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Background Surgical readmissions are clinically and financially problematic. Our purpose is to determine if a decrease in postoperative ambulation (steps/day) is associated with hospital readmission. Methods In this prospective cohort study, patients undergoing elective operations wore an accelerometer activity tracker to measure steps/day for 28 consecutive postoperative days. The primary outcome was hospital readmission. The change in steps/day over two consecutive days prior to the day of the readmission were examined. Predetermined thresholds for decreases of consecutive daily ambulation levels were used to calculate sensitivity and specificity for the outcome of hospital readmission. Results 215 patients (aged 63 ± 12 years) were included. Readmission occurred in 10% (n = 21). For each of the first 28-postoperative days, the entire cohort had an average daily step increase of 136 ± 146 steps/day (Spearman correlation rho = 0.990; p 50% from the prior day had a 79% sensitivity and 90% specificity for hospital readmission. Conclusions A decrease of >50% daily ambulation (steps/day) over two consecutive post-discharge days accurately forecasts hospital readmission. The implications of these findings are that monitoring daily ambulation could serve as a form of outpatient telemetry aiding to forecast post-surgical readmissions.

Background: Surgeons must evaluate and communicate the risk associated with operative procedures for patients at high risk of poor postoperative outcomes. Multidisciplinary approaches to complex decision making are needed. Objective: To improve physician decision making for high-risk surgical patients. Design: This is a retrospective review of patients presented to a multidisciplinary committee for three years. Setting/Subjects: Evaluation of patients was done in a single-center U.S. veterans affairs (VA) hospital. All patients who were considered for surgery had a VA Surgical Quality Improvement Program (VASQIP) risk calculator 30-day mortality >5%. Measurements: Thirty-day and one-year mortality were measured. Results: Seventy-six patients were reviewed with an average expected 30-day mortality of 14.2%. Forty-two patients (57%) had a recommended change in the care plan before surgery. Fifty-four patients (71%) proceeded with surgery and experienced a 30-day mortality of 7.4%. Conclusions and Relevance: Multidisciplinary discussion of high-risk surgical patients may help surgeons make perioperative recommendations for patients. Implementation of a multidisciplinary high-risk committee should be considered at facilities that manage high-risk surgical patients.

Recovery of preoperative ambulation levels 1 month after surgery represents an important patient-centered outcome. The objective of this study is to identify clinical factors associated with the inability to regain baseline preoperative ambulation levels 28 days postoperatively. This is a prospective cohort study enrolling patients scheduled for elective inpatient abdominal operations. Daily ambulation (steps/day) was measured with a wristband accelerometer. Preoperative steps were recorded for at least 3 full calendar days before surgery. Postoperatively, daily steps were recorded for at least 28 days. The primary outcome was delayed recovery of ambulation, defined as inability to achieve 50% of preoperative baseline steps at 28 days postoperatively. A total of 108 patients were included. Delayed recovery (

The COVID-19 pandemic has brought many challenges including barriers to delivering high-quality surgical care and follow-up while minimizing the risk of infection. Telehealth has been increasingly utilized for post-operative visits, yet little data exists to guide surgeons in its use. We sought to determine safety and efficacy of telehealth follow-up in patients undergoing cholecystectomy during the global pandemic at a VA Medical Center (VAMC).This was a retrospective review of patients undergoing cholecystectomy at a level 1A VAMC over a 2-year period from August 2019 to August 2021. Baseline demographics, post-operative complications, readmissions, emergency department (ED) visits and need for additional procedures were reviewed. Patients who experienced a complication prior to discharge, underwent a concomitant procedure, had non-absorbable skin closure, had new diagnosis of malignancy or were discharged home with drain(s) were ineligible for telehealth follow-up and excluded.Over the study period, 179 patients underwent cholecystectomy; 30 (17%) were excluded as above. 20 (13%) missed their follow-up, 52 (35%) were seen via telehealth and 77 (52%) followed-up in person. There was no difference between the two groups regarding baseline demographics or intra-operative variables. There was no significant difference in post-operative complications [4 (8%) vs 6 (8%), p 0.99], ED utilization [5 (10%) vs 7 (9%), p = 0.78], 30-day readmission [3 (6%) vs 6 (8%), p = 0.74] or need for additional procedures [2 (4%) vs 4 (5%), p = 0.41] between telehealth and in-person follow-up.Telehealth follow-up after cholecystectomy is safe and effective in Veterans. There were no differences in outcomes between patients that followed up in-person vs those that were seen via phone or video. Routine telehealth follow-up after uncomplicated cholecystectomy should be considered for all patients.

More than 3 million patients have a cardiac implanted electronic device (CIED) such as a pacemaker or implanted cardioverter-defibrillator in the USA. These devices are susceptible to electromagnetic interference (EMI) leading to malfunction and injury. Radiofrequency energy, the most common modality for obtaining hemostasis during endoscopy, is the most common source of EMI. Few studies have evaluated the effect of endoscopic radiofrequency energy on CIEDs. We aim to characterize CIED dysfunction related to endoscopic procedures. We hypothesize that EMI from endoscopic energy can result in patient injury. We queried the Manufacturer and User Facility Device Experience (MAUDE) database for CIED dysfunction related to electrosurgical devices over a 10-year period (2009–2019). CIED dysfunction events were identified using seven problem codes (malfunction, electromagnetic interference, ambient noise, pacing problem, over-sensing, inappropriate shock, defibrillation). These were cross-referenced for the terms “cautery, electrocautery, endoscopy, esophagus, colonoscopy, colon, esophagoscopy, and esophagogastroduodenoscopy.” Reports were individually reviewed to confirm and characterize CIED malfunction due to an endoscopic procedure. A search for CIED dysfunction resulted in 43,759 reports. Three hundred and eleven reports (0.7%) were associated with electrocautery, and of these, 45 reports (14.5%) included endoscopy. Ten reports involving endoscopy (22%) specified upper (3, 7%) or lower (7, 16%) endoscopy while the remainder were non-specific. Twenty-six of reports involving endoscopy (58%) suffered injury because of CIED dysfunction: Of these, 17 (65%) received inappropriate shocks, 5 (19%) had pacing inhibition with bradycardia or asystole, 3 (12%) had CIED damage requiring explant and replacement, and 1 (4%) patient suffered ventricular tachycardia requiring hospital admission. The use of energy during endoscopy can cause dysfunction of CIEDs. This most commonly results in inappropriate defibrillation, symptomatic bradycardia, and asystole. Patients with CIEDs undergoing endoscopy should undergo pre- and post-procedure device interrogation and re-programming to avoid patient injury.

Stray energy transfer from surgical monopolar radiofrequency energy instruments can cause unintended thermal injuries during laparoscopic surgery. Single-incision laparoscopic surgery transfers more stray energy than traditional laparoscopic surgery. There is paucity of published data concerning stray energy during single-incision robotic surgery. The purpose of this study was to quantify stray energy transfer during traditional, multiport robotic surgery (TRS) compared to single-incision robotic surgery (SIRS). An in vivo porcine model was used to simulate a multiport or single-incision robotic cholecystectomy (DaVinci Si, Intuitive Surgical, Sunnyvale, CA). A 5 s, open air activation of the monopolar scissors was done on 30 W and 60 W coag mode (ForceTriad, Covidien-Medtronic, Boulder, CO) and Swift Coag effect 3, max power 180 W (VIO 300D, ERBE USA, Marietta, GA). Temperature of the tissue (°C) adjacent to the tip of the assistant grasper or the camera was measured with a thermal camera (E95, FLIR Systems, Wilsonville, OR) to quantify stray energy transfer. Stray energy transfer was greater in the SIRS setup compared to TRS setup at the assistant grasper (11.6 ± 3.3 °C vs. 8.4 ± 1.6 °C, p = 0.013). Reducing power from 60 to 30 W significantly reduced stray energy transfer in SIRS (15.3 ± 3.4 °C vs. 11.6 ± 3.3 °C, p = 0.023), but not significantly for TRS (9.4 ± 2.5 °C vs. 8.4 ± 1.6 °C, p = 0.278). The use of a constant voltage regulating generator also minimized stray energy transfer for both SIRS (0.7 ± 0.4 °C, p

Stray energy transfer from monopolar radiofrequency energy during laparoscopy can be potentially catastrophic. Robotic surgery is increasing in popularity; however, the risk of stray energy transfer during robotic surgery is unknown. The purpose of this study was to (1) quantify stray energy transfer using robotic instrumentation, (2) determine strategies to minimize the transfer of energy, and (3) compare robotic stray energy transfer to laparoscopy. In a laparoscopic trainer, a monopolar instrument (L-hook) was activated with DaVinci Si (Intuitive, Sunnyvale, CA) robotic instruments. A camera and assistant grasper were inserted to mimic a minimally invasive cholecystectomy. During activation of the L-hook, the non-electric tips of the camera and grasper were placed adjacent to simulated tissue (saline-soaked sponge). The primary outcome was change in temperature from baseline (°C) measured nearest the tip of the non-electric instrument. Simulated tissue nearest the robotic grasper increased an average of 18.3 ± 5.8 °C; p

Perforation is a known complication of endoscopic resection and has been managed with endoscopic defect closure, antibiotics and close observation. Closure of duodenal perforations are more challenging due to the presence of gastric and pancreaticobiliary secretions. The use of endoluminal vacuum therapy (EVT) to divert flow and aid closure is increasingly prevalent and may avoid high-risk surgery. We describe the use of endoluminal vacuum closure to salvage an iatrogenic duodenal perforation in a 57-year-old male who underwent an endoscopic mucosal resection of a 35-mm polypoid lesion on the posterior wall of the second portion of the duodenum. The endoluminal wound vac successfully controlled leakage and allowed defect closure. EVT is an emerging technique that can effectively manage complicated injuries throughout the GI tract and may allow enhanced recovery by avoiding surgical salvage and its associated morbidity and mortality.

Stray energy from surgical energy instruments can cause unintended thermal injuries. There are no published data regarding electrosurgical generators and their influence on stray energy transfer during robotic surgery. There are two approved generators for the DaVinci Xi robotic platform: a constant-voltage regulating generator (cVRG) and a constant-power regulating generator (cPRG). The purpose of this study was to quantify and compare stray energy transfer in the robotic Xi platform using a cVRG versus a cPRG.An ex vivo bovine model was used to simulate a standard multiport robotic surgery. The DaVinci Xi (Intuitive Surgical, Sunnyvale, CA) robotic platform was attached to a trainer box using robotic ports. A 5 s, open-air activation of the monopolar scissors was done with commonly used electrosurgical settings using a cPRG (ForceTriad, Covidien-Medtronic, Boulder, CO) or cVRG (ERBE VIO 300 dV 2.0, ERBE USA, Marietta, GA). Stray energy transfer was quantified as the change in tissue temperature (°C) nearest the tip of the assistance grasper (which was not in direct contact with the active monopolar scissors).Stray energy transfer occurred with both generators. Utilizing common, comparable settings for standard coagulation, significantly less stray energy was transferred with the cVRG versus cPRG (4.4 ± 1.6 °C vs. 41.1 ± 13.0 °C, p 0.001). Similarly, less stray energy was transferred using cut modes with the cVRG compared to the cPRG (5.61 ± 1.79 °C vs. 33.9 ± 18.4 °C, p 0.001).Stray energy transfer increases tissue temperatures more than 45C in the DaVinci Xi robotic platform. Low voltage modalities, such as cut or blend; as well as a cVRG generator, significantly reduces stray energy. Robotic surgeons can minimize the risk of stray energy injuries by using these low risk modes and/or generator.

Enteral access is required for a variety of reasons from neuromuscular disorders to dysphagia. Gastrostomy tubes (GTs) can be placed endoscopically, surgically, or radiographically and complications include infection, bleeding, leakage and unintentional removal. Routine post-procedural follow-up is limited by inconsistent guidelines and management by different specialty teams. We established a dedicated GT clinic to provide continuity of care and prophylactic GT exchange. We hypothesized that patients followed in the GT clinic would have reduced Emergency Department (ED) utilization.A retrospective review of patients who underwent GT placement from January 2010 to January 2020 was conducted. Baseline demographics, indications for GT placement, number and reason for ED visits and utilization of a multidisciplinary GT clinic were studied.A total of 97 patients were included. The most common indication for placement was dysphagia (88, 91%) and the most common primary diagnosis was head and neck malignancy (51, 51%). The GT clinic is a multidisciplinary clinic staffed by surgeons and residents, dieticians, and wound care specialists and cared for 16 patients in this study. Three patients (19%) in the GT clinic group required ED visits compared to 44 (54%) in the standard of care (SOC) group (p 0.05). There was an average of 0.9 ED visits per patient (range 0-7) in the GT clinic group vs 1.6 ED visits per patient (range 0-20) in the SOC group (p = 0.34). Feeding tubes were prophylactically exchanged an average of 7 times per patient in the GT clinic group vs 3 times per patient in the SOC group (p 0.05).A multidisciplinary clinic dedicated to GT care limits ED visits for associated complications by more than 50%. Follow-up in a dedicated clinic with prophylactic tube exchange decreases ED visits and should be considered at facilities that care for patients with GTs.

Screening colonoscopy is one of the few procedures that can prevent cancer. While the majority of colonoscopies in the USA are performed by gastroenterologists, general surgeons play a key role in at-risk, rural populations. The aim of this study was to examine geographic practice patterns in colonoscopy using a nationwide Medicare claims database.The 2017 Medicare Provider Utilization and Payment database was used to identify physicians performing colonoscopy. Providers were classified as gastroenterologists, surgeons, ambulatory surgical centers (ASCs), or other. Rural-Urban Commuting Area classification at the zip code level was used to determine whether the practice location for an individual provider was in a rural area/small town (lt; 10,000 people), micropolitan area (10-50,000 people), or metropolitan area (gt; 50,000 people).Claims data from 3,861,187 colonoscopy procedures on Medicare patients were included. The majority of procedures were performed by gastroenterologists (57.2%) and ASCs (32.1%). Surgeons performed 6.8% of cases overall. When examined at a zip code level, surgeons performed 51.6% of procedures in small towns/rural areas and 21.7% of procedures in micropolitan areas. Individual surgeons performed fewer annual procedures as compared to gastroenterologists (median 51 vs. 187, p lt; 0.001).Surgeons perform the majority of colonoscopies in rural zip codes on Medicare patients. High-quality, surgical training in endoscopy is essential to ensure access to colonoscopy for patients outside of major metropolitan areas.

The Fundamental Use of Surgical Energy (FUSE) program was developed by The Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) to promote the safe use of surgical energy. A curriculum that could be used in hospital educational programs was needed to expand access. The goal of this project was to develop a short, inexpensive, online module that emphasizes key FUSE learning objectives. The accompanying survey assessed perceived relevancy.The SAGES FUSE Committee developed the Hospital Compliance Module. The target audience included all OR personnel. The Module was piloted at Beth Israel Deaconess Medical Center. The data were analyzed using Chi-square with Yates' correction two-tailed test.Three-hundred-eighty individuals completed the survey: 198 (52%) surgeons, 139 (37%) nurses, 28 (7%) surgical technicians, and 15 (4%) house staff. For "…the Module taught me valuable information" 155 (41%) responded extremely and 350 (92%) responded at least somewhat. For "As a result of [the Module] how likely are you to change how you set up or use energy devices…?" 103 (27%) responded extremely and 305 (80%) responded at least somewhat. For "How likely are you to recommend this compliance module…?" 143 (38%) responded extremely and 333 (88%) responded at least somewhat.The FUSE Hospital Compliance Module is effective and efficient. It should be considered for widespread distribution by hospitals to enhance staff education.

Optimization of preoperative nutritional status has been recommended and associated with improved outcomes for other oncologic procedures, but has not been studied in patients undergoing pelvic exenteration.A retrospective chart review of 199 patients was conducted. Overall survival (OS) was calculated using the Kaplan-Meier method and multivariate analysis was performed with Cox proportional hazards.199 patients underwent PE with 61 (31%), 78 (40%) and 58 (29%) patients having colorectal, gynecologic and urologic histological diagnoses, respectively. Median OS following PE was 25 months. Preoperative serum albumin3.5 g/dL was associated with worsened OS (HR 1.661; 95% CI 1.052-2.624) as well as increased incidence of any postoperative complication (85.9% vs 72.3%, p = 0.034), but was not associated with 90-day mortality (11.3% vs 7.9%, p = 0.457).Poor preoperative nutritional status is associated with increased complications and decreased OS. Surgeons should maximize preoperative nutritional status to improve perioperative outcomes and long-term survival.

Surgical fires are a rare event that still occur at a significant rate and can result in severe injury and death. Surgical fires are fueled by vapor from alcohol-based skin preparations in the presence of increased oxygen concentration and a spark from an energy device. Carbon dioxide (CO2) is used to extinguish electrical fires, and we sought to evaluate its effect on fire creation in the operating room. We hypothesize that CO2 delivered by the energy device will decrease the frequency of surgical fires fueled by alcohol-based skin preparations. An ex vivo model with 15 × 15 cm section of clipped, porcine skin was used. A commercially available electrosurgical pencil with a smoke evacuation tip was connected to a laparoscopic CO2 insufflation system. The electrosurgical pencil was activated for 2 s at 30 watts coagulation mode immediately after application of alcohol-based surgical skin preparations: 70% isopropyl alcohol with 2% chlorhexidine gluconate (CHG-IPA) or 74% isopropyl alcohol with 0.7% iodine povacrylex (Iodine-IPA). CO2 was infused via the smoke evacuation pencil at flow rates from 0 to 8 L/min. The presence of a flame was determined visually and confirmed with a thermal camera (FLIR Systems, Boston, MA). Carbon dioxide eliminated fire formation at a flow rate of 1 L/min with CHG-IPA skin prep (0% vs. 60% with no CO2, p

OBJECTIVES/BACKGROUND The Geriatric Surgery Verification (GSV) Program promotes clinical standards aimed to optimize the quality of surgical care delivered to older adults. The purpose of this study was to determine if preliminary implementation of the GSV Program standards improves surgical outcomes. DESIGN Prospective study with cohort matching. SETTING Data from a single institution compared with a national data set cohort. PARTICIPANTS All patients aged ≥75 years undergoing inpatient operations between January 2018 and December 2019 were included. Cohort matching by age and procedure code was performed using a national data set. MEASUREMENTS Baseline pre- and intraoperative characteristics prospectively recorded using Veterans Affairs Surgical Quality Improvement Program (VASQIP) variable definitions. Postoperative outcomes were recorded including complications as defined by VASQIP, 30-day mortality, and length of stay. RESULTS A total of 162 patients participated in the GSV program, and 308 patients comprised the matched comparison group. There was no difference in postoperative occurrence of one or more complications (p = 0.81) or 30-day mortality (p = 0.61). Patients cared for by the GSV Program had a reduced postoperative length of stay (median 4 days [range 1,31] vs. 5 days [range 1,86]; p

AI and BERT (Bidirectional Encoder Representations from Transformers) have been increasingly adopted in the human resources (HR) industry for recruitment. The increased efficiency (e.g., fairness) will help remove biases in machine learning, help organizations find a qualified candidate, and remove bias in the labor market. BERT has further improved the performance of language representation models by using an auto-encoding model which incorporates larger bidirectional contexts. However, BERT’s underlying mechanisms that enhance its effectiveness, such as tokenization, masking, and leveraging the attention mechanism to compute vector score, are not well understood.

Stray energy transfer from surgical monopolar radiofrequency energy instruments can cause unintended thermal injuries during laparoscopic surgery. Single-incision laparoscopic surgery transfers more stray energy than traditional laparoscopic surgery. There is paucity of published data concerning stray energy during single-incision robotic surgery. The purpose of this study was to quantify stray energy transfer during traditional, multiport robotic surgery (TRS) compared to single-incision robotic surgery (SIRS).An in vivo porcine model was used to simulate a multiport or single-incision robotic cholecystectomy (DaVinci Si, Intuitive Surgical, Sunnyvale, CA). A 5 s, open air activation of the monopolar scissors was done on 30 W and 60 W coag mode (ForceTriad, Covidien-Medtronic, Boulder, CO) and Swift Coag effect 3, max power 180 W (VIO 300D, ERBE USA, Marietta, GA). Temperature of the tissue (°C) adjacent to the tip of the assistant grasper or the camera was measured with a thermal camera (E95, FLIR Systems, Wilsonville, OR) to quantify stray energy transfer.Stray energy transfer was greater in the SIRS setup compared to TRS setup at the assistant grasper (11.6 ± 3.3 °C vs. 8.4 ± 1.6 °C, p = 0.013). Reducing power from 60 to 30 W significantly reduced stray energy transfer in SIRS (15.3 ± 3.4 °C vs. 11.6 ± 3.3 °C, p = 0.023), but not significantly for TRS (9.4 ± 2.5 °C vs. 8.4 ± 1.6 °C, p = 0.278). The use of a constant voltage regulating generator also minimized stray energy transfer for both SIRS (0.7 ± 0.4 °C, p 0.001) and TRS (0.7 ± 0.4 °C, p 0.001).More stray energy transfer occurs during single-incision robotic surgery than multiport robotic surgery. Utilizing a constant voltage regulating generator minimized stray energy transfer for both setups. These data can be used to guide robotic surgeons in their use of safe, surgical energy.

The SAGES Fundamental Use of Surgical Energy (FUSE) program accompanied by a bench-top simulation has shown to improve knowledge of the safe use of energy devices. However, there are significant barriers and costs associated with delivering an effective structured simulation curriculum to a widespread international audience. The purpose of this study was to evaluate if bench-top simulation FUSE curriculum through telementoring is as effective as a live-in house proctor for electrosurgical training. A two-armed multi-institutional randomized controlled trial was designed, including a 1-h didactic electrosurgery course (FUSE curriculum), followed by a structured 1-h bench-top simulation training session. For the simulation, participants were randomized to either a live proctor who delivered the course on-site (LIVE group), or a proctor from a remote location using videoconferencing platform (TELEM group). Pre- and post-curriculum (immediate and 6 months) knowledge and self-perceived comfort and competence were assessed. Data are expressed as median [interquartile range], *p < 0.05. Sixty-five (35 LIVE; 30 TELEM) surgical trainees from three institutions participated. Baseline characteristics were similar. Total score on the exam improved from 47% [40–54] to 78% [71–84]* amongst all participants, with similar immediate post-curriculum scores in the LIVE group compared to the TELEM group (77% [69–83] vs 80% [75–85]). At 6 months, performance on the exam declined significantly for both groups, but remained similar between the two (LIVE: 59% [51–71] vs TELEM: 71% [57–77]). Participants in both groups reported feeling greater comfort and competence post-curriculum (immediate and at 6 months) compared to baseline, with no difference between the two groups. A bench-top simulation FUSE course delivered via a telementoring platform seems to improve surgical trainees’ knowledge and comfort in the safe use of electrosurgical devices as effectively as when it is delivered by a live proctor, despite long-term decay for both methods.

More than 3 million patients have a cardiac implanted electronic device (CIED) such as a pacemaker or implanted cardioverter-defibrillator in the USA. These devices are susceptible to electromagnetic interference (EMI) leading to malfunction and injury. Radiofrequency energy, the most common modality for obtaining hemostasis during endoscopy, is the most common source of EMI. Few studies have evaluated the effect of endoscopic radiofrequency energy on CIEDs. We aim to characterize CIED dysfunction related to endoscopic procedures. We hypothesize that EMI from endoscopic energy can result in patient injury.We queried the Manufacturer and User Facility Device Experience (MAUDE) database for CIED dysfunction related to electrosurgical devices over a 10-year period (2009-2019). CIED dysfunction events were identified using seven problem codes (malfunction, electromagnetic interference, ambient noise, pacing problem, over-sensing, inappropriate shock, defibrillation). These were cross-referenced for the terms "cautery, electrocautery, endoscopy, esophagus, colonoscopy, colon, esophagoscopy, and esophagogastroduodenoscopy." Reports were individually reviewed to confirm and characterize CIED malfunction due to an endoscopic procedure.A search for CIED dysfunction resulted in 43,759 reports. Three hundred and eleven reports (0.7%) were associated with electrocautery, and of these, 45 reports (14.5%) included endoscopy. Ten reports involving endoscopy (22%) specified upper (3, 7%) or lower (7, 16%) endoscopy while the remainder were non-specific. Twenty-six of reports involving endoscopy (58%) suffered injury because of CIED dysfunction: Of these, 17 (65%) received inappropriate shocks, 5 (19%) had pacing inhibition with bradycardia or asystole, 3 (12%) had CIED damage requiring explant and replacement, and 1 (4%) patient suffered ventricular tachycardia requiring hospital admission.The use of energy during endoscopy can cause dysfunction of CIEDs. This most commonly results in inappropriate defibrillation, symptomatic bradycardia, and asystole. Patients with CIEDs undergoing endoscopy should undergo pre- and post-procedure device interrogation and re-programming to avoid patient injury.

Stray energy transfer from monopolar radiofrequency energy during laparoscopy can be potentially catastrophic. Robotic surgery is increasing in popularity; however, the risk of stray energy transfer during robotic surgery is unknown. The purpose of this study was to (1) quantify stray energy transfer using robotic instrumentation, (2) determine strategies to minimize the transfer of energy, and (3) compare robotic stray energy transfer to laparoscopy.In a laparoscopic trainer, a monopolar instrument (L-hook) was activated with DaVinci Si (Intuitive, Sunnyvale, CA) robotic instruments. A camera and assistant grasper were inserted to mimic a minimally invasive cholecystectomy. During activation of the L-hook, the non-electric tips of the camera and grasper were placed adjacent to simulated tissue (saline-soaked sponge). The primary outcome was change in temperature from baseline (°C) measured nearest the tip of the non-electric instrument.Simulated tissue nearest the robotic grasper increased an average of 18.3 ± 5.8 °C; p 0.001 from baseline. Tissue nearest the robotic camera tip increased (9.0 ± 2.1 °C; p 0.001). Decreasing the power from 30 to 15 W (18.3 ± 5.8 vs. 2.6 ± 2.7 °C, p 0.001) or using low-voltage cut mode (18.3 ± 5.8 vs. 3.1 ± 2.1 °C, p 0.001) reduced stray energy transfer to the robotic grasper. Desiccating tissue, in contrast to open air activation, also significantly reduced stray energy transfer for the grasper (18.3 ± 5.8 vs. 0.15 ± 0.21 °C, p 0.001) and camera (9.0 ± 2.1 vs. 0.24 ± 0.34 °C, p 0.001).Stray energy transfer occurs during robotic surgery. The assistant grasper carries the highest risk for thermal injury. Similar to laparoscopy, stray energy transfer can be reduced by lowering the power setting, utilizing a low-voltage cut mode instead of coagulation mode and avoiding open air activation. These practical findings can aid surgeons performing robotic surgery to reduce injuries from stray energy.

Surgical smoke evacuators may reduce the concentration of alcohol vapors from skin preparations at the site of electrosurgical device activation, decreasing operating room fire risk. Our aim was to compare the incidence of flames with and without smoke evacuation in a porcine ex vivo model. A monopolar device was activated after application of either 70% isopropyl alcohol/2% chlorhexidine gluconate (CHG-IPA) or 74% isopropyl alcohol/0.7% iodine povacrylex (iodine-IPA) skin preparations. No suction was compared with standard wall suction and 2 monopolar devices with built-in smoke evacuators. Flames were generated in 60% of CHG-IPA and 47% of iodine-IPA tests without suction. Wall suction did not significantly reduce fires (CHG-IPA 43% vs. 60%, P=0.30; iodine-IPA 57% vs. 47%, P=0.61). Use of both smoke evacuation devices reduced fires for CHG-IPA (17% vs. 60%, P=0.001 and 20% vs. 60%, P=0.004) but not for iodine-IPA. Smoke evacuation devices reduce fire risk when used with a chlorhexidine-alcohol skin preparation.