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The article discusses the use of the mock-up technique in esthetic dentistry, specifically for diastema closure. The technique involves creating simulations to show patients potential outcomes of treatment, allowing for realistic expectations and improved communication between patients and clinicians. The article presents a clinical case of a patient with high esthetic expectations, detailing the process of orthodontic corrections and ceramic veneers to achieve the desired outcome. The importance of informed consent and patient satisfaction in achieving esthetic goals is emphasized throughout the article. [Extracted from the article]

[Display omitted] [ABSTRACT FROM AUTHOR]

Thoracic surgery is deeply intertwined with the principles of physics, which govern the tools and techniques used in various procedures. A thorough understanding of these principles is essential for the safe and effective use of surgical technology, advancing surgical techniques, and developing new medical devices. This manuscript provides a comprehensive overview of crucial physical principles relevant to thoracic surgery, such as radiosterilization, electrosurgery, fluid dynamics, endoscopic techniques, diffusion principles, and laser technologies. This manuscript aims to enhance thoracic surgeons' understanding of how physics underpins their practice by elucidating the connections between these principles and their medical applications. This multidisciplinary approach seeks to improve surgical outcomes by fostering a deeper appreciation of the fundamental science behind thoracic surgery, thereby encouraging innovation and the safe, effective use of advanced surgical technologies. [ABSTRACT FROM AUTHOR]

Background: Laparoscopic cholecystectomy with ultrasonic dissection presents a compelling alternative to conventional electrocautery. The evidence for elective cholecystectomy supports the adoption of ultrasonic dissection, citing advantages such as reduced operating time, diminished bleeding, shorter hospital stays and decreased postoperative pain and nausea. However, the efficacy of this procedure in emergency surgery and patients diagnosed with acute cholecystitis remains uncertain. The aim of this study was to compare outcomes of electrocautery and ultrasonic dissection in patients with acute cholecystitis. Methods: A randomized, parallel, double-blinded, multicentre controlled trial was conducted across eight Swedish hospitals. Eligible participants were individuals aged ≥ 18 years with acute cholecystitis lasting ≤ 7 days. Laparoscopic cholecystectomy was performed in the emergency setting as soon as local circumstances permitted. Random allocation to electrocautery or ultrasonic dissection was performed in a 1:1 ratio. The primary endpoint was the total complication rate, analysed using an intention-to-treat approach. The primary outcome was analysed using logistic generalized estimated equations. Patients, postoperative caregivers, and follow-up personnel were blinded to group assignment. Results: From September 2019 to March 2023, 300 patients were enrolled and randomly assigned to electrocautery dissection (n = 148) and ultrasonic dissection (n = 152). No significant difference in complication rate was observed between the groups (risk difference [RD] 1.6%, 95% confidence interval [CI], − 7.2% to 10.4%, P = 0.720). No significant disparities in operating time, conversion rate, hospital stay or readmission rates between the groups were noted. Haemostatic agents were more frequently used in electrocautery dissection (RD 10.6%, 95% CI, 1.3% to 19.8%, P = 0.025). Conclusions: Ultrasonic dissection and electrocautery dissection demonstrate comparable risks for complications in emergency surgery for patients with acute cholecystitis. Ultrasonic dissection is a viable alternative to electrocautery dissection or can be used as a complementary method in laparoscopic cholecystectomy for acute cholecystitis. Trial registration: The trial was registered prior to conducting the research on http://clinical.trials.gov, NCT03014817. [ABSTRACT FROM AUTHOR]

Introduction Operating room fires can have devastating consequences and as such must be prevented. There exists a paucity of literature requiring further elucidation regarding manufacturer recommendations of a predefined waiting period prior to patient draping after using alcohol-based surgical antiseptics, in order to reduce the risk of operating room fires. Methods This was further investigated by exposing two common alcohol-based surgical antiseptics to electrosurgery and open flames at various power settings and time intervals in an ex vivo porcine model. The simulated surgical site was prepped following manufacturer recommendations and exposed to monopolar electrosurgery at low and high power, using both PURE CUT and COAGULATION modes, and open flame, at 15-s increments after application. Results While using PURE CUT mode at both low and high power, no ignition was observed on hairless surgical sites prepped with ChloraPrep® at any time point. However, use of COAGULATION mode at both low and high powers resulted in ignition consistently out to 1-min post-application. Additionally, if the prepped area subjectively appeared wet, especially with pooling of the antiseptic, both COAGULATION mode and open flame caused ignition. Dry time was found to be about 59 s for both prep solutions. It was also observed that the amount of pressure directly correlated with the amount of prep dispersed and increased dry times. Conclusion In conclusion, our data suggest an average dry time of less than 1-min, with ignition only observed when the antiseptic was visibly wet. Ignition did not occur on hairless skin with electrocautery on CUT mode using ChloraPrep at any time point. Additionally, ignition on hair-bearing skin was not observed past 3 min, with current manufacturer recommendations stating 1 h wait time for hair-bearing skin. Arbitrarily waiting a specific predetermined dry time until patient draping, as recommended by the manufacturers, may be unnecessary and lead to hours' worth of time wasted each year. Ongoing research will further investigate the utility of drying the antiseptic after application and its affect on not only preventing ignition but also antimicrobial efficacy. [ABSTRACT FROM AUTHOR]

Background: Cryotherapy and electrosurgery are two commonly used methods to remove sebaceous hyperplasia, seborrheic keratosis, cherry angioma, and skin tags, which can be bothersome and uncomfortable. We compare the effectiveness and adverse effects of cryotherapy and electrosurgery in treating these skin conditions. Method: The study was conducted as an assessor‐blind trial. The 32 lesions in each lesion group were divided into two treatment groups, cryotherapy and electrosurgery, using sealed envelopes. We collected baseline information, which included age, gender, lesion location, and consent, from the patients. Follow‐up visits were scheduled at 2 weeks, 1 month, and 3 months after the initial treatment session to evaluate the response rate of the lesions. Based on before‐after clinical images, this evaluation encompassed patient and physician satisfaction (no change, little, somewhat, good, and excellent), and any potential complications. Results: The mean age of cryotherapy group was 52.04 ± 11.59 years, while the mean age in the electrosurgery group was 50.48 ± 10.70 years (p > 0.05). Regarding gender, 15 (23.4%) in the cryotherapy and 24 (37.5%) in the electrosurgery were female (p > 0.05). Physician and patient satisfaction increased significantly over time in the cryotherapy and electrosurgery groups (p < 0.001). For sebaceous hyperplasia, cherry angioma and skin tags, the degree of satisfaction of patients and physicians was significantly higher for electrosurgery than cryotherapy during follow‐up (p < 0.05). However, seborrheic keratosis responded better to cryotherapy. Hypopigmentation and depigmentation occurred in 2 (3.1%) and 4 (6.3%) of the cryotherapy cases, respectively. Hypopigmentation and atrophic scars also occurred in 4 (6.3%) and 2 (3.1%) of the cases in the electrosurgical group in different sessions. Conclusion: It appears that electrosurgery is more effective in the treatment of sebaceous hyperplasia, cherry angioma and skin tags, while cryotherapy is more effective in the treatment of seborrheic keratosis. [ABSTRACT FROM AUTHOR]

Objective: To clarify the incidence of excessive distension absorption in hysteroscopic surgery using 5% mannitol solution, evaluate the associated risks, and help to establish a safe fluid deficit threshold for such complication. Design: Retrospective descriptive study. Setting: Academic medical center. Patients: Ten thousand six hundred ninety-three patients underwent inpatient hysteroscopic surgery with 5% mannitol perfusion using a monopolar electrosurgical instrument from Jan. 2015 to Sep. 2020. Intervention(s): None. This study has been approved by the Ethics Committee of Sun Yat-sen Memorial Hospital. Measurements and main results: A fluid deficit of more than 1000 mL was defined as the diagnostic criteria for excessive distension absorption. The overall incidence of excessive distension absorption in this study was 0.46% (49/10693). The incidence was 2.57% (16/623) for transcervical resection of fibroid (TCRF), 2.36% (9/381) for retained products of conception (RPOC) removal, 1.20% (6/501) for hysteroscopic uterine septum resection (HSR), 0.48% (4/828) for transcervical resection of the endometrium (TCRE), and 0.53% (14/2621) for transcervical resections of adhesion (TCRA). Excessive distension absorption could occur within seven minutes in HSR. Among the patients diagnosed with excessive distension absorption, 30.77% (12/39) exhibited signs or symptoms related to circulation overload with a fluid deficit under 2500 mL, and 10.26% (4/39) developed pulmonary edema. Conclusion: Excessive distension absorption could happen in all kinds hysteroscopic surgical treatment including RPOC removal and TCRA which were rarely reported. The overall incidence of excessive distension absorption could be low. But it would be five times higher in certain procedures such as TCRF, RPOC removal and TCRA. Resection using a needle electrode in HSR and TCRA may contribute to the short time development of excessive distension absorption. 30.77% of the patients could not tolerate the fluid deficit of less than 2500 mL which was set as a threshold for isotonic distending media and presented with circulation overload related signs or symptoms. [ABSTRACT FROM AUTHOR]

The interface between dental restorations and the neighbouring soft tissue is of key significance for restorative success and longevity. Trauma-related enamel–dentine fractures are frequently present with the restorative challenge of subgingival margins and little remaining tooth structure. This report looks at two paediatric dental trauma patients with extensive crown fractures resulting in subgingival margins, which posed a poor long-term tooth survival. Electrosurgery was used before definitive composite restorations to allow for supragingival margins and access. Each patient attended the Child Dental Health Department at the University of Manchester Dental Hospital for assessment and treatment provision. CPD/Clinical Relevance: This article identifies electrosurgery as an increasingly useful adjunct to restorative management of traumatized permanent incisor teeth in paediatric patients. [ABSTRACT FROM AUTHOR]

Abstract Background Laparoscopic cholecystectomy with ultrasonic dissection presents a compelling alternative to conventional electrocautery. The evidence for elective cholecystectomy supports the adoption of ultrasonic dissection, citing advantages such as reduced operating time, diminished bleeding, shorter hospital stays and decreased postoperative pain and nausea. However, the efficacy of this procedure in emergency surgery and patients diagnosed with acute cholecystitis remains uncertain. The aim of this study was to compare outcomes of electrocautery and ultrasonic dissection in patients with acute cholecystitis. Methods A randomized, parallel, double-blinded, multicentre controlled trial was conducted across eight Swedish hospitals. Eligible participants were individuals aged ≥ 18 years with acute cholecystitis lasting ≤ 7 days. Laparoscopic cholecystectomy was performed in the emergency setting as soon as local circumstances permitted. Random allocation to electrocautery or ultrasonic dissection was performed in a 1:1 ratio. The primary endpoint was the total complication rate, analysed using an intention-to-treat approach. The primary outcome was analysed using logistic generalized estimated equations. Patients, postoperative caregivers, and follow-up personnel were blinded to group assignment. Results From September 2019 to March 2023, 300 patients were enrolled and randomly assigned to electrocautery dissection (n = 148) and ultrasonic dissection (n = 152). No significant difference in complication rate was observed between the groups (risk difference [RD] 1.6%, 95% confidence interval [CI], − 7.2% to 10.4%, P = 0.720). No significant disparities in operating time, conversion rate, hospital stay or readmission rates between the groups were noted. Haemostatic agents were more frequently used in electrocautery dissection (RD 10.6%, 95% CI, 1.3% to 19.8%, P = 0.025). Conclusions Ultrasonic dissection and electrocautery dissection demonstrate comparable risks for complications in emergency surgery for patients with acute cholecystitis. Ultrasonic dissection is a viable alternative to electrocautery dissection or can be used as a complementary method in laparoscopic cholecystectomy for acute cholecystitis. Trial registration The trial was registered prior to conducting the research on http://clinical.trials.gov , NCT03014817.

Purpose. To evaluate the effectiveness and safety of direct current cornea fulguration in the treatment of drug-resistant keratitis. Material and methods. 20 patients (20 eyes) diagnosed with drug-resistant infectious keratitis (bacterial, acanthamoeba, fungal), underwent fulguration of the infiltration zone with plasma electrocautery. In addition to a standard ophthalmological examination, all patients were tested for corneal thickness and lesion depth before surgery and 1 day, 1 month, and 3 months after surgery by anterior segment optical coherence tomography (OCT). After photofixation of the cornea, OCT data were used to dynamically assess the lesion area and deepithelialization. Results. In 95 % of cases (19 eyes), the infectious inflammatory process could be stopped in 3 to 7 weeks, with the opacification onset in the stromal layers of the cornea 2–3 weeks after the procedure. In these cases, after 2 weeks, the infiltrated or corneal ulcer area was completely epithelialized. Over a long postprocedural period (3 months), the corneal thickness in the inflammation area varied from 285 µm to 791 µm. During the entire observation period, the integrity of the cornea was maintained and transparency improved. 3 months after surgery, the average visual acuity corrected by spectacle lenses increased from 0.42 ± 0.35 to 0.54 ± 0.33. Conclusion. Direct current fulguration can be an effective and relatively safe urgent treatment for drug-resistant infectious keratitis.

Interventional pulmonology can be helpful in cases of malignant airway stenosis. We present a 73‐year‐old man diagnosed with lung cancer who presented with symptomatic airway stenosis caused by a large endobronchial tumor. Oncological treatment was started with chemotherapy, radiotherapy, and a multimodality bronchoscopic approach using balloon bronchoplasty, electrosurgery, and argon plasma coagulation. Response evaluation showed relief of symptoms, disappearance of the endobronchial tumor, and complete resolution of the airway stenosis. [ABSTRACT FROM AUTHOR]

Considering the increasing demand for personalized surgical care, as well as current healthcare resources limitations, the use of anatomical accurate 3D physical phantoms is becoming increasingly important for the training of surgeons and the test of surgical instruments. A lack of physical models is nowadays denoted regarding the training in electrosurgery, despite its wide diffusion in medical practice. This work reports an extensive characterization of electrosurgical physical phantoms fabricated with tissue‐mimicking ionogels and hydrogels. A careful design of the conductive gels allow the fine tuning of their mechanical and electrical properties, in order to match those of biological tissues. The manufacturing of a novel multi‐material skin stratification bench‐top pad is reported together with its use for training in both cold and electrical surgery. Furthermore, a feasibility study is reported, showing the use of conductive ionogels for simulating the coagulation of cortical vessels during brain surgery. [ABSTRACT FROM AUTHOR]

Introduction: Surgical procedures in contemporary practice frequently employ energy-based devices, yet comprehensive education surrounding their safety and effectiveness remains deficient. We propose an innovative course for residents that aims to provide basic electrosurgery knowledge and promote the safe use of these devices. Methods: We developed a simulated training course for first-year general surgery and orthopedic residents. First, a survey was conducted regarding their knowledge perception about energy devices. The course consisted of two online theoretical sessions, followed by three in-person practical sessions. First-year residents performed three video-recorded attempts using a cadaveric model and were assessed through a digital platform using the Objective Structured Assessment of Technical Skill (OSATS), a Specific Rating Scale (SRS), and a surgical energy-based devices scale (SEBS). Third-year residents were recruited as a control group. Results: The study included 20 first-year residents and 5 third-year residents. First-year residents perceived a knowledge gap regarding energy devices. Regarding practical performance, both OSATS and checklist scores were statistically different between novices at their first attempt and the control group. When we analyzed the novice's performance, we found a significant increase in OSATS (13 vs 21), SRS (13 vs 17.5), and SEBS (5 vs 7) pre- and post-training scores. The amount of feedback referred to skin burns with the electro-scalpel reduced from 18 feedbacks in the first attempt to 2 in the third attempt (p-value = 0.0002). When comparing the final session of novices with the control group, no differences were found in the SRS (p = 0.22) or SEBS (p = 0.97), but differences remained in OSATS (p = 0.017). Conclusion: This study supports the implementation of structured education in electrosurgery among surgical trainees. By teaching first-year residents about electrosurgery, they can acquire a skill set equivalent to that of third-year residents. The integration of such courses can mitigate complications associated with energy device misuse, ultimately enhancing patient safety. [ABSTRACT FROM AUTHOR]

Background: There is much heterogeneity in the instrumentation used for parenchymal transection in minimally invasive liver surgery. Instruments specifically designed for robotic parenchymal transection of the liver are lacking. We aim to gain insight into the safety and effectiveness of the SynchroSeal (Intuitive Surgical, Inc., Sunnyvale, CA), a novel bipolar electrosurgical device, in the context of liver surgery. Methods: The present study is a post-hoc analysis of prospectively collected data from patients undergoing robotic liver resection (RLR) using the SynchroSeal in two high-volume centres. The results of the SynchroSeal were compared with that of the previous generation bipolar-sealer; Vessel Sealer Extend (Intuitive Surgical, Inc., Sunnyvale, CA) using propensity score matching, after excluding the first 25 Vessel Sealer procedures per center. Results: During the study period (February 2020–March 2023), 155 RLRs meeting the eligibility criteria were performed with the SynchroSeal (after implementation in June 2021) and 145 RLRs with the Vessel Sealer. Excellent outcomes were achieved when performing parenchymal transection with the SynchroSeal; low conversion rate (n = 1, 0.6%), small amounts of intraoperative blood loss (median 40 mL [IQR 10–100]), short hospital stays (median 3 days [IQR 2–4]), and adequate overall morbidity (19.4%) as well as severe morbidity (11.0%). In a matched comparison (n = 94 vs n = 94), the SynchroSeal was associated with less intraoperative blood loss (48 mL [IQR 10–143] vs 95 mL [IQR 30–200], p = 0.032) compared to the Vessel Sealer. Other perioperative outcomes were similar between the devices. Conclusion: The SynchroSeal is a safe and effective device for robotic liver parenchymal transection. [ABSTRACT FROM AUTHOR]

Despite increasing evidence on the hazardous nature of electrosurgical smoke (ESS), inconsistent electrosurgical smoke evacuation (ESSE) is a concern among operating theatre (OT) personnel at a large tertiary hospital in New Zealand (NZ). This exploratory-descriptive qualitative (EDQ) study aimed to develop a better understanding of OT personnel's attitude towards ESS and how it influenced their ESS control practice. Using semistructured interviews with OT personnel and a reflexive thematic data analysis approach, findings revealed that ESSE is poorly implemented in laparoscopies. Education of OT personnel across disciplines about ESS and its evacuation could influence positive attitudes toward ESS control practice to promote a healthy, smoke-free OT environment for patients and personnel. [ABSTRACT FROM AUTHOR]

Hysteroscopic surgery requires a balance of continuous controlled irrigation and aspiration to distend the endometrial cavity to a degree that provides the clear and stable visual environment necessary for diagnostic and therapeutic procedures. Whereas the preferred distending solution should be isotonic and isonatremic, radiofrequency (RF) electrosurgery with monopolar instrumentation can only be performed with non‐ionic (hyponatremic) solutions. Absorption of as little as 500 mL and certainly more than 1000 mL of non‐ionic solutions can result in fluid overload and/or dilutional hyponatremia with potentially serious adverse effects under certain conditions and patient characteristics. Both hysteroscopic RF electrosurgery with bipolar instrumentation and electro‐mechanical morcellation and aspiration systems use isotonic and isonatremic solutions. Depending on the clinical context, absorption of more than 1500 mL of isonatremic solutions can also result in serious adverse effects. Automated fluid management systems are preferred and recommended, and surgeons should aim to maintain the maximum allowable intravasation of distending media below 1000 and 1500 mL for non‐ionic and ionic fluids, respectively. [ABSTRACT FROM AUTHOR]

This article, titled "Electrosurgical Principles: Beyond Blue and Yellow Pedal," provides an overview of electrosurgical principles and their application in clinical practice. The use of electrosurgery has become widespread in endoscopic procedures, but education on these principles is limited. The article explains the fundamentals of electrosurgery, including the conversion of electrical energy into thermal energy and the effects of temperature on cell physiology. It also discusses different electrosurgical waveforms and their use in cutting and coagulating tissue. The article emphasizes the importance of understanding these principles to achieve the desired tissue effect and minimize risks. [Extracted from the article]

BACKGROUND Desmoplastic trichoepithelioma (DTE) is an uncommon benign adnexal tumor that histologically may mimic malignant tumors including basal cell carcinoma and microcystic adnexal carcinoma. OBJECTIVE To present a systematic review of the epidemiology, clinical characteristics, treatment, and outcome data on DTEs, with emphasis on comparing Mohs micrographic surgery (MMS) with other treatments. METHODS Using the OVID platform, MEDLINE and Embase were searched from inception for studies providing original data on DTEs. RESULTS A total of 338 cases of DTE from 61 articles were included. No recurrence/persistence (0%) was reported following MMS (n 5 24, mean follow-up of 41.9 months), 13.1% with standard excision (n 5 38, mean follow-up 16.9 months), and 2.1% for electrosurgery/cautery (n 5 49, follow-up 3-72 months). 100% recurrence/persistence for imiquimod (n 5 2) and liquid nitrogen (n 5 4) were identified. In patients who underwent biopsy only, there was a 12.5% recurrence/persistence (n 5 32, mean follow-up 16.5 months). Overall, duration of follow-up varied from 2 months to 6 years for the various management strategies. CONCLUSION Data are limited regarding DTE outcomes. In this review, surgical modalities, specifically MMS, had the lowest rates of recurrence/persistence compared with other options. Given that most lesions are found on cosmetically sensitive locations, MMS seems to be the optimal management strategy for actively managing DTEs. [ABSTRACT FROM AUTHOR]

Objectives: Loop electrosurgical excision procedure (LEEP), which is effectively used in the diagnosis and treatment of cervical intraepithelial neoplasia (CIN), can be performed under general and local anesthesia. The aim of this study is to retrospectively examine whether the chosen anesthesia method affects the surgical margin and the factors affecting the surgical margin. Materials and Methods: Data of 122 patients who met the inclusion criteria and underwent LEEP between 2016 and 2021 were retrospectively analyzed. Demographic data (age, body mass index, alcohol and smoking); gynecological anamnesis: Gravida, parity, number of living children, number of abortions, menopausal status, type of contraceptive method and presence of additional metabolic diseases (hypertension, diabetes, coronary artery disease) were recorded from the patients’ files and epicrisis. LEEP indications and pre-LEEP HPV information were recorded. LEEP procedure data: Anesthesia method used; general or local anesthesia, positive surgical margin rate (for example, the presence of CIN II/III at the ectocervical and/or endocervical resection margins was considered positive), size of the removed piece (anteroposterior length, transverse length and height, volume), pathology results were recorded and factors affecting margin positivity were examined. Results: It was determined that the type of anesthesia administered (general or local), patient age older than 40 years, patient being in menopause, and the size and volume of the sample taken during LEEP had no effect on margin positivity, whereas high-grade cervical cytology before LEEP, the presence of endocervical gland involvement, and the number of multiple passes in the excision were shown to increase the risk for margin positivity. Conclusion: We found that high-grade cervical cytology before LEEP, the presence of endocervical gland involvement, and multiple passes in excision were risk factors predicting a positive surgical margin; however, the type of anesthesia did not affect the surgical margin. [ABSTRACT FROM AUTHOR]

The main stages and principles of development of a high-frequency electrosurgical device are described, the mechanisms of action of high-frequency currents on biological tissues are considered, and the results of clinical testing of this medical device are presented. [ABSTRACT FROM AUTHOR]

Surgical cutting with electrosurgical tools facilitates tissue dissection and vessel sealing, preventing blood loss. The extent of tissue necrosis due to temperature elevations is dependent on the cutting technique, device design, coating properties and power settings, but the influence of these parameters is not fully understood. Here we conduct a comprehensive comparative analysis of thermal damage comparing (1) manual user-controlled and robotic electrosurgical cutting approaches for (2) varying electrodes and coatings, and power settings. We demonstrate that ceramic coating significantly enhanced cutting performance and cut quality and reduced lateral thermal damage, by 86.15% at 35 W and 65% at 50 W respectively. We provide quantitative assessment of the influence of surgical variability on thermal damage, comparing robotic and manual electrosurgical cutting. Robotic cutting with one ceramic electrosurgical coated device reduced thermal damage (midline − 47.42%, lateral − 33.06%), whereas for the other coated electrode the thermal spread increased (midline − 66.57%, lateral −245.72). Thus, thermal damage performance was strongly influenced by surgical variability and the specific characteristics of each device. Together, these results provide an enhanced understanding of potential mechanisms determining electrosurgical outcomes. Understanding of these interdependencies and mechanisms of action linked to a specific electrosurgical system is essential for successful tissue resection.

Objective: We present a physics-based, temperature and state-dependent electrical conductivity model for soft biological tissue under thermal therapies with a quantified damage parameter that represents the state of soft biological tissue (degree of denaturation). Most existing models consider electrical conductivity to be only temperature-dependent and evaluate tissue damage during post-processing after temperature calculation. Our model allows tissue damage to be coupled into the thermal model for a more accurate description of both RF ablation and electrosurgery. Methods: We model the denaturation process with an Arrhenius-type differential equation for chemical kinetics and a modified Stogryn equation for electrical conductivity under state transition. We present experimental data from two types of heating procedures at 128 kHz to validate and showcase the capability of our model. Results: Our model is able to capture the change in electrical conductivity during heating, cooling, and reheating procedures, which distinguishes different states and shows the irreversibility of denaturation. The model also accurately captures tissue change during slow cooking at a constant temperature, highlighting a state dependence. Conclusion: By incorporating state dependence into the model for electrical properties, we are able to capture the denaturation process more accurately and distinguish different degrees of damage. Our model allows the modeling of procedures involving repeated heating or cooling, which is impossible for models without a state dependence. While being able to adapt to patient-specific needs, the model can be used to improve planning and control in future robot-assisted surgeries to reduce unnecessary damage.

ABSTRACT Background Cryotherapy and electrosurgery are two commonly used methods to remove sebaceous hyperplasia, seborrheic keratosis, cherry angioma, and skin tags, which can be bothersome and uncomfortable. We compare the effectiveness and adverse effects of cryotherapy and electrosurgery in treating these skin conditions. Method The study was conducted as an assessor‐blind trial. The 32 lesions in each lesion group were divided into two treatment groups, cryotherapy and electrosurgery, using sealed envelopes. We collected baseline information, which included age, gender, lesion location, and consent, from the patients. Follow‐up visits were scheduled at 2 weeks, 1 month, and 3 months after the initial treatment session to evaluate the response rate of the lesions. Based on before‐after clinical images, this evaluation encompassed patient and physician satisfaction (no change, little, somewhat, good, and excellent), and any potential complications. Results The mean age of cryotherapy group was 52.04 ± 11.59 years, while the mean age in the electrosurgery group was 50.48 ± 10.70 years (p > 0.05). Regarding gender, 15 (23.4%) in the cryotherapy and 24 (37.5%) in the electrosurgery were female (p > 0.05). Physician and patient satisfaction increased significantly over time in the cryotherapy and electrosurgery groups (p

ABSTRACT Objective: To evaluate the role of being human immunodeficiency virus (HIV) positive for predicting the risk of recurrence in women with a cervical high grade squamous intraepithelial lesion (HSIL) diagnosis. Methods: Retrospective observational case-control study, comprising HIV positive (case) and HIV negative (control) women in a 1:4 ratio. Women assisted by the Erasto Gaertner Hospital, between 2009-2018, with cervical HSIL diagnosis, submitted to treatment by Loop electrosurgical excision procedure (LEEP), and with a minimum follow-up of 18 months, were included. The immunological status, number and time to recurrence were analyzed, with p

ABSTRACT Purpose: Laparoscopic cholecystectomy (LC) is the gold standard for the treatment of gallbladder (GB) disease in small animals. The aims of this study were to investigate and compare the effect of different types of dissectors during LC in rabbits; electrothermal bipolar vessel sealing device (EBVS-LigaSure) and standard electrosurgical dissection (bipolar Maryland) for dissection of the GB in LC, correlating liver function tests (LFTs) in pre and postoperative periods (days 0, 3, 7, 15); macroscopic checking 15 days after surgery through necropsy; histopathological, bacteriological through bacterial growth by culture and intraoperative complications. Methods: Twenty rabbits were used, group (n = 10) using EBVS for GB dissection and cystic duct seal (GLL), and group (n = 10) using bipolar dissecting forceps and EVBS for cystic duct seal (GLE). Results: A higher concentration of alkaline phosphatase was observed on GLL 15 days after surgery when compared to GLE. In addition, GLE resulted in a higher concentration of alanine aminotransferase at three days when compared to GLL. Conclusion: In LC no significant statistical differences were found between EBVS and bipolar Maryland; both devices are equally safe and effective in LC. Further studies are required to evaluate the effectiveness of these devices in animals with gallbladder pathologies. Therefore, clinical studies are necessary.

Electrosurgical generator units (ESUs) are instrumental in modern therapeutic gastrointestinal (GI) endoscopy, converting household alternating current into high-frequency current to generate thermal energy within tissues. This review elucidates the essentials of electrosurgery, exploring the thermal effects on tissue, current resistance, voltage, current density, duty cycle, crest factor, and the distinctions between monopolar and bipolar circuitry. The concept of duty cycle, the proportion of time electrical current is delivered, and crest factor, the ratio of peak to root mean square voltage, are essential while comparing differently named modes across various commercially available ESUs. This article discusses the practical applications of electrosurgery in therapeutic GI endoscopy procedures, including endoscopic sphincterotomy, polypectomy, endoscopic mucosal resection, endoscopic submucosal dissection, and peroral endoscopic myotomy. It outlines recommended modes and settings for ESUs across various procedures, emphasizing the balance between cutting and coagulation to achieve optimal outcomes while minimizing adverse effects. The review further addresses special considerations for the use of grounding pads and the management of patients with implanted cardiac devices during electrosurgical procedures. This article concludes with a call for a deeper understanding of electrosurgical principles and their application in GI endoscopy to ensure patient safety and procedural success, backed by references to relevant literature and detailed tables summarizing electrosurgical modes and settings for various therapeutic interventions.

Electrosurgical and ultrasonic devices are used in surgical procedures for hemostatic sealing and bisection of vascular tissues. Previous benchtop studies alternatively demonstrated successful infrared laser sealing and cutting of blood vessels, in a sequential, two-step approach. This study describes a smaller, laparoscopic device compatible design, and simultaneous approach to sealing and bisection of vessels, with potential optical feedback. A 1470-nm infrared diode laser sealed and bisected 40 porcine renal arteries, ex vivo. A reciprocating, side-firing, optical fiber, housed in a transparent square quartz optical chamber (2.7 × 2.7 × 25 mm outer dimensions), delivered laser energy over an 11 mm scan length, with a range of incident powers (41–59 W) and treatment times (5–21 s). Vessel diameters ranged from 2.5 to 4.8 mm. Vessel burst pressure measurements were performed on each cut end (n = 80) with success indicated by pressures exceeding 360 mmHg. All vessel ends were successfully sealed and bisected (80/80). The highest incident power, 59 W, yielded short treatment times of 5–6 s. Peak temperatures on the external chamber surface reached 103 oC. Time to cool down to body temperature measured 37 s. Infrared lasers simultaneously seal and bisect blood vessels, with treatment times comparable to, and temperatures and cooling times lower than reported for conventional devices. Future work will focus on integrating the fiber and chamber into a standard 5-mm-outer-diameter laparoscopic device. Customization of fiber scan length to match vessel size may also reduce laser energy deposition, enabling lower peak temperatures, treatment times, and cooling times. [ABSTRACT FROM AUTHOR]

Background: The use of high-frequency electric welding technology for intestinal end-to-end anastomosis holds significant promise. Past studies have focused on in vitro, and the safety and efficacy of this technology is uncertain, severely limiting the clinical application of this technology. This study investigates the impact of compression pressure, energy dosage, and duration on anastomotic quality using a homemade anastomosis device in both in vitro and in vivo settings. Methods: Two hundred eighty intestines and 5 experimental pigs were used for in vitro and in vivo experiments, respectively. The in vitro experiments were conducted to study the effects of initial pressure (50–400 kpa), voltage (40–60 V), and time (10–20 s) on burst pressure, breaking strength, thermal damage, and histopathological microstructure of the anastomosis. Optimal parameters were then inlaid into a homemade anastomosis and used for in vivo experiments to study the postoperative porcine survival rate and the pathological structure of the tissues at the anastomosis and the characteristics of the collagen fibers. Results: The anastomotic strength was highest when the compression pressure was 250 kPa, the voltage was 60 V, and the time was 15 s. The degree of thermal damage to the surrounding tissues was the lowest. The experimental pigs had no adverse reactions after the operation, and the survival rate was 100%. 30 days after the operation, the surgical site healed well, and the tissues at the anastomosis changed from immediate adhesions to permanent connections. Conclusion: High-frequency electric welding technology has a certain degree of safety and effectiveness. It has the potential to replace the stapler anastomosis in future and become the next generation of new anastomosis device. [ABSTRACT FROM AUTHOR]

Simple Summary: The present study aimed to evaluate the age-related distribution of HPV 16/18 genotypes and non-16/18 HPV genotypes in unvaccinated women. CIN3 in women younger than 30 years was significantly associated with HPV16/18 genotypes. The surprising fact of the present study is represented by the fact that in women under the age of 30, almost 90% of CIN3 cases were associated with HPV16/18, while CIN3 with non-16/18 HPV genotypes develops slowly and in older age. The data from the present study suggest that the risk of CIN3 is related to the woman's age and hr HPV genotype. These data are essential to optimize current and future screening programs. Background. The objective of the present study is to investigate the age-specific distribution of HPV genotypes in CIN3 lesions in screened unvaccinated women. These data are essential to optimize current and future screening programs. Methods. A multicenter retrospective study was conducted. A total of 408 unvaccinated women with positive histology and a high-risk HPV genotype were enrolled. Each woman at baseline had HPV DNA testing and HPV genotyping, and all women underwent targeted biopsy and/or treatment with a loop electrosurgical excision procedure (LEEP) before entering the study. We divided the genotypes into HPV16/18 and HPV non-16/18 (HPV31/33/45/35/39/51/52/58/59/66/68). Women were divided into increasing age categories: <30, 30–44, and ≥45. Results. The percentage of CIN3 associated with HPV16/18 is maximum in women under 30 years of age (85.1%), drops to 75.6% in women aged between 30 and 44 years, and up to 47.2% in women over 45 years. CIN3 in women younger than 30 years was significantly associated with HPV16/18 genotypes (p = 0). Discussion. The data from the present study suggest that the risk of CIN3 is related to the woman's age and hr HPV genotype. The data highlight two different types of CIN3: a more frequent type, related to HPV16/18, which develops rapidly and in young women, and another, relating to non-16/18 HPV, which develops later at an advanced age and slowly, through low-grade lesions. [ABSTRACT FROM AUTHOR]

Electrosurgical generator units (ESUs) are instrumental in modern therapeutic gastrointestinal (GI) endoscopy, converting household alternating current into high-frequency current to generate thermal energy within tissues. This review elucidates the essentials of electrosurgery, exploring the thermal effects on tissue, current resistance, voltage, current density, duty cycle, crest factor, and the distinctions between monopolar and bipolar circuitry. The concept of duty cycle, the proportion of time electrical current is delivered, and crest factor, the ratio of peak to root mean square voltage, are essential while comparing differently named modes across various commercially available ESUs. This article discusses the practical applications of electrosurgery in therapeutic GI endoscopy procedures, including endoscopic sphincterotomy, polypectomy, endoscopic mucosal resection, endoscopic submucosal dissection, and peroral endoscopic myotomy. It outlines recommended modes and settings for ESUs across various procedures, emphasizing the balance between cutting and coagulation to achieve optimal outcomes while minimizing adverse effects. The review further addresses special considerations for the use of grounding pads and the management of patients with implanted cardiac devices during electrosurgical procedures. This article concludes with a call for a deeper understanding of electrosurgical principles and their application in GI endoscopy to ensure patient safety and procedural success, backed by references to relevant literature and detailed tables summarizing electrosurgical modes and settings for various therapeutic interventions. [ABSTRACT FROM AUTHOR]

The article focuses on introducing a new transcatheter myotomy technique, SESAME, aimed at addressing left ventricular outflow tract obstruction in patients with hypertrophic cardiomyopathy (HCM) and facilitating transcatheter valve replacement (TVR). It is reported that this innovative approach utilizes intramyocardial guidewires and electrosurgery to widen the LVOT (Left Ventricular Outflow Tract), improving symptoms in HCM and TVR patients.

Background: The aim of this study is to determine the effectiveness of the LEEP (Loop Electrosurgical Excision Procedure) procedure in the preoperative evaluation of cervical involvement in endometrial cancer and to evaluate its contribution to the planning of the surgical procedure. Materials and Methods: 75 patients who were examined prospectively and whose histopathological results were compatible with endometrial cancer were divided into two groups to undergo endocervical curettage and LEEP. All patients underwent simple hysterectomy/radical hysterectomy and a surgical staging procedure including pelvic, para-aortic lymph node sampling, omentectomy, and cytology collection. Staging was done according to the FIGO 2009 surgical staging system. The aim was to determine the accuracy rates, sensitivity and specificity in determining cervical involvement by comparing the histopathological findings obtained from the preoperative ECC (Endecervical Curettage) and LEEP procedures of the patients with the operation pathologies. Results: When the pathology results of endocervical curettage samples were compared with the operation pathologies, it was determined that it was statistically significant, but the accuracy rate was 58.7%. When the samples taken from the patients who underwent the LoopElectrosurgicalExcision procedure were compared with the surgical pathologies, it was found to be statistically significant and the accuracy rate was found to be 93.5% (p = 0.037). Conclusions: Determining cervical involvement with the LEEP procedure is superior to the frequently applied endocervical curettage in terms of specificity, positive predictivity and accuracy. [ABSTRACT FROM AUTHOR]

The aim of the study was to assess sexual health in women who underwent Loop Electrosurgical Excisional Procedure (LEEP) for the treatment of cervical intraepithelial neoplasia 3 (CIN 3). One hundred thirty-one women were enrolled, and the Female Sexual Function Index (FSFI) questionnaire was administered before LEEP and 6 months after the procedure. In almost all of the participants, data revealed a statistically significant worsening in sexual quality of life after LEEP. Therefore, clinicians should be aware of these possible negative effects on sexual behavior, and provide women with appropriate, wide-ranging, and detailed counseling. The data obtained in the present study should help to plan appropriate counseling from communicating HPV diagnosis and medical treatment to CIN3 surgical procedure. [ABSTRACT FROM AUTHOR]

(1) Background: DIEP-based breast reconstruction necessitates wide undermining at the abdominal donor site, creating large wound areas. Flap harvesting is usually conducted using electrosurgical dissection devices. This study sought to compare the clinical outcomes in patients after using the PEAK PlasmaBlade (PPB) versus monopolar electrocautery (MPE). (2) Methods: This retrospective cohort study included 128 patients with DIEP-based breast reconstruction. Patient characteristics and information on the postoperative course were collected and a comparative evaluation was conducted. (3) Results: The MPE group exhibited significantly (p* = 0.0324) higher abdominal drainage volume (351.11 ± 185.96 mL) compared to the PPB group (279.38 ± 183.38 mL). A subgroup analysis demonstrated that PPB significantly reduced postoperative wound fluid in patients with BMI > 30 kg/m2 (p* = 0.0284), without prior neoadjuvant chemotherapy (p** = 0.0041), and among non-smokers (p = 0.0046). Furthermore, postoperative pain was significantly (p**** < 0.0001) lower in the PPB cohort. (4) Conclusions: This study confirms the non-inferiority of the PEAK PlasmaBlade to conventional electrocautery for abdominal flap harvesting. The PPB demonstrated advantages, notably reduced drainage volume and lower postoperative pain levels. Recognizing patient subsets that benefit more from the PPB highlights the importance of personalized device selection based on patient characteristics. [ABSTRACT FROM AUTHOR]

Objective The aim of the study is to evaluate the use of a bipolar electrocautery device for complete salpingectomy at cesarean to improve procedure completion rates, operative time, and surgeon reported satisfaction as compared with standard bilateral tubal ligation (BTL) and suture-cut-tie salpingectomy. Study Design This is a prospective cohort study of women undergoing planned, non-emergent cesarean with desired sterilization with complete salpingectomy utilizing a bipolar electrocautery device. Study patients were compared with historic controls from a randomized controlled trial (RCT) of complete salpingectomy via suture-cut-tie method versus BTL conducted at our institution (SCORE trial, NCT02374827). Outcomes were compared with groups from the original RCT. Results Thirty-nine women were consecutively enrolled (12/2018–11/2019) into the device arm of the study and compared with the original SCORE cohort (n = 40 BTL, n = 40 salpingectomy without a device). Salpingectomy performance with the bipolar electrocautery device was successfully completed in 100% (39/39) of enrolled women, with one device failure requiring the use of a second device, as compared with 95% (38/40) in the BTL (p = 0.49) and 67.5% (27/40) in salpingectomies without a device (p < 0.001). Mean operative time of sterilization procedure alone demonstrated device use as having the shortest operative time of all (device salpingectomy 5.0 ± 3.6 vs. no device 18.5 ± 8.3 minutes, p < 0.001; and vs. BTL 6.9 ± 5.0, p = 0.032). Mean sterilization procedure endoscopic band ligation (EBL) was demonstrated to be significantly different between each group, least amongst BTL followed by device (6.3 ± 4.8 vs. 8.4 ± 24.8, p < 0.001), and most by suture-cut-tie method (17.7 ± 14.3, p < 0.001 compared with device). Surgeon reported attitudes of complete salpingectomy performance in general practice outside an academic setting was greater with a device than without (79.5 vs. 35.3%; p < 0.001). Conclusion Use of a bipolar electrocautery device improved operative times and surgeon satisfaction for salpingectomy at cesarean over standard suture ligation. Device use improved surgeon reported outcomes and may improve incorporation of complete salpingectomy at cesarean. Key Points Electrocautery bipolar device use was safe at the time of salpingectomy during cesarean. Greater surgeon satisfaction occurs using a device than without. Decreased surgical time with device use is seen making the procedure equal to BTL. [ABSTRACT FROM AUTHOR]

Purpose: To compare conventional bipolar electrosurgery with advanced bipolar vessel sealing (ABVS) devices for total laparoscopic hysterectomy (TLH). Methods: A systematic review was conducted by searching Scopus, PubMed/MEDLINE, ScienceDirect, and Cochrane Library from January 1989 to November 2021. We identified all studies comparing ABVS devices with conventional bipolar electrosurgery in TLH and reporting at least one of the following outcomes: total blood loss, total operative time, hospital stay, perioperative complications, or costs. Meta-analysis was conducted with a random effect model reporting pooled mean differences and odds ratios (ORs) with related 95% confidence intervals (CIs). Results: Two randomized controlled trials and two retrospective studies encompassing 314 patients were included out of 615 manuscripts. The pooled estimated total blood loss in the ABVS devices group was lower than conventional bipolar electrosurgery of 39 mL (95% CI − 65.8 to − 12.6 mL; p =.004). The use of ABVS devices significantly reduced the total operative time by 8 min (95% CI − 16.7 to − 0.8 min; p =.033). Hospital stay length did not differ between the two groups, and a comparable overall surgical complication rate was observed [OR of 0.9 (95% CI 0.256 – 3.200; p =.878]. Conclusions: High-quality evidence comparing ABVS devices with conventional bipolar electrosurgery for TLH is lacking. ABVS devices were associated with reduced total blood loss and operative time; however, observed differences seem clinically irrelevant. Further research is required to clarify the advantages of ABVS devices over conventional bipolar electrosurgery and to identify cases that may benefit more from their use. [ABSTRACT FROM AUTHOR]

Aim: To seek the high‐risk factors of human papillomavirus (HPV) persistence and residual lesion or recurrence after loop electrosurgical excision procedure (LEEP) focus on the predictive value of intraoperative human papilloma virus (IOP‐HPV) testing. Methods: Intraoperative endocervical sample was obtained with a cytobrush from the remained cervix of 292 patients immediately after LEEP. HPV Genotyping was performed using a polymerase chain reaction technique. All patients followed by HPV genotyping and cytology every 3–6 months. The IOP‐HPV testing results and possible risk factors such as age, cytology grade, menopause status, margin involvement, preoperative HPV status, and cervical lesion grade were assessed in predicting persistence of HPV and residual lesion or recurrence after surgery. Results: There were 61 (20.9%) patients presented persistent HPV infection. Multivariate analyses showed that IOP‐HPV positive, post‐menopause and preoperative HPV multiplex infection was strongly associated with HPV persistence after LEEP, IOP‐HPV positive and post‐menopause was also associated with residua or recurrent disease after LEEP. Conclusions: IOP‐HPV positive, post‐menopause, and preoperative HPV multiplex infection are independent predictors of HPV persistence in patients with cervical squamous intraepithelial lesion treated by LEEP. IOP‐HPV test is a new approach that may potentially allow for early identification of patients at high risk of HPV persistence and residua or recurrent disease after LEEP, thereby possibly facilitate an attenuated follow‐up schedule for negative patients those at low risk of persistent HPV infection. [ABSTRACT FROM AUTHOR]

For decades, radiofrequency (RF)-induced tissue fusion has garnered great attention due to its potential to replace sutures and staples for anastomosis of tissue reconstruction. However, the complexities of achieving high bonding strength and reducing excessive thermal damage present substantial limitations of existing fusion devices. This study proposed a discrete linkage-type electrode to carry out ex vivo RF-induced intestinal anastomosis experiments. The anastomotic strength was examined by burst pressure and shear strength test. The degree of thermal damage was monitored through an infrared thermal imager. And the anastomotic stoma fused by the electrode was further investigated through histopathological and ultrastructural observation. The burst pressure and shear strength of anastomotic tissue can reach 62.2 ± 3.08 mmHg and 8.73 ± 1.11N, respectively, when the pressure, power and duration are 995 kPa, 160 W and 13 s, and the thermal damage can be controlled within limits. Histopathological and ultrastructural observation indicate that an intact and fully fused stomas with collagenic crosslink can be formed. The discrete linkage-type electrode presents favorable efficiency and security in RF-induced tissue fusion, and these results are informative to the design of electrosurgical medical devices with controllable pressure and energy delivery. [ABSTRACT FROM AUTHOR]

Objective: Electrothermal bipolar vessel sealing devices are electrosurgical devices that seal tissues and blood vessels up to 7 mm in diameter. This paper discusses our experience using electrothermal bipolar vessel sealing devices in transoral head and neck surgery. Methods: Electrothermal bipolar vessel sealing devices were used in five patients with lesions of varying size and type within the pharyngo-larynx. These were treated transorally by the otolaryngology department at the Royal Adelaide Hospital. Either the Medtronic LigaSure or BiZact devices were used for transoral resection, debulking or division of these lesions. Results: Electrothermal bipolar vessel sealing devices were considered helpful in four out of the five cases. Success was dependent on suitable transoral access. A single unsuccessful case reflected the LigaSure jaw's inability to engage a large tumour effectively. Conclusion: Electrothermal bipolar vessel sealing devices can be safely deployed transorally to treat lesions of the upper aero-digestive tract in selected patients. Further studies investigating additional indications would broaden applications of this approach. [ABSTRACT FROM AUTHOR]

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Abstract Considering the increasing demand for personalized surgical care, as well as current healthcare resources limitations, the use of anatomical accurate 3D physical phantoms is becoming increasingly important for the training of surgeons and the test of surgical instruments. A lack of physical models is nowadays denoted regarding the training in electrosurgery, despite its wide diffusion in medical practice. This work reports an extensive characterization of electrosurgical physical phantoms fabricated with tissue‐mimicking ionogels and hydrogels. A careful design of the conductive gels allow the fine tuning of their mechanical and electrical properties, in order to match those of biological tissues. The manufacturing of a novel multi‐material skin stratification bench‐top pad is reported together with its use for training in both cold and electrical surgery. Furthermore, a feasibility study is reported, showing the use of conductive ionogels for simulating the coagulation of cortical vessels during brain surgery.

Electrosurgical electrodes are the main dissecting devices widely used for surgeries throughout the world. The present study aimed to evaluate the thermal injury and safety within animals' organs following a minimally invasive electrosurgery technique with electrosurgical electrode AE40-300 (LIPO) and AE20-80 (LIFT). To ensure the effective application of electrosurgery in a clinical environment, it is crucial to minimize heat-induced injury to nearby tissues. In this study, the skin, liver, kidney, and femoral muscle dissected from 9 minipigs were used in tissue thermal spread experiments. Thermal imaging area analysis, maximum temperature, and time to reach basal temperature were evaluated. Thermography results revealed that the surgical temperature was significantly lower in the minimally invasive electrosurgery with AE40-300 (LIPO) and AE20-80 (LIFT) compared to the predicate device. In addition, AE40-300 (LIPO) and AE20-80 (LIFT) created a relatively small thermal injury area and thermal diffusion. Our results indicated that the tested devices named AE40-300 (LIPO) and AE20-80 (LIFT) reduced excessive thermal injury and could be applied to clinical use safely.

In electro-surgery, surgical smoke was hazard to surgeons and patient in theatre. In order to institute effective countermeasures, quantifying of the effect of tip temperature of electro-surgical unit to surgical smoke distribution in theatre was studied. The relation of tip temperature to power of electro-surgical unit through in vitro cutting experiment. Based on experiment data, the mathematical model was established to simulate the electro-surgery in laminar operation room. As the power of electro-surgical knife increased, the knife tip temperature increased. Total content of (CO, CO2, CH4, NH3) in waste gas and net flow rate of waste gas at outlet increased with the rising temperature of knife tip and formation rate of condensed tar droplets and non-viable particles also increased. Based on simulation, it was found that The maximum height of surgical smoke rising right above the incision of electro-surgical unit was increased with rising temperature of electro-surgical knife tip. There was a spread route of dispersed surgical smoke near the walls of theatre through natural convection. The polynomial fitting relationship was derived. As the tip temperature of knife increased from 200 to 500°C, maximum ascending height of surgical smoke right above the incision position of electro-surgical unit increased from 1.1 m to 1.45 m. When the tip temperature of electro-knife was more 400°C, the CO content in the surgeon's operating zone was more than 200 ppm, which would cause the surgeon's HbCO level increased. As the patient's tissue in the wound during operation was open, when the electro-knife of more than 400°C, the content of condensed tar droplets and in-viable particle was higher than 20 g/m3 and 12 g/m3 in the zone around patient's wound of open tissue, which should be hazard to health of patient. [ABSTRACT FROM AUTHOR]

Simple Summary: The aim of this study was to evaluate the incidence of high-grade glandular pathology in the histological cones of LEEP for CIN3 and to verify the different biological nature of the single CIN3 lesion from CIN3 coexisting with AIS. A sample of 414 women underwent LEEP for CIN3. From the histological examination of the cone, we selected 370 women with a single CIN3, 39 women with CIN3 coexisting with AIS, and 5 women with CIN3 coexisting with AC. Specific HR HPV genotypes and treatment outcome in the study groups were investigated. Women with CIN3 coexisting with AIS showed only four specific HR HPV genotypes (16, 18, 45, 33), the prevalence of genotype 18, the presence of skip lesions (9%), and occult adenocarcinoma (one case of 1A1 adenocarcinoma). Furthermore, CIN3 lesions coexisting with AIS have a higher rate of viral persistence and recurrence than single CIN3 lesions. These characteristics make CIN3 coexisting with AIS closer to the glandular pathology than to the squamous one, making hysterectomy necessary and cervical conization insufficient, which is instead considered the optimal treatment method for a single CIN3. The purpose of this study was to evaluate the incidence of AIS and AC in the histological cone of women treated for CIN3. Furthermore, through the study of the specific HR HPV genotypes, we obtained more information on the possible different nature between the single CIN3 lesion and the CIN3 coexisting with the glandular lesion. Methods. A sample of 414 women underwent LEEP for CIN3. The study sample consisted of 370 women with a CIN3 lesion alone and 44 women with a CIN3 lesion coexisting with AIS or adenocarcinoma. We studied the individual HR HPV genotypes and their frequency in the two groups under study. Furthermore, the therapeutic results and follow-ups for the population were studied on the entire study sample. Results. In patients with a single CIN3 lesion, 11 high-risk genotypes were detected; in patients with CIN3 associated with AIS or AC, only 4 different genotypes were detected (16, 18, 45, 33). Overall, the frequency of HPV 18 was significantly higher in CIN3 coexisting with AIS compared to solitary CIN3 lesions, χ2 = 27.73 (p < 0.001), while the frequency of other high-risk genotypes was significantly higher in patients with a single CIN3 than in patients with CIN3 coexisting with AIS. In our study population, mixed lesions (CIN3 coexisting with AIS), unlike their squamous counterparts (single CIN3 lesions), were characterized by skip lesions, which demonstrate more aggressive behavior and a higher rate of viral persistence and recurrence. Conclusion. A relatively high rate (10.7%) of AIS-AC was found in women treated for CIN3. Our study confirms the multifocal biological nature of the CIN3 lesion coexisting with AIS compared to the single CIN3 lesion. All this justifies the different treatments to which CIN3 lesions coexisting with AIS are addressed; in fact, the latter are treated with hysterectomy, while CIN3 is treated with conization alone. [ABSTRACT FROM AUTHOR]