative outcomes. Operative time was calculated from the electronic theatre records starting from the entry of the patient into the operating room to their exit.Results:The mean patient age was 42.38 (±15.24) years. More than half of the patients had a recurrent UD at presentation (51.89%). The mean size of the diverticulum was 25.06 (±1.2) mm, and the mean operative time was 146.18 (±6.0) min. UD excision was undertaken in prone position in 50 (63.3%) and supine position in 29 (36.7%) patients. Patients in the prone position group were older and had relatively larger and proximal UD. In the multivariable analysis, it was found that a proximally located UD was the main indicator for undergoing surgery in the prone position.Conclusion:Despite longer operative times, prone patient positioning appears to be the preferred option for patients with larger and proximal UD, presumably because it offers better access to the surgical field.
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- 2021
28. The Modified Prone Jack-knife Position for the Excision of Female Urethral Diverticula
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Antonio Franco, Richard D. Inman, Felicity A. Reeves, Ester Ricci, Christopher R. Chapple, Nadir I. Osman, and Naside Mangir
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Adult ,medicine.medical_specialty ,Stress incontinence ,Supine position ,Urology ,030232 urology & nephrology ,Urinary incontinence ,Patient Positioning ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Lower urinary tract symptoms ,Urethral Diseases ,medicine ,Humans ,Dysuria ,Aged ,Retrospective Studies ,Aged, 80 and over ,business.industry ,Pelvic pain ,Middle Aged ,medicine.disease ,Surgery ,Diverticulum ,Prone position ,Urethra ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Urologic Surgical Procedures ,Female ,medicine.symptom ,business - Abstract
Background Female urethral diverticula (UD) are an uncommon and often overlooked aetiology in women presenting with lower urinary tract symptoms, urethral pain, and recurrent urinary tract infection. With increasing awareness, appropriate imaging is more commonly undertaken with consideration given to surgical management. Objective The video presented demonstrates the technique for excising large and/or complex UD using a modified prone jack-knife position—a position that offers excellent surgical access and allows the surgeon to operate in a more ergonomic position. Design, setting, and participants A retrospective review of the data on patients undergoing excision of UD at a tertiary referral unit was performed. Surgical procedure Urethral and suprapubic catheters (±insertion of ureteric stents) were placed in supine position. UD excised in the modified prone jack-knife position (±placement of a Martius flap). Measurements Subjective cure rate, recurrence rate, rates of postoperative urinary incontinence, need for secondary incontinence procedure, and postoperative complications were measured. Results and limitations A total of 121 patients were operated on in the study period. The mean follow-up time was 10 mo (range 3–40). The most frequent presenting symptoms included a vaginal mass (n = 76, 63%), followed by dysuria (n = 72, 60%) and pelvic pain (n = 71, 59%). An identifiable aetiological factor was present in 45 patients, including traumatic vaginal delivery (18, 15%), prior periurethral surgery (17, 14%), and urethral dilatation (10, 8%). All patients underwent postvoiding magnetic resonance imaging (MRI) to confirm the diagnosis and plan surgery. UD ranged in maximum diameter from 8 to 48 mm, with a mean of 43 mm (standard deviation 9.24). The most common anatomical location was midurethral (55, 46%), followed by distal (36, 30%), proximal (25, 21%), and full length (5, 4%). Most UDs were single in configuration (74%), followed by multiloculated (15%), saddle shaped (7%), and circumferential (5%). On preoperative videourodynamics, 17 (14%) had stress urinary incontinence. UD excision was undertaken in the modified prone jack-knife position in all cases. A Martius flap was utilised in 36 (30%). The median postoperative postvoiding residual was 26 ml (interquartile range 0–40). In total, 88 (73%) patients were continent postoperatively and 16 (13%) experienced de novo stress urinary incontinence. Of the 37 with pre-existing stress incontinence symptoms, 20 (54%) were continent after operation. A total of 14 patients had subsequent autologous fascial sling at 6 mo. In total, five symptomatic recurrences occurred (4%); of these patients, three elected to undergo surgical excision, all of whom had symptom resolution and were continent after operation. A total of 11 patients (9%) experienced a Clavien-Dindo grade I–II complication within 90 d after operation. Five patients complained of dyspareunia, which resolved by 6 mo. Conclusions The modified prone jack-knife position facilitates excellent access for excision of both simple and complex UDs. This positioning of the patient is not widely recognised amongst urologists. Using this approach, there were low rates of symptomatic recurrence and de novo stress incontinence at medium-term follow-up. Associated urinary incontinence resolves in over half of patients following UD excision; hence, we advocate deferring any incontinence procedure until after the results of surgery are established. Patient summary Surgical removal of urethral outpouching (diverticula) in women is challenging due to its potential to damage the nearby sphincter muscle, which controls continence, or the urethra tube. Placement of patients on their front, rather than on their back, provides excellent access for the surgical removal of urethral diverticula. With this approach, we achieved excellent rates of cure and low rates of urinary incontinence at an average follow-up of 10 mo.
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- 2021
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29. Evaluation and management of anterior urethral stricture disease [version 1; referees: 2 approved]
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Altaf Mangera, Nadir Osman, and Christopher R. Chapple
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Review ,Articles ,Benign Bladder & Urethral Disorders ,Urethral stricture disease ,urethrotomy ,dilatation ,urethrography - Abstract
Urethral stricture disease affects many men worldwide. Traditionally, the investigation of choice has been urethrography and the management of choice has been urethrotomy/dilatation. In this review, we discuss the evidence behind the use of ultrasonography in stricture assessment. We also discuss the factors a surgeon should consider when deciding the management options with each individual patient. Not all strictures are identical and surgeons should appreciate the poor long-term results of urethrotomy/dilatation for strictures longer than 2 cm, strictures in the penile urethra, recurrent strictures, and strictures secondary to lichen sclerosus. These patients may benefit from primary urethroplasty if they have many adverse features or secondary urethroplasty after the first recurrence.
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- 2016
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30. The underactive bladder: detection and diagnosis [version 1; referees: 2 approved]
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Nadir Osman, Altaf Mangera, Christopher Hillary, Richard Inman, and Christopher R. Chapple
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Review ,Articles ,Benign Bladder & Urethral Disorders ,Lower Urinary Tract: Dysfunction, Incontinence & Urodynamics ,Underactive bladder ,detrusor underactivity ,chronic urinary retention - Abstract
The inability to generate a voiding contraction sufficient to allow efficient bladder emptying within a reasonable time frame is a common problem seen in urological practice. Typically, the symptoms that arise are voiding symptoms, such as weak and slow urinary flow. These symptoms can cause considerable bother to patients and impact upon quality of life. The urodynamic finding of inadequate detrusor contraction has been termed detrusor underactivity (DUA). Although a definition is available for this entity, there are no widely accepted diagnostic criteria. Drawing parallels to detrusor overactivity and the overactive bladder, the symptoms arising from DUA have been referred to as the “underactive bladder” (UAB), while attempts to crystallize the definition of UAB are now ongoing. In this article, we review the contemporary literature pertaining to the epidemiology and etiopathogenesis of DUA as well as discuss the definitional aspects that are currently under consideration.
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- 2016
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31. Recent advances in understanding urethral lichen sclerosus [version 1; referees: 3 approved]
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Altaf Mangera, Nadir Osman, and Christopher R. Chapple
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Review ,Articles ,Autoimmunity ,Benign Bladder & Urethral Disorders ,Cell Adhesion ,Cellular Death & Stress Responses ,Genito-Urinary & Reproductive Pharmacology ,Psoriasis & Other Inflammatory Diseases ,lichen sclerosus ,male lichen sclerosus ,inflammatory dermatosis - Abstract
Lichen sclerosus affecting the male genitalia is a poorly understood but potentially devastating condition. The natural history of the condition is beginning to be understood better with longer follow-up of patients. Recent long-term data suggest that circumcision for lichen sclerosus limited to the prepuce may not be curative as was once thought. In addition, surgical treatments should be followed up for longer periods as recurrences may occur after urethroplasty and perineal urethrostomy.
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- 2016
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32. Treatment decision‐making among men with lower urinary tract symptoms: A qualitative study of men's experiences with recommendations for patient‐centred practice
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Cynthia A Ochieng, Christopher R. Chapple, Lucy E Selman, Amanda L. Lewis, Marcus J. Drake, Clare Clement, Jeremy Horwood, and Paul Abrams
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Male ,medicine.medical_specialty ,Urology ,Decision Making ,030232 urology & nephrology ,Nonprobability sampling ,03 medical and health sciences ,0302 clinical medicine ,Lower Urinary Tract Symptoms ,Lower urinary tract symptoms ,medicine ,Humans ,Qualitative Research ,Aged ,Aged, 80 and over ,030219 obstetrics & reproductive medicine ,business.industry ,Symptom burden ,Patient Preference ,Middle Aged ,medicine.disease ,Nonsurgical treatment ,Family medicine ,Neurology (clinical) ,Treatment decision making ,Thematic analysis ,business ,Patient centred ,Qualitative research - Abstract
Aims To inform and guide patient-centred care for men with lower urinary tract symptoms (LUTS), by providing in-depth qualitative evidence regarding men's perspectives on treatment decision-making for LUTS. Methods An interview study of men recruited from 26 English urology departments. Purposive sampling captured surgical/nonsurgical treatment decisions, and diversity in demographics and symptom burden, in men who had urodynamics and those who did not. After diagnostic assessments, men were interviewed either pre-treatment or after LUTS surgery. Thematic analysis was conducted. Participants' descriptions of how LUTS treatment decisions were made were categorised as patient-led, doctor-led, or shared. Results A total of 41 men participated (25 pre-treatment, 16 post-surgery), ages 52-89. Twenty out of 41 described the treatment decision as shared with their consultant, 14 as doctor-led, and seven as patient-led. There was no obvious association between treatment decision-making style and patients' satisfaction with either clinicians' role in their decision or their treatment decision. Incomplete or rushed discussions and misperceptions of LUTS and its treatment were reported, indicating a risk of suboptimal decision-making support by clinicians. As well as clinician opinion, men's treatment decision-making was influenced by the results of urological assessments, comparing current symptoms with possible side-effects of surgery, and others' experiences and opinions. Conclusions Men with LUTS report and prefer different kinds of decision-making support from their clinicians, who must tailor their input to patients' preferences and needs. Patients' treatment decision-making involves multiple factors and can be challenging, and areas of inadequate clinician support were identified. Recommendations for patient-centred consultations about LUTS treatment are presented.
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- 2020
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33. Multicriteria Decision Analysis Applied to the Clinical Use of Pharmacotherapy for Overactive Bladder Symptom Complex
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David Castro Díaz, Andrea Tubaro, Heinz Koelbl, D. Pushkar, Christopher R. Chapple, Emmanuel Chartier-Kastler, Adrian Wagg, Lawrence D. Phillips, Dirk De Ridder, Emma Mironska, and Ian Milsom
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medicine.medical_specialty ,Urology ,030232 urology & nephrology ,Adrenergic beta-3 Receptor Agonists ,Context (language use) ,Muscarinic Antagonists ,Decision Support Techniques ,03 medical and health sciences ,0302 clinical medicine ,Pharmacotherapy ,medicine ,Fesoterodine ,Humans ,Intensive care medicine ,Randomized Controlled Trials as Topic ,Solifenacin ,Urinary Bladder, Overactive ,business.industry ,medicine.disease ,Regimen ,Systematic review ,Overactive bladder ,030220 oncology & carcinogenesis ,business ,Mirabegron ,medicine.drug - Abstract
Context The nonspecific storage symptom complex overactive bladder (OAB) is an important clinical condition in functional urology. Until recently, pharmacological therapy comprised antimuscarinic drugs, but more recently beta 3 agonists have added to the available agents. Traditional reporting of efficacy and safety of these agents relies upon regulatory placebo-controlled studies. There remains no head-to-head comparison of existing agents in the contemporary literature. Contemporary conclusions on comparative efficacy and safety drawn from the use of these agents are based on systematic reviews of the literature and associated meta-analyses. Objective In this study, we used the analytical model of multicriteria decision analysis (MCDA) to compare contemporary pharmacotherapy for OAB. Evidence acquisition Efficacy and safety data from published, randomised, placebo-controlled trials of antimuscarinic antagonists, the beta 3 agonist, and the combination of an antimuscarinic and beta 3 agonist were used to populate the MCDA model. Evidence synthesis Experts assessed weights of the relative importance of favourable and unfavourable effects, which provided a common measure of benefits and safety that were combined in the MCDA model to give an overall ranking of the OAB drugs. Results When benefits are judged as more important than safety, fesoterodine 4 or 8 mg used in a flexible dosing pattern provides the most favourable therapeutic option, over a wide sensitivity analysis relating to benefits and harms. Conclusions In our analysis using an MCDA model, in both the flexible dosing pattern of fesoterodine and the solifenacin combination with mirabegron, the benefit-safety balance is better in terms of benefits and/or safety than any of the other available OAB drugs. Caution in interpretation of the data has to be expressed as the fesoterodine data are based on a flexible dosing regimen, which adds an additional dimension of personalising therapy. Patient summary Overactive bladder (OAB) is a common condition with a significant impact on the quality of life. Possible symptoms include the following: (1) urgency—a compelling desire to urinate, which is difficult to defer; (2) urgency urinary incontinence—urgency leading to incontinence episodes; (3) frequency—increased frequency of wanting to pass urine; and (4) nocturia—increase in instances of getting up at night to urinate. To date, the mainstay of therapy for OAB has been antimuscarinic drugs and, more recently, the beta 3 agonist mirabegron. Ten international experts in urology, obstetrics, gynaecology, healthy ageing, and data analysis compared the benefit-risk balance of 14 OAB drugs licensed in Europe. The experts considered the importance of a favourable effect on the above four symptoms and also potential for side effects, but only three of these side effects, constipation, dry mouth, and dizziness, showed clinically relevant differences among the six drugs they considered. The observations recorded here suggest interesting differences between drugs across a wide range of possible trade-offs between benefit and safety. The different recruitment criteria used for each study may influence the results seen, so they need to be treated with caution. Comparison of flexibly dosed fesoterodine studies with fixed-dose fesoterodine studies introduces an additional potential bias; definitive conclusions can be drawn only if enough comparable placebo-controlled flexible dosing studies with other drugs were available.
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- 2020
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34. Management of urinary incontinence in men
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Christopher R. Chapple and Naside Mangir
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medicine.medical_specialty ,business.industry ,Urology ,medicine ,Urinary incontinence ,medicine.symptom ,business - Published
- 2020
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35. Safety and Efficacy of Mirabegron: Analysis of a Large Integrated Clinical Trial Database of Patients with Overactive Bladder Receiving Mirabegron, Antimuscarinics, or Placebo
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Nurul Choudhury, Sender Herschorn, Matthias Stoelzel, John Heesakkers, Christopher R. Chapple, Linda Cardozo, Francisco Cruz, Emad Siddiqui, and David R. Staskin
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Male ,medicine.medical_specialty ,Databases, Factual ,Tolterodine Tartrate ,Urology ,030232 urology & nephrology ,MEDLINE ,Adrenergic beta-3 Receptor Agonists ,Muscarinic Antagonists ,Placebo ,03 medical and health sciences ,0302 clinical medicine ,All institutes and research themes of the Radboud University Medical Center ,Double-Blind Method ,Internal medicine ,medicine ,Nocturia ,Humans ,Medical history ,Aged ,Solifenacin ,Urinary Bladder, Overactive ,business.industry ,Solifenacin Succinate ,Middle Aged ,medicine.disease ,Clinical trial ,Thiazoles ,Editorial Commentary ,Treatment Outcome ,Reconstructive and regenerative medicine Radboud Institute for Molecular Life Sciences [Radboudumc 10] ,Reproductive Medicine ,Overactive bladder ,030220 oncology & carcinogenesis ,Acetanilides ,Female ,Tolterodine ,medicine.symptom ,Mirabegron ,business ,medicine.drug - Abstract
Mirabegron, a β3-adrenoreceptor agonist, is an alternative drug to antimuscarinics for overactive bladder (OAB) symptoms.To summarise safety and efficacy reporting of mirabegron treatment for OAB symptoms.Pooled data analysed from 10 phase 2-4, double-blind, 12-wk mirabegron monotherapy studies in adults with OAB who had received one or more doses of study drug.Mirabegron: 25 and 50mg; antimuscarinics: solifenacin (2.5, 5, and 10mg) and tolterodine extended release (4mg).Baseline OAB-related characteristics, intrinsic and extrinsic factors, and analyses by age (65 vs ≥65yr and75 vs ≥75yr) and sex were assessed. Solifenacin 2.5 and 10mg groups were not included in the efficacy analyses (small patient numbers). Safety was evaluated using the proportion of treatment-emergent adverse events. Efficacy variables were derived from bladder diaries (baseline and week 12).Baseline hypertension and diabetes were more frequent across treatment groups in the older versus younger age groups and in men versus women. Within sexes, frequencies were similar between treatment groups. Some differences were observed in baseline characteristics, including type of incontinence and medical history between sexes. No previously unreported safety concerns were identified. Improvements in efficacy (mean number of incontinence episodes/24h, micturitions/24h, urgency episodes/24h, volume voided/micturition, and nocturia episodes) versus placebo were observed in all treatment groups. Significant treatment-by-subgroup interactions included change from baseline in the mean number of incontinence episodes/24h by age (65 vs ≥65yr), nocturia by age (65 vs ≥65yr and75 vs ≥75yr), and urgency episodes by previous OAB medication.Data from this integrated database of 10 mirabegron studies reaffirm the safety and efficacy profiles of mirabegron, solifenacin, and tolterodine in adults of different age groups and sexes.Overactive bladder is a complex of symptoms including a compelling desire to pass urine that leads to increased frequency, which may lead to a degree of incontinence if you do not reach the toilet in time and may wake you from sleep. We pooled data from 10 different studies of mirabegron in patients with overactive bladder symptoms, and looked at the effect in the total number of patients who received the treatment, as well as in different age groups and between men and women. No new safety concerns were identified, and mirabegron improved the symptoms of overactive bladder.
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- 2020
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36. Regenerative medicine relating to urethroplasty
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Sanad Saad and Christopher R. Chapple
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- 2022
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37. List of contributors
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Davide Adamo, João Ernesto Aldred, Anthony Atala, Eustachio Attico, Gopal H. Badlani, Guido Barbagli, Elizabeth Boes, Michael Callegari, André Cavalcanti, Christopher R. Chapple, Amr S. El Haraki, M. Ryan Farrell, Vincenzo Giuseppe Genna, Madeleine M. Goedegebuure, Karishma Gupta, Shubham Gupta, Matthias D. Hofer, Melissa Kaufman, Massimo Lazzeri, Federica Maria Magrelli, Francisco E. Martins, Eleonora Maurizi, Allen F. Morey, Dmitriy Nikolavsky, Graziella Pellegrini, Aaron J. Perecman, Connor Policastro, Carlos Felipe Restreppo, Sanad Saad, Kyle A. Scarberry, Virginia Sceberras, Alex Schul, Elisabeth M. Sebesta, Arun K. Sharma, Joshua Sterling, Ryan P. Terlecki, Alex J. Vanni, Larry Wang, and Koudy J. Williams
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- 2022
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38. The Prevalence of Nocturnal Polyuria in the United States: Results from the Epidemiology of Nocturnal Polyuria Study
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Jeffrey P. Weiss, J.L.H. Ruud Bosch, Christopher R. Chapple, Elizabeth D. Bacci, Jason C. Simeone, Matt T. Rosenberg, Elizabeth R. Mueller, Fredrik L. Andersson, Kristian Juul, Bilal Chughtai, and Karin S. Coyne
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Male ,Lower Urinary Tract Symptoms ,Polyuria ,Urology ,Prevalence ,Humans ,Urination ,Female ,Nocturia ,Middle Aged ,United States ,Aged - Abstract
The prevalence of nocturnal polyuria (NP), which is passing large volumes of urine during the main sleep period, has been investigated primarily in middle-aged to older men. There is thus a gap in the NP evidence base for women and for younger individuals.To estimate the prevalence of nocturia due to NP in the USA.This large epidemiologic study used a US population-representative sample of men and women aged ≥30 yr to assess the prevalence of NP (NCT04125186).Consenting participants completed an online survey (Lower Urinary Tract Symptoms Tool and comorbidities). All who reported two or more voids per night and 100 random respondents each reporting no or one void per night were asked to complete a 3-d bladder diary. Two NP definitions were used: nocturnal urine production90 ml/h (NUP90) and Nocturnal Polyuria Index0.33 (NPI33). Crude and population-adjusted prevalence results were calculated from completed diaries for the following subgroups by sex and age: idiopathic NP; NP with overactive bladder (NP-OAB) or bladder outlet obstruction (NP-BOO; men only); NP associated with other comorbidities; and no NP (did not meet the NPI33 or NUP90 definition).Among the 10,190 respondents who completed the survey, the mean age was 54.4 yr (range 30-95); 3,339 reported two or more nocturnal voids and 1,763 completed the 3-d diary (response rate 49.3%). The adjusted overall NP prevalence was 31.5% among men and 38.5% among women using the NPI33 definition, and 23.8% among men and 18.1% among women using NUP90. The adjusted idiopathic NP prevalence was lower among men (NPI33: 5.2%; NUP90: 1.4%) than among women (NPI33: 9.8%; NUP90: 4.0%). The prevalence of idiopathic NP decreased with age as NP associated with other possible causes increased with age in men (most common, BOO) and women (most common, OAB).This is the first population-based study of NP prevalence to include men, women, and young adults. NP is common; a multifactorial etiology should be considered, particularly as age increases.In this population-based US study, we examined the frequency of nighttime urination among men and women aged ≥30 y and older. We found that nighttime urination is common among men and women. Many conditions can lead to increased nighttime urination as people age.
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- 2021
39. Reconstruction
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Nadir I. Osman, Karl H. Pang, and Christopher R. Chapple
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- 2021
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40. Basic Urological Sciences
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Christopher R. Chapple, James W.F. Catto, Nadir I. Osman, and Karl H. Pang
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- 2021
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41. MP08-19 COMORBID CONDITIONS ASSOCIATED WITH NOCTURNAL POLYURIA: RESULTS FROM THE EPIDEMIOLOGY OF NOCTURNAL POLYURIA (EpiNP) STUDY
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Fredrik L. Andersson, Christopher R. Chapple, Elizabeth D. Bacci, Anne B. Brooks, Jlh Ruud Bosch, and Matt T. Rosenberg
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medicine.medical_specialty ,Pediatrics ,Nocturnal polyuria ,Epidemiologic study ,business.industry ,Urology ,Epidemiology ,medicine ,business - Abstract
INTRODUCTION AND OBJECTIVE:To assess the prevalence of nocturnal polyuria (NP) in a large epidemiologic study of a US population-representative sample of men (M) and women (W) ≥30 years (The EpiNP ...
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- 2021
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42. Tissue engineering: recent advances and review of clinical outcome for urethral strictures
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Christopher R. Chapple, Sanad Saad, and Nadir I. Osman
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Male ,Urethral Stricture ,medicine.medical_specialty ,Decellularization ,Tissue engineered ,Urethrotomy ,Tissue Engineering ,Urethral stricture ,business.industry ,Urology ,Urethroplasty ,medicine.medical_treatment ,Mouth Mucosa ,Plastic Surgery Procedures ,medicine.disease ,Surgery ,Urethra ,medicine.anatomical_structure ,Tissue engineering ,medicine ,Animals ,Humans ,Failed urethrotomy ,business - Abstract
Purpose of review Urethrotomy remains the first-line therapy in the treatment of a urethral stricture despite data showing no real chance of a cure after repeated urethrotomies. An anastomotic or an augmentation urethroplasty using oral mucosa can be offered to patients following failed urethrotomy. The potential for a tissue engineered solution as an alternative to native tissue has been explored in recent years and is reviewed in this article. Recent findings More than 80 preclinical studies have investigated a tissue-engineered approach for urethral reconstruction mostly using decellularized natural scaffolds derived from natural extracellular matrix with or without cell seeding. The animal models used in preclinical testing are not representative of disease processes seen with strictures in man. The available clinical studies are based on small noncontrolled series. Summary There is a potential role for tissue engineering to provide a material for substitution urethroplasty and work has demonstrated this. Further work will require a rigorous basic science programme and adequate evaluation of the material prior to its introduction into clinical practice. The research with tissue engineering applied to the urethra has not yet been resulted in a widely available material for clinical use that approaches the efficacy seen with the use of autologous grafts.
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- 2021
43. Diagnostic Tests for Female Bladder Outlet Obstruction: A Systematic Review from the European Association of Urology Non-neurogenic Female LUTS Guidelines Panel
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Véronique Phé, Serenella Monagas Arteaga, Jan Groen, Fawzy Farag, Neha Sihra, Arjun Nambiar, Karl H. Pang, Aisling Nic an Riogh, Yuhong Yuan, Christopher R. Chapple, Markos Karavitakis, Salvador Arlandis, Nadir I. Osman, Vasileios Sakalis, Margarida Manso, Muhammad Imran Omar, Elisabetta Costantini, Kari Bo, Huub van der Vaart, Benoit Peyronnet, Riccardo Campi, Christopher Harding, Lazaros Tzelves, Eabhann O’Connor, and Marie Carmela M. Lapitan
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Male ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Diagnostic Tests, Routine ,Urology ,Urinary Bladder ,MEDLINE ,Context (language use) ,Nomogram ,urologic and male genital diseases ,medicine.disease ,Accuracy, Bladder outlet obstruction, Diagnosis, Female, Lower urinary tract symptoms, Test, Urodynamics ,Urinary Bladder Neck Obstruction ,Bladder outlet obstruction ,Neck of urinary bladder ,Urodynamics ,Systematic review ,Lower urinary tract symptoms ,medicine ,Fluoroscopy ,Humans ,Female ,Radiology ,business - Abstract
Context Female bladder outlet obstruction (fBOO) is a relatively uncommon condition compared with its male counterpart. Several criteria have been proposed to define fBOO, but the comparative diagnostic accuracy of these remains uncertain. Objective To identify and compare different tests to diagnose fBOO through a systematic review process. Evidence acquisition A systematic review of the literature was performed according to the Cochrane Handbook and Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) checklist. The EMBASE/MEDLINE/Cochrane databases were searched up to August 4, 2020. Studies on women ≥18 yr of age with suspected bladder outlet obstruction (BOO) involving diagnostic tests were included. Pressure-flow studies or fluoroscopy was used as the reference standard where possible. Two reviewers independently screened all articles, searched reference lists of retrieved articles, and performed data extraction. The risk of bias was assessed using Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2). Evidence synthesis Overall, 28 nonrandomised studies involving 10 248 patients were included in the qualitative analysis. There was significant heterogeneity regarding the characteristics of women included in BOO cohorts (ie, mixed cohorts including both anatomical and functional BOO). Pressure-flow studies ± fluoroscopy was evaluated in 25 studies. Transperineal Doppler ultrasound was used to evaluate bladder neck dynamics in two studies. One study tested the efficacy of transvaginal ultrasound. The urodynamic definition of fBOO also varied amongst studies with different parameters and thresholds used, which precluded a meta-analysis. Three studies derived nomograms using the maximum flow rate (Qmax) and voiding detrusor pressure at Qmax. The sensitivity, specificity, and overall accuracy ranges were 54.6–92.5%, 64.6–93.9%, and 64.1–92.2%, respectively. Conclusions The available evidence on diagnostic tests for fBOO is limited and heterogeneous. Pressure-flow studies ± fluoroscopy remains the current standard for diagnosing fBOO. Patient summary Evidence on tests used to diagnose female bladder outlet obstruction was reviewed. The most common test used was pressure-flow studies ± fluoroscopy, which remains the current standard for diagnosing bladder outlet obstruction in women. Take Home Message The available evidence on diagnostic tests for female bladder outlet obstruction is limited and heterogeneous. The most common test used was video-urodynamics, which remains the current standard for diagnosing bladder outlet obstruction in women.
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- 2021
44. Reply to Sanjay B. Kulkarni, Pankaj M. Joshi, Marco Bandini, et al.’s Letter to the Editor re: Sanad Saad, Nadir I. Osman, Christopher R. Chapple. Female Urethra: Is Ventral the True Dorsal? Eur Urol 2020;78:e218–9
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Christopher R. Chapple, Nadir I. Osman, and Sanad Saad
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Dorsum ,Letter to the editor ,business.industry ,Urology ,Medicine ,Anatomy ,business ,Nadir (topography) ,Female urethra - Published
- 2022
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45. Corrigendum re 'Multicriteria Decision Analysis Applied to the Clinical Use of Pharmacotherapy for Overactive Bladder Symptom Complex' [Eur Urol Focus 2020;6:522–30]
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Lawrence D. Phillips, D. Pushkar, Andrea Tubaro, Ian Milsom, Adrian Wagg, Christopher R. Chapple, Emma Mironska, Heinz Koelbl, Dirk De Ridder, David Castro Díaz, and Emmanuel Chartier-Kastler
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Multicriteria decision ,Focus (computing) ,medicine.medical_specialty ,Pharmacotherapy ,Overactive bladder ,business.industry ,Urology ,MEDLINE ,medicine ,medicine.disease ,Intensive care medicine ,business - Published
- 2022
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46. Efficacy and Safety of Combination Pharmacotherapy for Patients with Overactive Bladder: A Rapid Evidence Assessment
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Christopher R. Chapple, Elizabeth R. Mueller, Emad Siddiqui, Christian Gratzke, Matthias Stoelzel, Dudley Robinson, Catherine Rolland, David R. Staskin, and Rob van Maanen
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medicine.medical_specialty ,Urology ,030232 urology & nephrology ,Adrenergic beta-3 Receptor Agonists ,Context (language use) ,Muscarinic Antagonists ,Placebo ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,law ,Internal medicine ,medicine ,Clinical endpoint ,Humans ,Randomized Controlled Trials as Topic ,Solifenacin ,Urinary Bladder, Overactive ,business.industry ,medicine.disease ,Treatment Outcome ,Overactive bladder ,030220 oncology & carcinogenesis ,Drug Therapy, Combination ,Propiverine ,Mirabegron ,business ,medicine.drug - Abstract
Oral pharmacotherapy consisting of antimuscarinics, β3-adrenoreceptor agonists, or combinations of these agents forms the mainstay of overactive bladder (OAB) management.To evaluate the efficacy and safety of combination therapy in patients with OAB.A literature search was conducted in June 2018 using Embase, MEDLINE, and Cochrane databases via Ovid and relevant congress abstracts. Studies reporting the efficacy/safety of two antimuscarinics or a β3-adrenoreceptor agonist plus an antimuscarinic were included.Publications reported on clinical efficacy, safety, and health-related quality of life (HRQoL) for mirabegron (M) plus solifenacin (S) from three 12-wk randomised controlled trials (RCTs)-SYMPHONY, SYNERGY, and BESIDE-and a 12-mo RCT, SYNERGY II. SYMPHONY reported statistically significant improvements in clinical symptoms and HRQoL with combination therapy versus solifenacin 5 mg (S5) and placebo. In SYNERGY, there were consistent improvements in urinary incontinence (UI) episodes/24 h and micturitions/24 h (coprimary endpoints), and in secondary efficacy parameters with mirabegron 25 mg (M25) + S5 and mirabegron 50 mg (M50) + S5 versus respective monotherapies. In patients with an inadequate response to S5 monotherapy (BESIDE), greater improvements in UI (primary endpoint) were noted for M50 + S5 versus S5 (p = 0.001). Combination therapy was noninferior to solifenacin 10 mg (S10) for reduction in UI and superior to S10 for improvement in micturition frequency (p 0.001), and resulted in greater improvements from baseline in OAB-5 Dimension scores versus S5 and S10 (p 0.01). In SYNERGY II, clinically meaningful and sustained improvements in clinical outcomes were observed for M50 + S5 versus M50 or S5. Combination therapy was well tolerated in all four trials. The incidence of adverse events (AEs) was similar across groups, and there were no notable differences in the incidence of specific AEs. Positive efficacy outcomes were observed in five studies of dual antimuscarinic therapy (trospium + solifenacin).Mirabegron plus solifenacin provides effective, well-tolerated treatment for patients with OAB. Limited data for dual antimuscarinic therapy suggest a benefit in patients with moderate-to-severe symptoms.Overactive bladder (OAB) is treated with medicines called antimuscarinics, such as solifenacin, propiverine, or trospium, or another β-adrenoreceptor agonist medicine called mirabegron, which works in a different way. We looked at published scientific studies of patients with OAB treated with mirabegron plus solifenacin together, or with two antimuscarinics. We found that mirabegron plus solifenacin can help reduce symptoms and improve quality of life. Patients tolerate this treatment well, with few patients experiencing side effects.
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- 2019
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47. Particulate Versus Non-Particulate Bulking Agents In The Treatment Of Stress Urinary Incontinence
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Christopher R. Chapple and Roger R. Dmochowski
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030219 obstetrics & reproductive medicine ,Sling (implant) ,business.industry ,Urology ,030232 urology & nephrology ,Urinary incontinence ,Particulates ,Host tissue ,03 medical and health sciences ,0302 clinical medicine ,medicine ,medicine.symptom ,business ,Biomedical engineering - Abstract
Stress urinary incontinence (SUI) has been treated surgically with the midurethral sling but in recent years, this option has come under scrutiny and the risk-benefit balance continues to be reviewed. The low-risk alternative for women with uncomplicated SUI is the bulking agent, which aims to achieve continence through coaptation of the urethra. Two classes of bulking agents can be identified: those made from solid microparticles in an absorbable liquid or gel carrier (particulate agents) and those comprising a homogenous gel (non-particulates) that resists absorption. Polydimethylsiloxane®, carbon-coated zirconium oxide®, calcium hydroxyapatite® and polyacrylate polyalcohol copolymer® are currently marketed particulate agents. With the exception of calcium hydroxyapatite, the particles are non-degradable. Each agent achieves its long-term bulking effect through reactive changes around the persisting particles while the carrier volume is lost. Bulkamid® is a non-particulate agent with the bulking effect resulting from the volume of gel injected. The lasting network of fine fibers formed by the host tissue anchors the gel in situ. Foreign-body granulomas, erosion and migration/material extrusion and loss of bulk have been observed in connection with the particle-based products. Bulkamid may be mechanistically less liable to these events; however, there are minimal data directly comparing the two types of bulking agent. The question of durability is inevitable based on their differing modes of action.
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- 2019
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48. Penile Paraffinoma
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Alison Pauline Downey, Nadir I. Osman, Altaf Mangera, Richard D. Inman, Sheilagh V. Reid, and Christopher R. Chapple
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Body Modification, Non-Therapeutic ,Male ,Penile Diseases ,Paraffin ,Urology ,Humans ,Foreign Bodies ,Injections - Abstract
Penile paraffinoma is a rare cause of penile mass that can occur following injection of liquid paraffin, performed illicitly for penile augmentation. Over the past 2 yr, we have observed an increasing number of cases presenting with the complications of penile paraffinoma; three patients of central European origin have required inpatient treatment at our institution and posed a significant management dilemma. This mini-review aims to review the literature on the aetiopathogenesis, clinical features, diagnosis, and management of penile paraffinoma. A systematic search of PubMed and Scopus was performed with 10 case series and 26 case reports identified between 1956 and 2017. A total of 124 cases, with a mean age of 36.29 yr, were identified. The majority originated in Korea, and the most common injected material was liquid paraffin (80.6%). Patients presented with pain/swelling, ulceration/fistulae, and penile deformity. The majority required surgical excision of paraffinoma followed by reconstruction with a variety of procedures including split skin grafting, scrotal skin flap reconstruction, and prepuce grafting. Mean duration of follow-up was 15.8 mo. Penile paraffinoma remains a rare presentation; however, it can present management difficulties. We have had an increase in cases, with three patients presenting with complications following injection of paraffin in our unit in the past 2 yr. Definitive management includes surgical excision and reconstruction as required with early involvement of plastic surgeons. There may be a role for conservative management; however, long-term outcomes are unclear. There may be a need for targeted preventative measures through public health agencies in communities where the practice is more prevalent. PATIENT SUMMARY: Penile paraffinoma can occur following injection of liquid paraffin or similar substances, generally used by non-healthcare personnel for the purpose of penile augmentations, and can cause significant pain, ulceration, and penile deformity. Definitive management includes surgical excision with reconstruction as required. Prevention of its use through awareness and education may be required in communities where the practice is more common.
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- 2019
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49. Structured Population-based Prostate-specific Antigen Screening for Prostate Cancer: The European Association of Urology Position in 2019
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Hendrik Van Poppel, Alberto Briganti, Christopher R. Chapple, Monique J. Roobol, Nicolas Mottet, Giorgio Gandaglia, James W.F. Catto, Peter Albers, Per Anders Abrahamsson, Manfred P. Wirth, Francesco Montorsi, Jens Sønksen, Urology, Gandaglia, G., Albers, P., Abrahamsson, P. -A., Briganti, A., Catto, J. W. F., Chapple, C. R., Montorsi, F., Mottet, N., Roobol, M. J., Sonksen, J., Wirth, M., and van Poppel, H.
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Male ,medicine.medical_specialty ,Colorectal cancer ,Biopsy ,Urology ,030232 urology & nephrology ,Medical Overuse ,Risk Assessment ,Causes of cancer ,03 medical and health sciences ,Prostate cancer ,0302 clinical medicine ,SDG 3 - Good Health and Well-being ,Prostate ,medicine ,Humans ,Multiparametric Magnetic Resonance Imaging ,Overdiagnosis ,Early Detection of Cancer ,Aged ,medicine.diagnostic_test ,business.industry ,Patient Selection ,Prostate Cancer ,Cancer-specific mortality ,Prostatic Neoplasms ,Cancer ,Rectal examination ,Middle Aged ,Prostate-Specific Antigen ,medicine.disease ,Prostate-specific antigen ,medicine.anatomical_structure ,Stage migration ,030220 oncology & carcinogenesis ,Screening ,business - Abstract
Prostate cancer (PCa) is one of the first three causes of cancer mortality in Europe. Screening in asymptomatic men (aged 55–69 yr) using prostate-specific antigen (PSA) is associated with a migration toward lower staged disease and a reduction in cancer-specific mortality. By 20 yr after testing, around 100 men need to be screened to prevent one PCa death. While this ratio is smaller than for breast and colon cancer, the long natural history of PCa means many men die from other causes. As such, the nonselective use of PSA testing and radical treatments can lead to overdiagnosis and overtreatment. The European Association of Urology (EAU) supports measures to encourage appropriate PCa detection through PSA testing, while reducing overdiagnosis and overtreatment. These goals may be achieved using personalized risk-stratified approaches. For diagnosis, the greatest benefit from early detection is likely to come in men assessed using baseline PSA levels at the age of 45 yr to individualize screening intervals. Multiparametric magnetic resonance imaging as well as risk calculators based on family history, ethnicity, digital rectal examination, and prostate volume should be considered to triage the need for biopsy, thus reducing the risk of overdiagnosis. For treatment, the EAU advocates balancing patient's life expectancy and cancer's mortality risk when deciding an approach. Active surveillance is encouraged in well-informed patients with low-risk and some intermediate-risk cancers, as it decreases the risks of overtreatment without compromising oncological outcomes. Conversely, the EAU advocates radical treatment in suitable men with more aggressive PCa. Multimodal treatment should be considered in locally advanced or high-grade cancers. Patient summary: Implementation of prostate-specific antigen (PSA)-based screening should be considered at a population level. Men at risk of prostate cancer should have a baseline PSA blood test (eg, at 45 yr). The level of this test, combined with family history, ethnicity, and other factors, can be used to determine subsequent follow-up. Magnetic resonance imaging scans and novel biomarkers should be used to determine which men need biopsy and how any cancers should be treated. The European Association of Urology supports the implementation of prostate-specific antigen (PSA)-based screening at a population level in Europe. Men at risk of prostate cancer should have a baseline PSA blood test (eg, at 45 yr). This, together with family history, ethnicity, and other factors, should be used to determine subsequent follow-up. Magnetic resonance imaging scans and novel biomarkers should be used to determine which men need biopsy and how any cancers should be treated.
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- 2019
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50. Current state of urethral tissue engineering
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Kyle J. Wilson, Naside Mangir, Christopher R. Chapple, and Nadir I. Osman
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medicine.medical_specialty ,Urethral stricture ,Urology ,Urethroplasty ,medicine.medical_treatment ,030232 urology & nephrology ,Anastomosis ,Translational Research, Biomedical ,03 medical and health sciences ,0302 clinical medicine ,Urethra ,medicine ,Animals ,Humans ,Oral mucosa ,Urethral Stricture ,Tissue Engineering ,business.industry ,Mouth Mucosa ,medicine.disease ,Urethra surgery ,Surgery ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Failed urethrotomy ,business - Abstract
Urethrotomy remains the first-line therapy in the treatment of a urethral stricture despite data showing no real chance of a cure after repeated urethroplasties. An anastomotic or an augmentation urethroplasty with oral mucosa should be offered to patients with a failed urethrotomy. The availability of grafts can be a concern for both patients and surgeons. The potential for a tissue-engineered solution has been explored in recent years and is explored in this article.More than 80 preclinical studies have investigated a tissue-engineered approach for urethral reconstruction mostly using decellularized natural scaffolds with or without cell seeding. The animal models used in preclinical testing are not representative of disease processes seen with strictures in man. The available clinical studies were of small sample size and lacked control groups. The choice of biomaterial were mostly acellular matrices derived from natural extracellular matrix. The reported success rates in the pilot clinical studies were highly variable.The research with tissue engineering of the urethra has not yet been translated into a clinically available material. This is an area where much more research is needed and we would conclude that it is an area of unmet clinical need where users of tissue-engineered urethra in the future need to carry out a rigorous basic science programme and need to be cautious in drawing conclusions based on initial experience and report on long-term clinical results.
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- 2019
- Full Text
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