Efficacy and Safety Evaluation of Energy Devices in Bench Surgery for Pancreas Transplantation.

INTRODUCTION: Bench surgery for the preparation of deceased donor pancreatic grafts is labor-intensive and time-consuming. We hypothesized that energy devices could be used during bench surgery to decrease the bench surgery time. However, because bench surgery has two unique characteristics, wet conditions and no blood flow in the vessels, it is necessary to verify the safety and efficacy under such conditions. METHODS: In an animal tissue model, we validated both ultrasonic and bipolar energy devices: Harmonic Shears and the LigaSure (LS) vessel-sealing device by evaluating heat spread and pressure resistance under bench surgery conditions. In a clinical evaluation of the LS, we compared the outcomes of 22 patients in two different bench surgery groups: with and without the use of the LS. RESULTS: Clinically, the bench surgery time was significantly shorter in the LS group than that in the conventional group (P < 0.001). In the animal tissue experiments, the highest temperature in bench surgery conditions was 60.4°C after 1 s at a 5-mm distance in the LS group. Pressure resistance of ≥ 750 mmHg was achieved in almost all trials in both veins and arteries, with no difference between Harmonic Shears and LS. There was more surgical smoke visually in bench conditions versus in dry conditions and under half bite versus full bite conditions. CONCLUSIONS: The encouraging results of our exploratory clinical and animal studies of the energy devices suggest that they may be useful in the setting of bench surgery.

Hybrid Train-The-Trainer course for the Fundamental Use of Surgical Energy certificates improves self-confidence in knowledge of surgical energy and develops teaching skills: a feasibility study.

BACKGROUND: Several well-trained expert instructors who completed the "Train-The-Trainer (TTT)" course are required to disseminate the safe use of surgical energy devices, which can be learned through the Fundamental Use of Surgical Energy (FUSE) program. This study aimed to explore whether the hybrid FUSE TTT course is feasible and effective, which can improve teaching skills of surgical energy. METHODS: The hybrid TTT course, which was designed to train FUSE-certified personnel as instructors, comprised three virtual sessions spread over 5 h in total and a 1-day in-person training, followed by a 100-min FUSE electrosurgery hands-on workshop in practice as an instructor. The participants reported on self-confidence regarding knowledge of various energy devices or adverse events before, immediately after, and 6 months after the course. Participants and experienced FUSE instructors assessed the trainees' presentation skills at the beginning of the in-person training and after the hands-on workshop. The primary outcomes were the feasibility and completion rate of the entire course. RESULTS: Seventeen participants completed the entire couse; most (94%) were satisfied with the course. Self-confidence in knowledge about various contents improved significantly: the fundamentals of electrosurgery (post, p < 0.001; 6 months, p = 0.01), mechanism and prevention of adverse events (post, p = 0.001; 6 months, p = 0.04), monopolar instruments (post, p = 0.002; 6 months, p = 0.01), bipolar instruments (post, p = 0.01; 6 months, p = 0.06), and integration with other medical devices (post, p = 0.006; 6 months, p = 0.02). The presentation skill index scores of self- and peer assessments improved after the in-person training (self-assessment [pre 44 vs. post 56, p < 0.001], peer assessment [pre 39 vs. post 68, p < 0.001]). CONCLUSIONS: The hybrid TTT course can provide FUSE-certified personnel with an improved self-confidence concerning knowledge of surgical energy and improve their presentation skills with midterm retention. This can help build trainees' self-confidence as instructors.

From FUSE to a hands-on electrosurgery course using a cadaveric model.

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.

Robotic liver parenchymal transection using the SynchroSeal.

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.

Systematic review and meta-analysis of the use of high-energy devices for thyroid surgery.

BACKGROUND: We conducted a systematic review and meta-analysis to evaluate the role of High Energy Devices (HEDs) versus conventional clamp and tie technique in thyroidectomy. This work is endorsed by the Italian Society of Surgical Endoscopy (Italian Society of Endoscopic Surgery and new technologies-SICE) in the broader project on the evaluation of the role of HEDs in different surgical settings with the full health technology assessment report. MEHODS: Inclusion criteria were adult patients (≥ 18 years old) undergoing Thyroidectomy/Parathyroidectomy conducted with High Energy Devices (as ultrasonic (US), radiofrequency (RF), and hybrid energy (H-US/RF)) in the setting of thyroid surgery (both partial and total) for benign and malign diseases. However, some variability was found in included studies and described in the text. This systematic review and meta-analysis were performed according to the Cochrane handbook for systematic reviews, and the recommendations of the 2020 updated Preferred Reporting Items for Systematic reviews and Meta-analyses (PRISMA) guidelines were pursuit. Selection of abstracts was performed in Ryyan system by 2 independent reviewers, and doubts were solved by another independent reviewer. At the end of literature research, Randomized controlled trials and observational studies were included. Risk of Bias was assessed with ROB2 for RCTs, and New Castle Ottawa Scale for Observational studies. RESULTS: The literature search yielded 47 studies, including 29 RCTs and 18 observational studies. Meta-analysis was performed for 29 randomized clinical trials. Outcomes included in the comparison between High Energy Devise and conventional technique groups were operative time, operative blood loss, overall post-operative drainage volume, length of stay, complications, and costs. HED significantly reduced operative time (28 studies, 3097patients; MD -128.8; 95% CI -34.4 to -23.20; I2 = 96%, p < 0.00001, Random-effect), intra-operative blood loss (13 studies, 642 vs 519 patients; SMD -0.82; 95% CI -1.33 to -0.32; I2 = 93%, p < 0.00001, Random-effect), LOS (22 studies, 2808 vs 2789 patients; MD -0.38, 95% CI -0.59 to -0.17; I2 = 98%, p < 0.00001 Random-effect), and healthcare costs (8 studies, 1138 vs 1129 patients, SMD 1.05; 95% CI -0.06 to 2.16; I2 = 99%, p < 0.00001 Random-effect). The rate of overall intraoperative complications was significantly different between both groups (25 studies, 2804 vs 2775 patients; RR 0.88, 95% CI 0.80 to 0.97; I2 = 38%, p = 0.03 Random-effect), but the sensitivity analysis did not find a statistically significant difference (6 studies, 605 vs 594 patients, RR; 95% CI to; I2 = 0%, p = 0.50, Random-effect). There was no difference in the subgroup analysis for the occurrence of transient and permanent RLN palsy, nor hematoma formation and hypocalcaemia. DISCUSSION: Though findings of our systematic review and metanalysis are limited by heterogeneous data, surgeons, hospital managers, and policymakers should note that the use of High Energy Devices compared to conventional clamp and tie technique have reduced operative times, intra-operative blood loss, length of stay, and hospital costs in patients underwent to tyroid surgery. Future work must explore issues of equity to mitigate barriers to patient access to safe thyroid surgical care and define better this initial results.

Comparison of the LigaSure™ bipolar vessel sealer to monopolar electrocoagulation for thoracoscopic lobectomy and lymphadenectomy: a prospective randomized controlled trial.

BACKGROUND: High-energy devices allow better vessel sealing compared with monopolar electrocautery and could improve the outcomes of surgical operations. The objective of the study was to compare tissue dissection by the LigaSure™ device with that by monopolar electrocoagulation for thoracoscopic lobectomy and lymphadenectomy. METHODS: This pragmatic, parallel group, prospective randomized controlled trial was funded by the Medtronic External Research Program (ISR-2016-10,756) and registered at www. CLINICALTRIALS: gov (NCT03125798). The study included patients aged 18 years or older, who had undergone thoracoscopic lobectomy with lymphadenectomy at the Department of Thoracic Surgery of Poznan University of Medical Sciences between May 3, 2018, and November 4, 2021. Using simple randomization, the patients were assigned to undergo tissue dissection with either the LigaSure device (study group) or monopolar electrocautery (control group). Participants and care givers, except operating surgeons, were blinded to group assignment. The primary outcome was postoperative chest drainage volume. Secondary outcomes were change of the esophageal temperature during subcarinal lymphadenectomy and C-reactive protein level 72 h after surgery. RESULTS: Study outcomes were analyzed in 107 patients in each group. We found no differences between the study and control groups in terms of chest drainage volume (550 vs. 600 mL, respectively; p = 0.315), changes in esophageal temperature (- 0.1 °C vs. - 0.1 °C, respectively; p = 0.784), and C-reactive protein levels (72.8 vs. 70.8 mg/L, respectively; p = 0.503). The mean numbers of lymph nodes removed were 12.9 (SD: 3.1; 95% CI, 12.4 to 13.5) in the study group and 11.6 (SD: 3.2; 95% CI, 11.0 to 12.2) in the control group (p < 0.001). CONCLUSIONS: The use of the LigaSure device did not allow to decrease the chest drainage volume, local thermal spread, and systemic inflammatory response. The number of lymph nodes removed was higher in patients operated with the LigaSure device, which indicated better quality of lymphadenectomy.

High-energy devices in different surgical settings: lessons learnt from a full health technology assessment report developed by SICE (Società Italiana di Chirurgia Endoscopica).

BACKGROUND: The present paper aims at evaluating the potential benefits of high-energy devices (HEDs) in the Italian surgical practice, defining the comparative efficacy and safety profiles, as well as the potential economic and organizational advantages for hospitals and patients, with respect to standard monopolar or bipolar devices. METHODS: A Health Technology Assessment was conducted in 2021 assuming the hospital perspective, comparing HEDs and standard monopolar/bipolar devices, within eleven surgical settings: appendectomy, hepatic resections, colorectal resections, cholecystectomy, splenectomy, hemorrhoidectomy, thyroidectomy, esophago-gastrectomy, breast surgery, adrenalectomy, and pancreatectomy. The nine EUnetHTA Core Model dimensions were deployed considering a multi-methods approach. Both qualitative and quantitative methods were used: (1) a systematic literature review for the definition of the comparative efficacy and safety data; (2) administration of qualitative questionnaires, completed by 23 healthcare professionals (according to 7-item Likert scale, ranging from - 3 to + 3); and (3) health-economics tools, useful for the economic evaluation of the clinical pathway and budget impact analysis, and for the definition of the organizational and accessibility advantages, in terms of time or procedures' savings. RESULTS: The literature declared a decrease in operating time and length of stay in using HEDs in most surgical settings. While HEDs would lead to a marginal investment for the conduction of 178,619 surgeries on annual basis, their routinely implementation would generate significant organizational savings. A decrease equal to - 5.25/-9.02% of operating room time and to - 5.03/-30.73% of length of stay emerged. An advantage in accessibility to surgery could be hypothesized in a 9% of increase, due to the gaining in operatory slots. Professionals' perceptions crystallized and confirmed literature evidence, declaring a better safety and effectiveness profile. An improvement in both patients and caregivers' quality-of-life emerged. CONCLUSIONS: The results have demonstrated the strategic relevance related to HEDs introduction, their economic sustainability, and feasibility, as well as the potentialities in process improvement.

Impact of the fundamental use of surgical energy certification on surgeons' behavior and awareness of safe use of energy devices: a cross-sectional survey research.

BACKGROUND: The Fundamental Use of Surgical Energy (FUSE) program was established to educate surgeons and trainees to promote awareness and behaviors for the safe use of surgical energy devices. Despite its implementation, the impact of FUSE certification on surgeons' behavior and safety awareness regarding practice of energy devices remains unclear. This study aimed to identify the perceived impact of FUSE certification on surgeons' behavior and awareness regarding the safe use of surgical energy devices. METHODS: We performed a descriptive cross-sectional survey study, using non probabilistic purposive sampling, and distributed 22-item web-based questionnaires among all 59 FUSE-certified surgeons in Japan, excluding operating room nurses and medical students. The questionnaire items covered demographics, surgical techniques using various energy devices, changes in behavior and safety awareness, communication with colleagues about surgical energy devices, and educational activities related to energy devices. RESULTS: Fifty-seven participants completed the questionnaire (response rate 96.6%). Most surgeons (91.3%) could apply material learned from the FUSE program in practice, especially material related to monopolar electrosurgery. Fifty-six surgeons (98.3%) reported increased awareness of surgical safety, and 35 (61.5%) reported increased communication with operating room personnel about the safe use of energy devices. Moreover, 56 participants (98.3%) indicated a need for systematic education in surgical energy, with participants recommending fellows (94.7% of participants specified that fellows should participate in further education), residents (75.4%), and attending surgeons (63.2%) as the target recipients of this training. Conclusions After FUSE certification, not only did surgeons' knowledge increase, but their energy-related surgical techniques in practice also improved. Furthermore, FUSE-certified surgeons felt that they were more aware of surgical-energy safety and were dedicated to its promotion.

Anti-Freezing Strategies of Electrolyte and their Application in Electrochemical Energy Devices.

Wider scenes of human's activities under low temperature demand promising performance of anti-freezing electrochemical energy devices, and the promotion of performance is mainly limited by electrolyte. However, despite many relevant research works reported, there are still few reviews that systematically and comprehensively summarize these modified approaches and applications. In this focus review, we classify the prominent anti-freezing strategies as high concentration aqueous electrolyte, organic additives, organic electrolyte and others. Relevant research works have been put to clarify their anti-freezing mechanisms and exhibit the modification effects. Besides, various energy devices including metal-air batteries, non-gas batteries and supercapacitors which employed aforementioned strategies are discussed and their key low-temperature performance indexes are summarized to exhibit the advanced research progress. Finally, we put forward some remaining challenges of these modification strategies toward practical application and propose prospects on future development of low-temperature electrochemical energy devices.

Cost analysis of laparoscopic appendectomy in a large integrated healthcare system.

INTRODUCTION: Healthcare expenditure is on the rise placing greater emphasis on operational excellence, cost containment, and high quality of care. Significant variation is seen in operating room (OR) costs with common surgical procedures such as laparoscopic appendectomy. Surgeons can influence cost through the selection of instrumentation for common surgical procedures such as laparoscopic appendectomy. We aimed to quantify the cost of laparoscopic appendectomy in our healthcare system and compare cost variations to operative times and outcomes. METHODS AND PROCEDURES: We performed a retrospective review of laparoscopic appendectomies in a large regional healthcare system during one-year period (2018). Operating room supply costs and procedure durations were obtained for each hospital. The American College of Surgeons National Surgical Quality Improvement Program (NSQIP) outcomes and demographics were compared to the costs for each hospital. RESULTS: A total of 4757 laparoscopic appendectomies were performed at 20 hospitals (27 to 522 per hospital) by 233 surgeons. The average supply cost per case ranged from $650 to $1067. Individual surgeon cost ranged from $197 to $1181. The average operative time was 41 min (range 33 to 60 min). There was no association between lower cost and longer operative time. The patient demographics and comorbidities were similar between sites. There were no significant differences in postoperative complications between high- and low-cost centers. The items with the greatest increase in cost were single-use energy devices (SUD) and endoscopic stapler. We estimate that a saving of over $417 per case is possible by avoiding the use of energy devices and may be as high as $ 984 by adding selective use of staplers. These modifications would result in an annual savings of $1 million for our health system and more than $ 125 million nationwide. CONCLUSION: Performing laparoscopic appendectomy with reusable instruments and finding alternatives to expensive energy devices and staplers can significantly decrease costs and does not increase operative time or postoperative complications.

An advanced bipolar device helps reduce the rate of postoperative pancreatic fistula in laparoscopic gastrectomy for gastric cancer patients: a propensity score-matched analysis.

BACKGROUND: Advanced bipolar devices (ABD; e.g., LigaSure™) have a lower blade temperature than ultrasonically activated devices (USAD; e.g., Harmonic® and Sonicision™) during activation, potentially enabling accurate lymph node dissection with less risk of postoperative pancreatic fistula (POPF) due to pancreatic thermal injury in laparoscopic gastrectomy. Therefore, we compared the efficacy and safety of ABD and USAD in laparoscopic gastrectomy for gastric cancer patients. METHODS: A retrospective cohort study was conducted on patients who underwent laparoscopic distal gastrectomy (LDG) between August 2008 and September 2020. A total of 371 patients were enrolled, and short-term surgical outcomes, including the incidence of ISGPF grades B and C POPF, were compared between ABD and USAD. The risk factors for POPF in LDG were investigated by univariate and multivariate analyses. RESULTS: A propensity score-matching algorithm was used to select 120 patients for each group. The POPF rate was significantly lower (0.8 vs. 9.2%, p < 0.001), the morbidity rate was lower (13.3 vs. 28.3%, p < 0.001), the length of postoperative hospitalization was shorter (14 vs. 19 days, p < 0.001), and the lymph node retrieval rate was higher (34 vs. 26, p < 0.001) with an ABD than with a USAD. There were no mortalities in either group. A multivariate analysis showed that a USAD was the only independent risk factor with a considerably high odds ratio for the occurrence of POPF (USAD/ABD, odds ratio 8.38, p = 0.0466). CONCLUSION: An ABD may improve the safety of laparoscopic gastrectomy for gastric cancer patients.

Proficient One-Step Heat-Up Synthesis of Manganese Sulfide Quantum Dots for Solar Cell Applications.

The necessity to develop renewable energy resources that are highly durable and flexible with superior energy density and capacitance ability has attracted considerable interest in the field of solar cell research. Semiconducting compound materials that are easily available, hazard-free and cost-effective are emerging as potential solutions to tackle this challenge. Herein, we present multiple molecular precursors used to grow manganese sulfide nanoparticles through a proficient one-step heat-up approach. For all of the tested samples, the X-ray diffraction peaks correspond to a γ-MnS hexagonal wurtzite structure. UV-Vis spectroscopy yielded absorption wavelengths of 359-420 nm and band-gap energies of 3.78-4.0 eV. Photoluminescence analysis shows characteristics of red and blue shift from 451-602 nm. High-resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED) reveal a narrow size distribution with nanosticks and large contact areas, which are critical for improved catalytic performance. The current study provides an improved pathway to a well-grown and uniform nanocrystal structure for applications in energy devices.

Repeated partial tissue bite with inadequate cooling time for an energy device may cause thermal injury.

BACKGROUND: Over the past three decades, the use of ultrasonically activated device (USAD) and advanced bipolar device (ABD) has grown in minimally invasive surgeries. However, the thermal profile differences during repeated dissection with different grasping ranges of energy devices, which provide valuable information for preventing thermal injury by energy devices, remain unclear. METHODS: We developed an ex vivo benchtop model to examine the temperature profile of the blade and jaws of two USADs (HARMONIC® ACE + and Sonicision™) and a ABD (Ligasure™ Maryland) with different grasping ranges (partial tissue and full tissue bite) in repeated dissection with minimum cooling time. The maximum temperature, time required for completion to dissection of 10 cm of porcine muscle, thermal spread, and cooling time to reach 60 °C were continuously measured using video thermography. In addition, to evaluate one more grasping range "no tissue", we performed a stress test that activated the USAD without tissue intervention to assess the effects of excessive load on the blade and jaw. RESULTS: Repeated dissection of energy devices with minimal cooling time results in high blade and jaw temperatures proportional to the incision distance. In particular, the USADs with partial tissue bite showed a significantly higher temperatures at the blade and jaw, longer cooling times, and higher lateral thermal spread than those with a full tissue bite and the ABD. The stress test with a USAD showed an extremely high blade temperature exceeding 400 °C, with the tissue pad melting only 13.2 s after activation. CONCLUSION: Although USAD with partial tissue bite help ensure precise dissection, repeated long activation with inadequate cooling time may increase the risk of thermal injury during surgery. These results suggest that surgeons should use energy devices properly while understanding the risks of adjacent organ damage that could result from abuse of the device.

Intra- and postoperative complications using LigaSure™ Small Jaw in patients undergoing thyroidectomy: a register-based study.

PURPOSE: LigaSure™ Small Jaw (LSJ) reduces operation duration and intraoperative blood loss in patients undergoing thyroidectomy. However, the evidence is sparse regarding postoperative complications and among relevant patients subgroups. In a large cohort of patients including relevant patient subgroups, we evaluated intra- and postoperative complications using LSJ. METHODS: Single-centre register-based study evaluating 3346 patients undergoing hemi- or total thyroidectomy. We compared differences in intra- and postoperative complications using LSJ compared to conventional technique. Multivariate analyses were conducted to adjust for potential confounders. RESULTS: Compared to the conventional technique, LSJ was associated with less postoperative drainage (OR 0.4, p = 0.02) and postoperative haemorrhage (OR 0.3, p = 0.02) among patients undergoing hemi- and total thyroidectomy with benign histology, respectively, but with increased risk of postoperative infection [3 (6.4%) vs. 0 (0.0%) patients, p = 0.04] among patients undergoing total thyroidectomy with malignant histology. LSJ was associated with reduced operation duration (- 12.2 min, p < 0.001, - 7.9 min, p < 0.001 and - 13.2 min, p = 0.002) and intraoperative blood loss (- 52.1 ml, p < 0.001, - 13.6 ml, p < 0.001 and - 12.9 ml, p = 0.02) compared to conventional technique among patients undergoing total and hemithyroidectomy with benign histology and hemithyroidectomy with malignant histology, respectively. CONCLUSION: LSJ was associated with a reduced risk of postoperative haemorrhage and less postoperative drainage but increased risk of postoperative infection depending on the type of thyroidectomy and histology of the thyroid gland. LSJ was associated with only a small reduction in operation duration and intraoperative blood loss. TRIAL REGISTRATION: The study was based on data prospectively registered in the Danish national database THYKIR.

Non-energy devices to dissect recurrent laryngeal nerve lymph nodes of non-small cell lung cancer under video-assisted thoracic surgery.

BACKGROUND: Systematic nodal dissection plays a crucial role in improving survival and staging in resectable non-small cell lung cancer (NSCLC) patients but at the cost of increasing the occurrence of recurrent laryngeal nerve injury. Technology should be improved to protect the recurrent laryngeal nerve (RLN) during surgery. METHODS: NSCLC patients who underwent video-assisted thoracic surgery (VATS) surgical treatment by the same surgeon at our hospital from January 2016 to December 2017 were included as the research subjects and were divided into an energy-device group and a non-energy-device group. Their procedures included anatomic pulmonary resection, normative N1 dissection, and systemic N2 dissection. RESULTS: The rate of metastatically involved recurrent laryngeal nerve lymph nodes (RLNLNs) was 5.19% (39/752). Dissection device, side of primary, FEV1, operative time and BMI were independent predictors of recurrent laryngeal nerve injury (RLNI) (hazard ratio (HR) = 3.576, 95% confidence interval (CI): 1.490-8.583, P = 0.004; HR = 0.175, 95% CI: 0.072-0.424, P = < 0.001; HR = 3.008, 95% CI: 1.30-6.927, P = 0.010; HR = 0.328, 95% CI: 0.136-0.794, P = 0.013; HR = 0.344, 95%CI: 0.147-0.801, P = 0.013, respectively). Patients in the non-energy-device group had significantly less RLNI than the energy-device group (P = 0.016) and nearly half of the non-thermal RLNI recovered in 2 weeks (P = 0.025) whereas most thermal RLNI required 3 months for recovery. CONCLUSIONS: Every station of RLNLN had some degree of cancer metastasis in NSCLC patients and when dissecting RLNLNs, dissection device was an independent and artificially controlled predictor of RLNI. Using a non-energy device is a feasible method to protect the RLN as well as an improved recovery time of RLNI.

Mesoporous Carbon Fibers with Tunable Mesoporosity for Electrode Materials in Energy Devices.

To improve the properties of mesoporous carbon (MC), used as a catalyst support within electrodes, MC fibers (MCFs) were successfully synthesized by combining organic-organic self-assembly and electrospinning deposition and optimizing heat treatment conditions. The pore structure was controlled by varying the experimental conditions. Among MCFs, MCF-A, which was made in the most acidic condition, resulted in the largest pore diameter (4-5 nm), and the porous structure and carbonization degree were further optimized by adjusting heat treatment conditions. Then, since the fiber structure is expected to have an advantage when MCFs are applied to devices, MCF-A layers were prepared by spray printing. For the resistance to compression, MCF-A layers showed higher resistance (5.5% change in thickness) than the bulk MC layer (12.8% change in thickness). The through-plane resistance was lower when the fiber structure remained more within the thin layer, for example, +8 mΩ for 450 rpm milled MCF-A and +12 mΩ for 800 rpm milled MCF-A against the gas diffusion layer (GDL) 25BC carbon paper without a carbon layer coating. The additional advantages of MCF-A compared with bulk MC demonstrate that MCF-A has the potential to be used as a catalyst support within electrodes in energy devices.

Steam induced by the activation of energy devices under a wet condition may cause thermal injury.

BACKGROUND: During esophagectomy for esophageal cancer, meticulous attention is needed to prevent thermal injury to the vital organs, such as the recurrent laryngeal nerve (RLN) and tracheobronchus. In order to clarify the novel mechanism behind thermal injury induced by energy devices, we investigated the temperature of steam with the use of two different devices under wet and dry conditions. METHODS: An ultrasonic device (Sonicision™) and a vessel sealing device (Ligasure™) were studied. We evaluated the temperature at the tip of the devices and the steam when the devices were activated under different grasping ranges, under four different combinations of device and muscle, and under four different wet/dry conditions (dry-dry, dry-wet, wet-dry, and wet-wet). RESULTS: Although the maximum temperature of the devices was significantly higher with Sonicision™ than with Ligasure™, the maximum temperature of the steam was significantly higher with Ligasure™ than with Sonicision™ in almost all situations. At 1 mm away from Sonicision™, the critical temperature more than 60 °C was observed only when used with one-third grasping range under the wet-dry or the wet-wet conditions. In case of Ligasure™, high-temperature steam was observed when used with one-third grasping under the wet-dry or the wet-wet condition and two-third grasping under the dry-wet, the wet-dry, or the wet-wet condition. Under the wet condition, the emission of steam from the non-grasping part of Ligasure™ caused a spike in temperature that exceeded the critical temperature. CONCLUSION: We demonstrated that the use of energy devices under a wet condition generates steam from the non-grasping part of the devices. The temperatures of steam from Ligasure™ were significantly higher than that from Sonicision™. To prevent thermal injury to the vital organs, a very attentive and meticulous surgical technique is imperative considering the characteristics of each device.

Harvest of the right gastroepiploic artery graft using a novel hybrid ultrasonic/bipolar energy device.

BACKGROUND: The right gastroepiploic artery (RGEA) is a useful in-situ graft, and skeletonization is effective to prevent spasm and achieve good patency. To harvest the skeletonized RGEA easily, ultrasonic scalpel has been widely used, but the tip shape of conventional ultrasonic device was not optimal for this procedure. Recently, a novel hybrid ultrasonic/bipolar energy device (THUNDERBEAT Open Fine Jaw [TOFJ]) has been developed and is widely used in general surgery. SURGICAL TECHNIQUE: The operator holds forceps in left hand and TOFJ in right hand, incises the anterior layer of the omentum, and extends the incision distally along the RGEA. The side branches and satellite veins were sealed and cut. Because the tip of the TOFJ is well-designed to easily grasp and peel off the tissue, there is no need to change instruments throughout the procedure. After the dissection was advanced distally, the proximal side was subsequently dissected. CONCLUSIONS: This novel device is useful for harvesting skeletonized RGEA.

Lateral thermal spread induced by energy devices: a porcine model to evaluate the influence on the recurrent laryngeal nerve.

BACKGROUND: Recurrent laryngeal nerve (RLN) paralysis is a frequently observed complication after esophagectomy, and thermal injury is considered to be one of the causes. The difference in the lateral thermal spread associated with the grasping range of various energy devices remains unknown. METHODS: Ultrasonic devices (Harmonic® HD1000i and Sonicision™) and a vessel-sealing device (Ligasure™) were studied. We evaluated the temperature of these devices, the activation time required, and the thermal spread on porcine muscle when the devices were used with different grasping ranges (thermal spread study). In addition, we evaluated the influence of thermal spread by short grasping use of the energy devices on the viability of RLN in a live porcine model (NIM study). RESULTS: In the thermal spread study, the temperature of the ultrasonic devices lowered as grasping range increased, whereas the highest temperature of Ligasure was observed when used with two-thirds grasping. The activation time of ultrasonic devices became longer as grasping range increased, whereas the grasping range did not influence the activation time of Ligasure. Thermal spreads 1 mm from the energy devices were unaffected by the grasping ranges. Although the temperature of the Ligasure was lower than that of the ultrasonic devices, thermal spread by Ligasure was significantly greater than that induced by the ultrasonic devices. In the NIM study, the activation of the Sonicision with one-third grasping range did not cause EMG changes at distances of up to 1 mm from the RLN, whereas applying Ligasure with a one-third grasping range 1 mm away from the RLN led to a critical result. CONCLUSIONS: The grasping range did not influence the thermal spread induced by the energy devices. Ultrasonic devices may be safer in terms of lateral thermal spread to the RLN than Ligasure.

Comparison of the efficacy and safety of two advanced vessel sealing technologies in total laparoscopic hysterectomy.

AIM: Adequately powered, randomized controlled studies evaluating efficacy and safety of advanced bipolar energy devices in gynecologic laparoscopic surgery are very few. We aimed to compare the two most commonly used devices in total laparoscopic hysterectomy. METHODS: This randomized controlled trial was carried out in the department of obstetrics and gynecology in an education and research hospital. One hundred thirty-two women who underwent total laparoscopic hysterectomy for benign indications were included. Women with age younger than 18 years, suspected malignancy, stage 3-4 endometriosis and cervical/intraligamentary leiomyoma were excluded. Patients were randomized preoperatively to LigaSure or Articulating Enseal. One experienced surgeon performed all operations. RESULTS: LigaSure was used in 67 patients and Enseal was used in 65 patients. Primary outcomes of the study were operative time (time from start of sealing and transection of the round ligament until completion of colpotomy) and total operative time (time from skin incision to skin closure). Secondary outcomes were intraoperative blood loss (blood lost during operative time period) and perioperative complications. Operative time was significantly shorter in LigaSure group (P = 0.001). Total operative time, intraoperative blood loss and perioperative complications were similar. When two groups were further classified according to uterine weight taking 300 g as cut-off value, operative time was significantly shorter in LigaSure group in both subgroups (P = 0.003 and P = 0.007). CONCLUSION: LigaSure use in total laparoscopic hysterectomy shortens operative time when compared with Enseal; without an apparent increase in intraoperative blood loss and perioperative complications. On the other side, total operative time remains unaffected.