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In the field of minimally invasive surgery, there is a constant drive to devise and execute the most minimally invasive surgeries possible. By the very nature of laparoscopy and robotic surgery, what one can accomplish with several ports of a given size will invariably be studied and attempted with fewer ports and with ports of smaller sizes. After researching the literature, we were not able to find any single port hysterectomies performed through a port size of smaller than 15 mm. We were able to perform, described here, a technique for performing laparoscopic hysterectomy through a single port of only 11 mm in diameter. We illustrate the technique in the accompanying video and believe the technique to be safe and reproducible. [ABSTRACT FROM AUTHOR]

To describe the evolution of robotic laparoendoscopic single-site radical prostatectomy (R-LESS-RP) performed with the daVinci Single-Site Platform® and a home-made multiport aimed to overcome classical drawbacks of LESS, still present with this platform. Between 09/2015 and 06/2017 12 patients underwent R-LESS RP for clinical localized prostate cancer. Following a "phase 1 (development-stage)" innovation, development, exploration, assessment, long-term study (IDEAL) framework, different solutions were drawn to overcome drawbacks of daVinci Single-Site Platform®, included 3 (A, B, and C) multi-ports developed and evaluated in term of advantages/drawbacks concerning ergonomy. The end points of this study were: feasibility, safety, efficacy, by reporting rational description of multiports configuration, demographics, perioperative variables, functional and oncological results. Semi-flexible robotic 5-mm needle-holder instead of Maryland forceps, 30° lenses up and barbed-suture allowed overcoming limits of robotic-platform. Multiport-C (GelPOINT Advanced-Access® and an extra 8-mm robotic trocar outside the multiport) showed the best compromise to ensure both surgeon and bed-side assistant to reproduce a standard robotic procedure. No conversion to either standard robotic or open technique or intraoperative complications occur in any case. Two patients experienced "high-grade" Clavien-Dindo complications. After 12.4 months follow-up, all patients were continent without any sign of biochemical relapse and among 5 preoperative potent patients submitted to nerve-sparing dissection, 4 reported good erectile-function. R-LESS-RP is feasible and safe in the hands of experienced minimally-invasive surgeons. Do date, we recommend a hybrid solution with a home-made multiport and use of an additional standard robotic trocar which allows the use endowrist® technology instruments. [ABSTRACT FROM AUTHOR]

Objective: To proposed a novel method for a difficult laparoscopic hysterectomy that spares the cervical ligaments and eliminates the cervical canal and transformation zone of the cervix. Case report: A 40-year-old women, gravida 3 para 3, who had had a cesarean delivery previously, was referred to the gynecology clinic due to adenomyosis with menorrhagia and severe anemia. Ultrasonography showed that the uterus was enlarged to 13.5 cm × 10.7 cm × 8.8 cm. After obtaining informed consent, a two-phase laparoendoscopic single-site (LESS) cervical ligaments-sparing hysterectomy was performed smoothly. The patient discharged on 4th day and resumed her sexual life less than 2 months after surgery. Conclusion: This novel minimal invasive method of hysterectomy makes difficulty laparoscopic hysterectomy easy and safe. Preservation of cervical ligaments retains stability in the pelvic floor and may reduce intraoperative complications and subsequent pelvic floor organ prolapse.

Objective: Vesicovaginal fistula (VVF) is a major complication with psychosocial ramifications. In literature, few VVF cases have been managed by laparoendoscopic single site surgery (LESS) and for the 1st time we report VVF repair by LESS using conventional laparoscopic instruments. We present our initial experience and to assess its feasibility, safety and outcome. Patients and Methods: From March 2012 to September 2015, LESS VVF repair was done for ten patients aged between 30 and 65 (45.6 ± 10.15) years, who presented with supratrigonal VVF. LESS was performed by modified O'Conor technique using regular trocars with conventional instruments. Data were collected regarding feasibility, intra- or post-operative pain, analgesic requirement, complication, and recovery. Results: All 10 cases were completed successfully, without conversion to a standard laparoscopic or open approach. The mean operative time was 182.5 ± 32.25 (150–250) min. The mean blood loss was 100 mL. The respective mean visual analog score for pain on day 1, 2, and 3 was 9.2 ± 1, 5 ± 1, and 1.4 ± 2.3. The analgesic requirement in the form of intravenous tramadol on days 1, 2, and 3 was 160 ± 51.6, 80 ± 63.2, and 30 ± 48.3, mgs respectively. No major intra- or post-operative complications were observed. The mean hospital stay was 2.6 ± 0.7 (2–4) days. Conclusion: In select patients, LESS extravesical repair of VVF using conventional laparoscopic instruments is safe, feasible with all the advantages of single port surgery at no added cost. Additional experience and comparative studies with conventional laparoscopy are warranted.

We aimed to review studies comparing the outcomes of the laparoendoscopic single site (LESS) pyeloplasty with those of conventional laparoscopic pyeloplasty (CLP). A systematic review of the literature was performed according to the PRISMA (preferred reporting items for systematic reviews and meta-analysis) criteria. The methodological quality of the studies was rated according validated scales. The level of evidence (LE) was reported as described by the Oxford criteria. Preoperative demographic parameters and perioperative outcomes between the two surgical techniques were assessed. A meta-analysis of the included studies was performed. A total of 5 studies were elected for the analysis, including 164 cases, 70 (42.6%) of them being LESS and 94 (57.4%) being CLP. Four studies were observational retrospective comparative studies (LE: 3a-4); one was a prospective randomized controlled trial (LE: 2b). There was no significant difference in age, body mass index, gender, side and presence of the crossing vessel, between the groups. There was no significant difference regarding the operative time (weight mean difference [WMD]: −7.02; 95% confidence interval [CI]: −71.82-57.79; P = 0.83) and length of hospital stay (WMD: 0.04; 95% CI: −0.11-0.20; P = 0.58), whereas the estimated blood loss was statistically lower for LESS (WMD: −16.83; 95% CI: −31.79-−1.87; P = 0.03). The postoperative use of analgesic favored the LESS group but without reaching statistical significance (WMD: −7.52; 95% CI: −17.56-2.53; P = 0.14). In conclusion, LESS pyeloplasty offers comparable surgical and functional outcomes to CLP while providing the potential advantages of less blood loss and lower analgesic requirement. Thus, despite being more technically challenging, LESS pyeloplasty can be regarded as a minimally invasive approach for patients seeking fewer incisional scars.

The last two decades witnessed the inception and exponential implementation of key technological advancements in laparoscopic urology. While some of these technologies thrived and became part of daily practice, others are still hindered by major challenges. This review was conducted through a comprehensive literature search in order to highlight some of the most promising technologies in laparoscopic visualization, augmented reality, and insufflation. Additionally, this review will provide an update regarding the current status of single-site and natural orifice surgery in urology.

Objective : To analyze our experience of 87 cases with single port surgery, which is also known as laparoendoscopic single site surgery (LESS). Materials and Methods: Case records of all LESS procedures performed between December 2007 and June 2010 were analysed. The procedures performed were donor nephrectomy (n=45), simple nephrectomy (n=27), radical nephrectomy (n=5), pyeloplasty (n=9), and ureteroneocystostomy (n=1). Parameters analysed were operating room (OR) time, estimated blood loss (EBL), visual analogue score (VAS), and complications in all patients undergoing LESS procedure and additionally, warm ischaemia time (WIT) and graft outcome in patients undergoing LESS donor nephrectomy. In reconstructive procedures, the functional assessment was performed with a diuretic renogram at 6 months. Results: In LESS donor nephrectomy, the mean WIT was 6.9 ± 1.9 min. Mean serum creatinine in recipients at 1 month was 0.96 ± 0.21 mg%. We encountered one instance each of renal artery injury, renal vein injury, large bowel injury, minor cortical laceration at the upper pole and two instances of diaphragmatic injury. In LESS simple nephrectomy, the average OR time was 148.7 ± 52.2 min and hospital stay was 3.7 ± 1.2 days. There was one instance of large bowel injury during specimen retrieval. In LESS radical nephrectomy, the average OR time was 202.5 ± 35.7 min and average hospital stay was 4.2 ± 1.3 days. 6 patients of LESS pyeloplasty completed follow up with a diuretic renogram showing a good drainage. LESS ureteroneocystostomy could also be performed successfully without any complications. Conclusion: LESS surgery can be accomplished safely in nephrectomy and reconstructive procedures such as pyeloplasty and ureteroneocystostomy with equivalent outcomes as standard laparoscopy and with added benefits of cosmesis and quicker convalescence. LESS donor nephrectomy is a technically feasible procedure; current status of procedure needs to be proved with randomised controlled studies.

The aim of this review was to assess the results of published experience with bariatric SILS surgery, with a particular focus on treatment feasibility and safety. An EMBASE and MEDLINE database search was performed identifying 13 articles totalling 87 patients in the laparoscopic adjustable gastric banding (LAGB) group, 10 patients in the laparoscopic sleeve gastrectomy (LSG) group, and 1 patient in the Roux-en-Y SILS group. In most series the learning curve was steep and operating times halved with time, reaching 53 min for LAGB and 90 min for LSG. In single case reports using strict selection criteria patients were discharged up to 24 hours following surgery. Treatment safety was satisfactory. Only two studies reported some minor complications with rates of up to 9.8%, including port malposition, port site infection, and seroma or haematoma formation. There were no complications in other studies. LAGB, LSG and Roux-en-Y surgeries were feasible although technically demanding and difficult.

Minimally Invasive Single Site (MISS) surgery is a better terminology to explain the novel concept of scarless surgery, which is increasingly making its way into clinical practice. But, there are some difficulties. We review the existing technologies for MISS surgery with regards to single-port devices, endoscope and camera, instruments, retractors and also the future perspectives for the evolution of MISS surgery. While we need to move ahead cautiously and wait for the development of appropriate technology, we believe that the "Ultimate form of Minimally Invasive Surgery" will be a hybrid form of MISS surgery and Natural Orifice Transluminal Endoscopic Surgery, complimented by technological innovations from the fields of robotics and computer-assisted surgery.

Recent advances in urology have included natural orifice translumenal endoscopic surgery (NOTES) and laparoendoscopic single-site surgery (LESS). These techniques seek to minimize morbidity by reducing the number of transabdominal port sites, but this comes at a cost of decreased instrument agility and other technical challenges that have prevented LESS and NOTES from entering mainstream urologic practice. Magnetic anchoring and guidance systems (MAGS) consist of instruments that are inserted laparoscopically through an entry in the peritoneal cavity at one point and then driven into position elsewhere and controlled with magnets. These instruments improve the ergonomics of minimally invasive surgery and may help make LESS and NOTES more accessible to urologists across experience levels.

Objective: Vesicovaginal fistula (VVF) is a major complication with psychosocial ramifications. In literature, few VVF cases have been managed by laparoendoscopic single site surgery (LESS) and for the 1st time we report VVF repair by LESS using conventional laparoscopic instruments. We present our initial experience and to assess its feasibility, safety and outcome. Patients and Methods: From March 2012 to September 2015, LESS VVF repair was done for ten patients aged between 30 and 65 (45.6 ± 10.15) years, who presented with supratrigonal VVF. LESS was performed by modified O'Conor technique using regular trocars with conventional instruments. Data were collected regarding feasibility, intra- or post-operative pain, analgesic requirement, complication, and recovery. Results: All 10 cases were completed successfully, without conversion to a standard laparoscopic or open approach. The mean operative time was 182.5 ± 32.25 (150-250) min. The mean blood loss was 100 mL. The respective mean visual analog score for pain on day 1, 2, and 3 was 9.2 ± 1, 5 ± 1, and 1.4 ± 2.3. The analgesic requirement in the form of intravenous tramadol on days 1, 2, and 3 was 160 ± 51.6, 80 ± 63.2, and 30 ± 48.3, mgs respectively. No major intra- or post-operative complications were observed. The mean hospital stay was 2.6 ± 0.7 (2-4) days. Conclusion: In select patients, LESS extravesical repair of VVF using conventional laparoscopic instruments is safe, feasible with all the advantages of single port surgery at no added cost. Additional experience and comparative studies with conventional laparoscopy are warranted. [ABSTRACT FROM AUTHOR]

We aimed to review studies comparing the outcomes of the laparoendoscopic single site (LESS) pyeloplasty with those of conventional laparoscopic pyeloplasty (CLP). A systematic review of the literature was performed according to the PRISMA (preferred reporting items for systematic reviews and meta-analysis) criteria. The methodological quality of the studies was rated according validated scales. The level of evidence (LE) was reported as described by the Oxford criteria. Preoperative demographic parameters and perioperative outcomes between the two surgical techniques were assessed. A meta-analysis of the included studies was performed. A total of 5 studies were elected for the analysis, including 164 cases, 70 (42.6%) of them being LESS and 94 (57.4%) being CLP. Four studies were observational retrospective comparative studies (LE: 3a-4); one was a prospective randomized controlled trial (LE: 2b). There was no significant difference in age, body mass index, gender, side and presence of the crossing vessel, between the groups. There was no significant difference regarding the operative time (weight mean difference [WMD]: -7.02; 95% confidence interval [CI]: -71.82-57.79; P = 0.83) and length of hospital stay (WMD: 0.04; 95% CI: -0.11-0.20; P = 0.58), whereas the estimated blood loss was statistically lower for LESS (WMD: -16.83; 95% CI: -31.79--1.87; P = 0.03). The postoperative use of analgesic favored the LESS group but without reaching statistical significance (WMD: -7.52; 95% CI: -17.56-2.53; P = 0.14). In conclusion, LESS pyeloplasty offers comparable surgical and functional outcomes to CLP while providing the potential advantages of less blood loss and lower analgesic requirement. Thus, despite being more technically challenging, LESS pyeloplasty can be regarded as a minimally invasive approach for patients seeking fewer incisional scars. [ABSTRACT FROM AUTHOR]

Introduction: Single-port laparoscopy (SPL) employs a 1.5- to 2.5-cm incision at the umbilicus for the placement of a single working port. We hypothesized that the longer incision created by SPL compared with multiport laparoscopy may increase the incidence of trocar-site hernias. We examined our experience with SPL in bariatric operations. Methods: There were 734 laparoscopic sleeve gastrectomy and laparoscopic adjustable gastric banding procedures performed at our institution between 2001 and 2011. Fifty-eight patients were lost to follow-up or had a short duration of follow-up (<1 month). Of the remaining 676 cases, 163 were performed via SPL. All laparoscopic wounds created by trocar size greater than 12 mm were closed with absorbable suture. Results: Patient demographics of the SPL group and the multiport group were similar in terms of age, gender, and comorbidities. The average body mass index (BMI) of the SPL group was lower than the multiport group (43.5 ± 5.3 vs. 45.8 ± 7.7, p < 0.01). The mean follow-up for the SPL group was 11 months versus 24 months for the multiport group. There were three trocar-site hernias out of 513 cases in the multiport compared to one hernia out of 163 cases in the SPL group (0.6 vs. 0.6 %, p = 0.967). All trocar-site hernias occurred at the 15-mm port site. The median time to hernia occurrence for the multiport group was 13 months (range, 1-18). In the SPL group, the hernia occurred at 8 months. On multivariate analysis, age, BMI, SPL, procedure type, and the postoperative weight loss were not associated with the development of trocar-site hernias. Conclusions: SPL did not increase the rate of trocar-site hernia in this series. A low rate of trocar-site hernia can be achieved with the use of SPL in bariatric surgery. [ABSTRACT FROM AUTHOR]

Background: This report details our experience with laparoendoscopic single site (LESS) fundoplication for GERD and provides a comparison to earlier contiguous patients undergoing conventional laparoscopic fundoplication. Methods: With institutional review board approval, symptoms before and after LESS fundoplications and conventional laparoscopic fundoplications were scored by patients. Outcomes after 130 consecutive LESS fundoplications were compared to 130 contiguous consecutive outcomes after conventional laparoscopic fundoplications. Results: Patients undergoing conventional laparoscopic vs. LESS fundoplication were very similar. There were no conversions to 'open' operations and no notable complications with LESS fundoplication. Symptom reduction was broad and dramatic for patients undergoing LESS or conventional laparoscopic fundoplication; 96 % of patients who underwent LESS fundoplication scored their incision as ≥8 (1 = revolting to 10 = beautiful). Conclusions: Relative to conventional laparoscopy, LESS surgery provides excellent resolution of symptoms without an apparent scar. In comparison to conventional laparoscopy, LESS fundoplication is as safe with similar symptom improvement and superior cosmesis. [ABSTRACT FROM AUTHOR]

Study Type - Therapy (case series) Level of Evidence 4 What's known on the subject? and What does the study add? Over the last few years, minimally invasive urological surgery has evolved towards less invasive, 'scarless' procedures. New surgical concepts, such as those of natural orifice transluminal endoscopic surgery (NOTES) and laparoendoscopic single-site surgery (LESS) have been introduced. Mini-laparoscopy has been rediscovered in an attempt to reduce the invasiveness of standard laparoscopy. This study is the first to compare the perception of surgeons when first facing three different scarless options for performing a porcine nephrectomy and when dealing with the constraints of each technique. The study findings suggest that: (i) when first approaching these techniques, surgeons tend to perform equally well under expert guidance in the porcine model; (ii) mini-laparoscopy is perceived as less difficult to perform; (iii) for all the techniques, surgeon's impressions are in line with their expectations. OBJECTIVE To evaluate the perception and performance of urological surgeons when first applying scarless surgical techniques., METHODS The study was conducted during the 2nd Minimally Invasive Urological Surgical Week annual course in Braga, Portugal., Fourteen attendees performed three porcine nephrectomies by using each of the following techniques: mini-laparoscopy, laparoendoscopic single-site surgery (LESS) and natural orifice transluminal endoscopic surgery (NOTES)-assisted laparoscopy., Peri-operative data were recorded, and operating performance was scored by one experienced surgeon for each working station, using a global rating scale., The surgeons' subjective perceptions of degree of difficulty were graded and their expectations before the procedures were recorded., RESULTS Forty-two porcine nephrectomies were performed., There were no differences in overall operating time, or time to dissect and manage the renal vascular hilum, whereas time to gain access was faster for LESS than for mini-laparoscopy or NOTES-assisted laparoscopy (mean [ sd] 8 [6] min vs 10.2 [5.3] min vs 9.9 [5.3] min, respectively; P= 0.59)., A better visualization of the surgical field was obtained with mini-laparoscopy and there was a higher degree of difficulty of bimanual dexterity for LESS, but no significant differences were found among the three techniques for any variable (operating field view: P= 0.52; bimanual dexterity: P= 0.49; efficiency: P= 0.77; tissue handling: P= 0.61; autonomy: P= 0.2)., Subjective perception of the degree of difficulty trended in favour of mini-laparoscopy ( P= 0.17), but no significant difference was found in terms of surgeons' impression as compared with their expectations ( P= 0.34)., CONCLUSIONS When first approaching new scarless techniques, surgeons tend to perform equally well under expert guidance in the porcine model., Mini-laparoscopy is perceived as less difficult to perform and, for all the techniques, surgeons' impressions are in line with their expectations. [ABSTRACT FROM AUTHOR]

OBJECTIVE: To analyze our experience of 87 cases with single port surgery, which is also known as laparoendoscopic single site surgery (LESS). MATERIALS AND METHODS: Case records of all LESS procedures performed between December 2007 and June 2010 were analysed. The procedures performed were donor nephrectomy (n=45), simple nephrectomy (n=27), radical nephrectomy (n=5), pyeloplasty (n=9), and ureteroneocystostomy (n=1). Parameters analysed were operating room (OR) time, estimated blood loss (EBL), visual analogue score (VAS), and complications in all patients undergoing LESS procedure and additionally, warm ischaemia time (WIT) and graft outcome in patients undergoing LESS donor nephrectomy. In reconstructive procedures, the functional assessment was performed with a diuretic renogram at 6 months. RESULTS: In LESS donor nephrectomy, the mean WIT was 6.9 ± 1.9 min. Mean serum creatinine in recipients at 1 month was 0.96 ± 0.21 mg%. We encountered one instance each of renal artery injury, renal vein injury, large bowel injury, minor cortical laceration at the upper pole and two instances of diaphragmatic injury. In LESS simple nephrectomy, the average OR time was 148.7 ± 52.2 min and hospital stay was 3.7 ± 1.2 days. There was one instance of large bowel injury during specimen retrieval. In LESS radical nephrectomy, the average OR time was 202.5 ± 35.7 min and average hospital stay was 4.2 ± 1.3 days. 6 patients of LESS pyeloplasty completed follow up with a diuretic renogram showing a good drainage. LESS ureteroneocystostomy could also be performed successfully without any complications. CONCLUSION: LESS surgery can be accomplished safely in nephrectomy and reconstructive procedures such as pyeloplasty and ureteroneocystostomy with equivalent outcomes as standard laparoscopy and with added benefits of cosmesis and quicker convalescence. LESS donor nephrectomy is a technically feasible procedure; current status of procedure needs to be proved with randomised controlled studies. [ABSTRACT FROM AUTHOR]

Purpose: To compare the short-term outcomes of single-incision and conventional three-incision laparoscopic appendectomy (LA) at a single surgical unit. Methods: We conducted a retrospective study comparing the operative outcomes of two LA techniques between January 2009 and November 2010. Results: LA was performed successfully in 44 patients: through a single incision in 27 patients and through three incisions in 17 patients. The time taken to resume oral intake was slightly less in the single-incision group than in the three-incision group, at 1.1 versus 1.5 days, respectively ( P = 0.0419). However, blood loss and hospital stay were not significantly different, at 7.2 versus 6.4 ml ( P = 0.6244) and 3.7 versus 3.8 days ( P = 0.8565), respectively. The cosmetic result was better in the single-incision group, because of the well-concealed scar. Conclusion: Both single-incision and conventional LA are effective and minimally invasive, and should be performed according to the experience of the surgeon. Single-incision LA results in faster recovery, but larger studies are required to confirm this and to determine if these techniques can be used safely for all indications of appendectomy. [ABSTRACT FROM AUTHOR]

OBJECTIVE • To compare laparoendoscopic single-site (LESS) and standard laparoscopic pyeloplasty procedures with the aim of defining whether perioperative, recovery or health-related quality of life (HRQL) benefits exist for the LESS procedure. PATIENTS AND METHODS • From November 2007 to August 2008, sixteen patients underwent LESS pyeloplasty at a tertiary care referral centre. These patients were compared with a matched cohort of patients undergoing standard laparoscopic pyeloplasty. • Matching criteria included gender and age (within 10 years), as well as preoperative degree of obstruction ( T1/2 within 15 min) and differential renal function (within 10% ipsilaterally) based on diuretic radionuclide scanning. Mean follow-up was 13 ± 4 months for the LESS group and 17 ± 3 months for the standard laparoscopic group. • LESS pyeloplasty procedures were all performed using a single-port device in the umbilicus and suturing was assisted with a 2-mm grasping instrument. Perioperative variables, successful relief of obstruction and HRQL measurements were compared between the two groups. RESULTS • Except for a lower body mass index in the LESS group (23 ± 6 kg/m2 vs 30 ± 7 kg/m2, P = 0.002), no difference was noted for perioperative variables between the two cohorts, including hospital stay and analgesic requirement. • No significant HRQL advantage was noted for either group based on a six-item nonvalidated questionnaire. • All patients in both groups experienced clinical resolution of their symptoms. A patient in the standard laparoscopy group and two patients in the LESS group had T1/2 > 20 min (0.063% vs 0.125%, P = 1.00) on diuretic radionuclide scanning. • Limitations include the retrospective nature of the present study, as well as the relatively small study population and short follow-up. CONCLUSIONS • No benefit was noted for LESS pyeloplasty over the standard laparoscopic procedure beyond aesthetic advantages. • Further comparisons are needed to determine whether these results are generalizable to other LESS procedures. [ABSTRACT FROM AUTHOR]

Background: The Magnetic Anchoring and Guidance System (MAGS) includes an external magnet that controls intra-abdominal surgical instruments via magnetic attraction forces. We have performed NOTES (Natural Orifice Transluminal Endoscopic Surgery) and LESS (Laparoendoscopic Single Site) procedures using MAGS instruments in porcine models with up to 2.5-cm-thick abdominal walls, but this distance may not be sufficient in some humans. The purpose of this study was to determine the maximal abdominal wall thickness for which the current MAGS platform is suitable. Methods: Successive iterations of prototype instruments were developed; those evaluated in this study include external (134-583 g, 38-61 mm diameter) and internal (8-39 g, 10-22 mm diameter) components using various grades, diameters, thicknesses, and stacking/shielding/focusing configurations of permanent Neodymium-iron-boron (NdFeB) magnets. Nine configurations were tested for coupling strength across distances of 0.1-10 cm. The force-distance tests across an air medium were conducted at 0.5-mm increments using a robotic arm fitted with a force sensor. A minimum theoretical instrument drop-off (decoupling) threshold was defined as the separation distance at which force decreased below the weight of the heaviest internal component (39 g). Results: Magnetic attraction forces decreased exponentially over distance. For the nine configurations tested, the average forces were 3,334 ± 1,239 gf at 0.1 cm, 158 ± 98 gf at 2.5 cm, and 8.7 ± 12 gf at 5 cm; the drop-off threshold was 3.64 ± 0.8 cm. The larger stacking configurations and magnets yielded up to a 592% increase in attraction force at 2.5 cm and extended the drop-off threshold distance by up to 107% over single-stack anchors. For the strongest configuration, coupling force ranged from 5,337 gf at 0.1 cm to 0 gf at 6.95 cm and yielded a drop-off threshold distance of 4.78 cm. Conclusions: This study suggests that the strongest configuration of currently available MAGS instruments is suitable for clinically relevant abdominal wall thicknesses. Further platform development and optimization are warranted. [ABSTRACT FROM AUTHOR]

The use of laparoscopy can be associated with improved cosmesis following a variety of gastrointestinal procedures versus standard open surgery. The placement of laparoscopic ports in less visible areas of the body such as the bikini line, termed alternative port site selection (APSS), may result in further improved cosmesis. Performance of laparoscopic procedures from such alternative port placement areas may be associated with increased technical challenge. This manuscript discusses APSS approaches for two common laparoscopic procedures, cholecystectomy and gastric banding. Familiarity and implementation of these techniques can allow select patients to undergo procedures with less visible scarring and is less challenging than laparoscopic single site approaches. [ABSTRACT FROM AUTHOR]

Abstract: Background: Laparoscopic gastric banding is commonly performed using 5–6 abdominal trocars with enlargement of the largest trocar for implantation of the subcutaneous port. The aim of the present study was to compare the outcomes of conventional laparoscopic gastric banding with those of gastric banding performed through a single or duel incision. Methods: From April 2008 to May 2009, 23 patients underwent laparoscopic gastric banding through a single, 3.5–4.5-cm incision with implantation of the port through the same incision. The 2 study cohorts were matched for age, gender, and body mass index. The outcome measures included the operative time, blood loss, need for conversion to 5-trocar laparoscopy, and perioperative morbidity. Results: Each group included 6 men and 17 women. No significant differences were found between the 2 groups with regard to preoperative body mass index (40 versus 39 kg/m2), operative time, blood loss, or length of hospital stay. Of the 23 patients in the single incision group, 3 (13%) required conversion to conventional 5-trocar laparoscopy. No intraoperative or postoperative complications developed in either group. Conclusion: The present results have shown that in a subset of patients with a lower body mass index, adjustable gastric banding performed through a single laparoscopic incision is technically feasible and safe and does not prolong the operative time. The procedure can be performed with mostly existing ports, laparoscopic instrumentation, and visualization platforms. A prospective randomized trial is necessary to determine the clinical advantages of this less-invasive technique. [ABSTRACT FROM AUTHOR]

Abstract: A 53-yr-old woman presented with abdominal pain. Ultrasonography, computed tomography, and an endocrinologic work-up revealed a 4-cm nonfunctional left adrenal mass. A TriPort laparoscopic adrenalectomy was performed. The TriPort was inserted through a 3-cm subcostal incision. Using 5-mm instruments, a left adrenalectomy was performed. The specimen was dissected (harmonic scalpel) and extracted through a 10-mm bag. A TriPort adrenalectomy was successfully completed in 240min (blood loss: 20ml). The postoperative period was uneventful (discharge within 3 d). In our opinion, the TriPort adrenalectomy is feasible and safe, with favourable perioperative and short-term outcomes and a delighted patient at the 8-mo follow-up. [Copyright &y& Elsevier]

Objective: To present our initial experience using single access laparoscopic surgery for the treatment of benign adnexal pathologies.Methods: Sixteen patients with benign adnexal pathologies underwent salpingoophorectomy (n=9), ovarian cyst enucleation (n=5), or salpingectomy (n=2) using a laparoendoscopic single site approach with a new multiport reusable trocar and flexible and curved-as well as standard-laparoscopic instruments.Results: Conversion to a multi-access standard laparoscopic technique was not required in any patient and no intraoperative complications were observed. Postoperatively, one umbilical scar infection was detected. Mean operative time was 42 minutes.Conclusion: Laparoscopic single site enucleation for adnexal pathologies is feasible, safe, and effective, and has good results for cosmetic appearance and postoperative pain. Use of specialized instruments and standardization of the technique affect surgical ergonomy and operating time. [ABSTRACT FROM AUTHOR]

Robotic pyeloplasty has become more prevalent with the evolution and dissemination of robotic surgery. The da Vinci SP robotic platform is a new technology that has allowed for true single port surgery, compared to the previous multiport robotic platforms. As the SP has been utilized for an increasing number of urologic procedures, it can also be successfully used for pyeloplasty. Herein, we describe our technique and tips for performing a da Vinci SP pyeloplasty in the adult population., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/tau.2019.11.08). The series “Robotic-assisted Urologic Surgery” was commissioned by the editorial office without any funding or sponsorship. MTG: Consultant for Intuitive Surgical. The other authors have no other conflicts of interest to declare., (2020 Translational Andrology and Urology. All rights reserved.)

Background and Objectives: Laparoendoscopic single site surgery (LESS), a minimally invasive procedure, is performed in many hospitals. Although its cosmetic superiority is widely touted, some authors have disputed this view. Here, we compare the surgical and long-term cosmetic outcomes of and patient satisfaction with postoperative wounds for LESS and over 2-port laparoscopy (OTPL), including 2-port laparoscopy (TPL) and standard laparoscopy (SL), after a 6-mo follow-up period., Methods: A total of 125 patients who underwent adnexal surgery performed by the same surgeon at the same institution between March 2005 and May 2017 were included. The patients were divided into 2 groups: the LESS group and the OTPL group. The patients completed an evaluation using the Patient Scar Assessment Scale (PSAS, used to evaluate linear scars) and the Ultimate Question (UQ, used to determine overall patient satisfaction). We evaluated surgical scars using the Observer Scar Assessment Scale, which includes the Umbilical Scar Overall Shape Assessment Scale (USOSAS) and the Vancouver Scar Scale (VSS)., Results: There were no significant differences in the PSAS, UQ, USOSAS, and VSS results between the study groups. The USOSAS score was consistently correlated with VSS scores of 2, 3, and 4 and the total VSS score, indicating that the USOSAS score may be as effective as the VSS score., Conclusions: Because the long-term patient satisfaction with and cosmetic wound outcomes of LESS were not significantly different from those achieved by OTPL, surgeons should consider performing LESS after weighing the pros and cons with regard to the patient's condition., Competing Interests: Conflicts of Interest: The author has no conflict of interest directly relevant to the content of this article., (© 2019 by JSLS, Journal of the Society of Laparoendoscopic Surgeons.)

Objective: To compare postoperative pain after single port laparoscopy (SPL) approach with conventional laparoscopy (CL) in case of adnexectomy., Material and Methods: This is a retrospective monocentric study involving patients who underwent adnexal surgery by SPL or CL for a suspected benign disease or as a preventive measure. The main outcome measure was the level of postoperative pain., Results: A total of 87 patients were enrolled. Within 2h, the numerical scale (NS) was 1.9 in SPL group and 2.0 in the CL group (P=0.85). The next day, the NS was 1.8 in SPL group and 1.5 in CL group (P=0.55). The operating time was significantly shorter in SPL group (33 versus 56min, 95% CI [-31; -15], P<0.001) and no rupture of ovarian cysts occurred in this group. There was no significant difference concerning complications, length of hospital stay, general satisfaction and POSAS (Patient and Observer Scar Assessment Scale) score., Conclusion: This study confirms the feasibility of single-port laparoscopic adnexectomy. We have not shown significant difference in postoperative pain but the operating time was significantly reduced under the guise of an experienced surgeon., (Copyright © 2018. Published by Elsevier Masson SAS.)

Objective: To investigate clinical outcomes of laparoendoscopic single-site ovarian cystectomy compared with traditional multi-port laparoscopic ovarian cystectomy. Methods: Data of 81 patients with ovarian cystectomy from January 2016 to May 2017, the single-site group ( n= 40) and the multi-port group ( n= 41) in Peking Union Medical College Hospital were retrospectively collected. The outcomes of single-site and multi-port groups were analyzed and compared, including: postoperative fever, operation time, blood loss, hemoglobin change, surgical complications, postoperative pain score, postoperative analgesic requirements, body image scale and cosmetic score, length of hospital stay, postoperative total cost. Results: No complication was found in two groups. No difference was found in postoperative fever, blood loss, hemoglobin change, postoperative pain score, length of hospital stay, and total cost between the two groups (all P> 0.05). Operation time was (50±20) minutes in single-site group, and (40±15) minutes in multi-port group; postoperative analgesic requirements was 28%(11/40) in single-site group, and 7%(4/41) in multi-port group; cosmetic score was 22.6±2.6 in single-site group, and 17.3±2.6 in multi-port group; body image scale was 5.7±1.2 in single-site group, and 6.2±1.2 in multi-port group; these four clinical parameters were statistical differences (all P< 0.05). Conculsion: Laparoendoscopic single-site ovarian cystectomy is feasible and safe, although it could't relieve the postoperative pian, it do offer a higher cosmetic satisfaction.

Background: The Da Vinci single-site© surgical platform (DVSSP) is a set of single-site instruments and accessories specifically dedicated to robot-assisted single-site surgery., Methods: The PubMed database from inception to June 2015 was searched for English literature on the clinical use of DVSSP in general surgery, urology and gynecology., Results: Twenty-nine articles involving the clinical application of DVSSP were identified; 15 articles on general surgery (561 procedures), four articles on urology (48 procedures) and 10 articles on gynecology (212 procedures). All studies have proven the safety and feasibility of the use of DVSSP. The principal reported advantage is the restoration of intra-abdominal triangulation, while the main reported limitation is the lack of the endowrist., Conclusions: Da Vinci systems have proven to be valuable assets in single-site surgery, owing to the combination of robot use with the dedicated single-incision platform. However, case-control or prospective trials are warranted to draw more definitive conc lusions. Copyright © 2015 John Wiley & Sons, Ltd., (Copyright © 2015 John Wiley & Sons, Ltd.)

Objective: To proposed a novel method for a difficult laparoscopic hysterectomy that spares the cervical ligaments and eliminates the cervical canal and transformation zone of the cervix., Case Report: A 40-year-old women, gravida 3 para 3, who had had a cesarean delivery previously, was referred to the gynecology clinic due to adenomyosis with menorrhagia and severe anemia. Ultrasonography showed that the uterus was enlarged to 13.5 cm × 10.7 cm × 8.8 cm. After obtaining informed consent, a two-phase laparoendoscopic single-site (LESS) cervical ligaments-sparing hysterectomy was performed smoothly. The patient discharged on 4th day and resumed her sexual life less than 2 months after surgery., Conclusion: This novel minimal invasive method of hysterectomy makes difficulty laparoscopic hysterectomy easy and safe. Preservation of cervical ligaments retains stability in the pelvic floor and may reduce intraoperative complications and subsequent pelvic floor organ prolapse., (Copyright © 2016. Published by Elsevier B.V.)

The last two decades witnessed the inception and exponential implementation of key technological advancements in laparoscopic urology. While some of these technologies thrived and became part of daily practice, others are still hindered by major challenges. This review was conducted through a comprehensive literature search in order to highlight some of the most promising technologies in laparoscopic visualization, augmented reality, and insufflation. Additionally, this review will provide an update regarding the current status of single-site and natural orifice surgery in urology.

Introduction: Umbilical laparoendoscopic single-site (LESS) surgery represents an excellent alternative to laparoscopic or robotic multiport surgery. LESS surgery offers faster recovery, less postoperative pain and optimal cosmetic results. LESS is possible in virtually any urologic surgery., Patient and Method: We present a 38-year-old male with BMI 31.2 and with history of stage I nonseminomatous mixed germ cell tumor showing interaortocaval lymph node recurrence without elevation of tumor markers. Patient was undergone to right laparoendoscopic single-site retroperitoneal lymph node dissection (LDRP-LESS) by umbilical approach using a single-site multichannel KeyPort (Richard Wolf GmbH, Knittlingen, Germany)., Results: After the placement of the device and triangulation of the clips, we proceeded to operate on posterior parietal peritoneum. The descending colon was mobilized to access the retroperitoneum. Complete retroperitoneal lymph node dissection on the right side from iliac vessels to renal vessels, including the paracaval and interaortocaval space, was performed. The specimen was inserted into a laparoscopic bag and was removed together with multichannel system. Abdominal drainage was not employed. Surgical time was 85 min and estimated bleeding 50 cc. The patient was very satisfied with the cosmetic results and was discharged the following day without needing analgesia. The pathology report revealed metastatic seminoma in 5 of 11 lymph nodes receiving systemic chemotherapy (VP16-CDDPs) for 4 cycles with good tolerance. A year later, the patient was disease-free and had no complications., Conclusions: Umbilical primary LDRP-LESS, with excellent oncologic and cosmetic results, is feasible in selected cases. This approach could be considered the least invasive surgical option economically advantageous due to the reusable nature of the instruments used., (Copyright © 2014 AEU. Publicado por Elsevier España, S.L.U. All rights reserved.)

Objectives: Occasionally, the development of laparoscopic procedures allows the performance of combined surgeries. Currently, some of these can be carried out by trans-umbilical single-port laparoscopy., Material and Methods: We report a patient with renal tumor of 4.5cm and cholelithiasis who undergone to trans-umbilical single port-right radical nephrectomy with concomitant cholecystectomy. This is the first case reported in Spain that this combined procedure is performed using umbilical single port surgery., Results: No complications (intra or postoperative) have been described in this case, achieving proper control of tumor pathology and an excellent cosmetic outcome., Conclusion: In those cases in which multidisciplinary approach is required, surgery can be performed by trans-umbilical single-port laparoscopy as consequence of its reduced postoperative morbidity and better cosmetic results., (Copyright © 2014 AEU. Publicado por Elsevier España, S.L.U. All rights reserved.)

Aim: To compare the clinical outcome of single-incision laparoscopic cholecystectomy (SILC) and three-incision laparoscopic cholecystectomy (3ILC) for acute cholecystitis., Methods: From July 2009 to September 2012, 136 patients underwent SILC or 3ILC for acute cholecystitis at a tertiary referral hospital. One experienced surgeon performed every procedure using 5 or 10 mm 30-degree laparoscopes, straight instruments, and conventional ports. Five patients with perforated gallbladder and diffuse peritonitis and 23 patients with mild acute cholecystitis were excluded. The remaining 108 patients were divided into complicated and uncomplicated groups according to pathologic findings. Patient demography, clinical data, operative results and complications were recorded and analyzed., Results: Fifty patients with gangrenous cholecystitis, gallbladder empyema, or hydrops were classified as the complicated group, and 58 patients with acute cholecystitis were classified as the uncomplicated group. Twenty-three (46.0%) of the patients in the complicated group (n = 50) and 39 (67.2%) of the patients in the uncomplicated group (n = 58) underwent SILC; all others underwent 3ILC. The postoperative length of hospital stay (PLOS) was significantly shorter in the SILC subgroups than the 3ILC subgroups (3.5 ± 1.1 d vs 4.6 ± 1.3 d, P < 0.01 in the complicated group; 2.9 ± 1.1 d vs 3.7 ± 1.4 d, P < 0.05 in the uncomplicated group). The maximum body temperature recorded at day 1 and at day 2 following the procedure was lower in the SILC subgroups, but the difference reached statistical significance only in the uncomplicated group (37.41 ± 0.56 °C vs 37.80 ± 0.72 °C, P < 0.05 on postoperative day 1; 37.10 ± 0.43 °C vs 37.57 ± 0.54 °C, P < 0.01 on postoperative day 2). The operative time, estimated blood loss, postoperative narcotic use, total length of hospital stay, conversion rates, and complication rates were similar in both SILC and 3ILC subgroups. The complicated group had longer operative time (122.2 ± 35.0 min vs 106.6 ± 43.6 min, P < 0.05), longer PLOS (4.1 ± 1.3 d vs 3.2 ± 1.2 d, P < 0.001), and higher conversion rates (36.0% vs 19.0%, P < 0.05) compared with the uncomplicated group., Conclusion: SILC is safe and efficacious for patients with acute cholecystitis. The main benefit is a faster recovery than that achieved with 3ILC.

Purpose: The optimal approach for removing surgical materials that have penetrated the bladder is still debatable. We reviewed our initial experience with transvesical (percutaneous intraluminal access) laparoendoscopic single site surgery to treat such complications. We determined the safety, efficacy and morbidity of the procedure., Materials and Methods: In this case series study 9 women 24 to 63 years old were operated on from November 2009 to July 2012 due to bladder tape/mesh or surgical suture extrusion using the transvesical (percutaneous intraluminal access) laparoendoscopic single site surgery approach. We used the TriPort™ or TriPort+ single site access system, and a combination of straight and articulating or only standard laparoscopic instruments. A running V-Loc™ suture was placed as needed. In all cases followup included urine tests, abdominal ultrasound and cystoscopy., Results: Mean operative time was 59 minutes (range 35 to 105). Median postoperative hospital stay was 2.4 days. No blood loss or complications were observed except 1 conversion to open surgery because of a perivesical abscess. No extra port was added. No adverse events related to the method were observed during the mean 19-month followup. In 1 patient mesh extrusion recurred after 12 months of followup., Conclusions: We consider this technique to be an efficient, safe procedure and a valuable minimally invasive treatment option for foreign body removal from the bladder. However, further observations are needed to prove the validity of the method., (Copyright © 2013 American Urological Association Education and Research, Inc. Published by Elsevier Inc. All rights reserved.)

Recent advances in urology have included natural orifice translumenal endoscopic surgery (NOTES) and laparoendoscopic single-site surgery (LESS). These techniques seek to minimize morbidity by reducing the number of transabdominal port sites, but this comes at a cost of decreased instrument agility and other technical challenges that have prevented LESS and NOTES from entering mainstream urologic practice. Magnetic anchoring and guidance systems (MAGS) consist of instruments that are inserted laparoscopically through an entry in the peritoneal cavity at one point and then driven into position elsewhere and controlled with magnets. These instruments improve the ergonomics of minimally invasive surgery and may help make LESS and NOTES more accessible to urologists across experience levels.