The Impact of Food Insecurity Rate on Bariatric Surgery Outcomes.

INTRODUCTION: Various factors impact outcomes following bariatric surgery. Lack of access to healthy food options (food insecurity [FI]) is another potential factor affecting outcomes. No prior studies have directly explored the relationship between residing in a high FI zip code and patient outcomes relating to weight loss after bariatric surgery. We hypothesized that living in a high FI zip code would be associated with decreased weight loss postsurgery. METHODS: We conducted a retrospective study with 210 bariatric surgery patients at a tertiary referral center from January to December 2020. Patient weight and body mass index (BMI) were recorded at three time points: surgery date, 1 mo, and 12 mo postoperative. Residential addresses were collected, and FI rates for the corresponding Zip Code Tabulation Areas were obtained from the 2022 Feeding America Map the Meal Gap study (2020 data). RESULTS: The FI rate showed a negative correlation of -18.3% (95% confidence interval: -35% to -0.5%; P = 0.039) with the percentage of excess weight loss (%EWL) at 1 y. In multivariate analysis, preoperative BMI (P = 0.001), presence of diabetes mellitus (P = 0.008), and bariatric procedure type (P = 0.000) were significant predictors of %EWL at 1 y. After adjusting for confounding factors, including sex, preoperative BMI, insurance status, primary bariatric procedure, and emergency department visits, the increased FI rate (P = 0.047) remained significantly associated with a decreased %EWL at 1 y. CONCLUSIONS: Residing in a high FI, Zip Code Tabulation Areas correlated with a decreased %EWL at 1 y after bariatric surgery. These findings highlight the importance of assessing FI status in pre-bariatric surgery patients and providing additional support to individuals facing FI.

A Delphi Method for Development of a Barrett's Esophagus Question Prompt List as a Communication Tool for Optimal Patient-physician Communication.

BACKGROUND METHODS: The question prompt list content was derived through a modified Delphi process consisting of 3 rounds. In round 1, experts provided 5 answers to the prompts "What general questions should patients ask when given a new diagnosis of Barrett's esophagus" and "What questions do I not hear patients asking, but given my expertise, I believe they should be asking?" Questions were reviewed and categorized into themes. In round 2, experts rated questions on a 5-point Likert scale. In round 3, experts rerated questions modified or reduced after the previous rounds. Only questions rated as "essential" or "important" were included in Barrett's esophagus question prompt list (BE-QPL). To improve usability, questions were reduced to minimize redundancy and simplified to use language at an eighth-grade level (Fig. 1). RESULTS: Twenty-one esophageal medical and surgical experts participated in both rounds (91% males; median age 52 years). The expert panel comprised of 33% esophagologists, 24% foregut surgeons, and 24% advanced endoscopists, with a median of 15 years in clinical practice. Most (81%), worked in an academic tertiary referral hospital. In this 3-round Delphi technique, 220 questions were proposed in round 1, 122 (55.5%) were accepted into the BE-QPL and reduced down to 76 questions (round 2), and 67 questions (round 3). These 67 questions reached a Flesch Reading Ease of 68.8, interpreted as easily understood by 13 to 15 years olds. CONCLUSIONS: With multidisciplinary input, we have developed a physician-derived BE-QPL to optimize patient-physician communication. Future directions will seek patient feedback to distill the questions further to a smaller number and then assess their usability.

A cost comparison of GLP-1 receptor agonists and bariatric surgery: what is the break even point?

BACKGROUND: With the prevalence of obesity rising in the US, medical management is of increasing importance. Two popular options for the treatment of obesity are bariatric surgery (e.g. sleeve gastrectomy and Roux-en-Y gastric bypass) and the increasingly popular GLP-1 Receptor Agonists (GLP-1 s). This study examines the initial and long-term costs of GLP-1 s compared to bariatric surgery. STUDY DESIGN: We compared average 2023 national retail prices for GLP-1 s to surgical cost estimates from 2015 adjusted for inflation. We then plotted the cumulative medication cost over time against the flat cost of each surgery, thus calculating "break-even points" (when medication costs equal surgery costs). The findings revealed a crucial insight, for some GLP-1 s like Saxenda and Wegovy, the high cost of ongoing use surpasses the cost of RYGB in less than a year and sleeve gastrectomy within nine months. Even the most affordable option, Byetta, becomes costlier than surgery after around 1.5 years. RESULTS: This highlights the importance of looking beyond the initial financial investment when considering cost-effectiveness. Additionally, while not directly assessed, this study acknowledges that GLP-1 s take time to reach full effectiveness, potentially delaying weight loss while accumulating costs. Concerns also exist about weight regain after discontinuing the medication. CONCLUSION: This study is limited by the real-world variation for individual treatment costs (e.g. insurance), a limited evaluation of long-term costs associated with either treatment modality and their co-morbidities, and the reality of patient preference providing subjective value to either modality. Overall, the study offers insights into the financial trade-offs between GLP-1 s and bariatric surgery.

Current trends and barriers to video management and analytics as a tool for surgeon skilling.

BACKGROUND: The benefits of intraoperative recording are well published in the literature; however, few studies have identified current practices, barriers, and subsequent solutions. The objective of this study was to better understand surgeon's current practices and perceptions of video management and gather blinded feedback on a new surgical video recording product with the potential to address these barriers effectively. METHODS: A structured questionnaire was used to survey 230 surgeons (general, gynecologic, and urologic) and hospital administrators across the US and Europe regarding their current video recording practices. The same questionnaire was used to evaluate a blinded concept describing a new intraoperative recording solution. RESULTS: 54% of respondents reported recording eligible cases, with the majority recording less than 35% of their total eligible caseload. Reasons for not recording included finding no value in recording simple procedures, forgetting to record, lack of access to equipment, legal concerns, labor intensity, and difficulty accessing videos. Among non-recording surgeons, 65% reported considering recording cases to assess surgical techniques, document practice, submit to conferences, share with colleagues, and aid in training. 35% of surgeons rejected recording due to medico-legal concerns, lack of perceived benefit, concerns about secure storage, and price. Regarding the concept of a recording solution, 74% of all respondents were very likely or quite likely to recommend the product for adoption at their facility. Appealing features to current recorders included the product's ease of use, use of AI to maintain patient and staff privacy, lack of manual downloads, availability of full-length procedural videos, and ease of access and storage. Non-recorders found the immediate access to videos and maintenance of patient/staff privacy appealing. CONCLUSION: Tools that address barriers to recording, accessing, and managing surgical case videos are critical for improving surgical skills. Touch Surgery Enterprise is a valuable tool that can help overcome these barriers.

The evidence behind robot-assisted abdominopelvic surgery: a meta-analysis of randomized controlled trials.

BACKGROUND: Despite recent advancements, the advantage of robotic surgery over other traditional modalities still harbors academic inquiries. We seek to take a recently published high-profile narrative systematic review regarding robotic surgery and add meta-analytic tools to identify further benefits of robotic surgery. METHODS: Data from the published systematic review were extracted and meta-analysis were performed. A fixed-effect model was used when heterogeneity was not significant (Chi2 p ≥ 0.05, I2 ≤ 50%) and a random-effects model was used when heterogeneity was significant (Chi2 p < 0.05, I2 > 50%). Forest plots were generated using RevMan 5.3 software. RESULTS: Robotic surgery had comparable overall complications compared to laparoscopic surgery (p = 0.85), which was significantly lower compared to open surgery (odds ratio 0.68, p = 0.005). Compared to laparoscopic surgery, robotic surgery had fewer open conversions (risk difference - 0.0144, p = 0.03), shorter length of stay (mean difference - 0.23 days, p = 0.01), but longer operative time (mean difference 27.98 min, p < 0.00001). Compared to open surgery, robotic surgery had less estimated blood loss (mean difference - 286.8 mL, p = 0.0003) and shorter length of stay (mean difference - 1.69 days, p = 0.001) with longer operative time (mean difference 44.05 min, p = 0.03). For experienced robotic surgeons, there were less overall intraoperative complications (risk difference - 0.02, p = 0.02) and open conversions (risk difference - 0.03, p = 0.04), with equivalent operative duration (mean difference 23.32 min, p = 0.1) compared to more traditional modalities. CONCLUSION: Our study suggests that compared to laparoscopy, robotic surgery may improve hospital length of stay and open conversion rates, with added benefits in experienced robotic surgeons showing lower overall intraoperative complications and comparable operative times.

Preoperative comorbidities as a predictor of EBWL after bariatric surgery: a retrospective cohort study.

INTRODUCTION: The purpose of this study is to investigate the impact of preoperative comorbidities, including depression, anxiety, type 2 diabetes mellitus, obstructive sleep apnea, hypothyroidism, and the type of surgery on %EBWL (percent estimated body weight loss) in patients 1 year after bariatric surgery. Patients who choose to undergo bariatric surgery often have other comorbidities that can affect both the outcomes of their procedures and the postoperative period. We predict that patients who have depression, anxiety, diabetes mellitus, obstructive sleep apnea, or hypothyroidism will have a smaller change in %EBWL when compared to patients without any of these comorbidities. METHODS AND PROCEDURES: Data points were retrospectively collected from the charts of 440 patients from March 2012-December 2019 who underwent a sleeve gastrectomy or gastric bypass surgery. Data collected included patient demographics, select comorbidities, including diabetes mellitus, obstructive sleep apnea, hypothyroidism, depression, and anxiety, and body weight at baseline and 1 year postoperatively. Ideal body weight was calculated using the formula 50 + (2.3 × height in inches over 5 feet) for males and 45.5 + (2.3 × height in inches over 5 feet) for females. Excess body weight was then calculated by subtracting ideal body weight from actual weight at the above forementioned time points. Finally, %EBWL was calculated using the formula (change in weight over 1 year/excess weight) × 100. RESULTS: Patients who had a higher baseline BMI (p < 0.001), diabetes mellitus (p = 0.026), hypothyroidism (p = 0.046), and who had a laparoscopic sleeve gastrectomy rather than Roux-en-Y gastric bypass (p < 0.001) had a smaller %EBWL in the first year after bariatric surgery as compared to patients without these comorbidities at the time of surgery. Controversially, patients with anxiety or depression (p = 0.73) or obstructive sleep apnea (p = 0.075) did not have a statistically significant difference in %EBWL. CONCLUSION: A higher baseline BMI, diabetes mellitus, hypothyroidism, and undergoing laparoscopic sleeve gastrectomy may lead to lower %EBWL in the postoperative period after bariatric surgery. At the same time, patients' mental health status and sleep apnea status were not related to %EBWL. This study provides new insight into which comorbidities may need tighter control in order to optimize weight loss outcomes after bariatric surgery.

Endoscopic closure techniques of bariatric surgery complications: a meta-analysis.

BACKGROUND: Leaks following bariatric surgery, while rare, are potentially fatal due to risk of peritonitis and sepsis. Anastomotic leaks and gastro-gastric fistulae following Roux-En-Y gastric bypass (RYGB) as well as staple line leaks after sleeve gastrectomy have historically been treated multimodally with surgical drainage, aggressive antibiotic therapy, and more recently, endoscopically. Endoscopic clipping using over-the-scope clips and endoscopic suturing are two of the most common approaches used to achieve full thickness closure. METHODS: A systematic literature search was performed in PubMed to identify articles on the use of endoscopic clipping or suturing for the treatment of leaks and fistulae following bariatric surgery. Studies focusing on stents, and those that incorporated multiple closure techniques simultaneously, were excluded. Literature review and meta-analysis were performed with the PRISMA guidelines. RESULTS: Five studies with 61 patients that underwent over-the-scope clip (OTSC) closure were included. The pooled proportion of successful closure across the studies was 81.1% (95% CI 67.3 to 91.7). The successful closure rates were homogeneous (I2 = 39%, p = 0.15). Three studies with 92 patients that underwent endoscopic suturing were included. The weighted pooled proportion of successful closure across the studies was shown to be 22.4% (95% CI 14.6 to 31.3). The successful closure rates were homogeneous (I2 = 0%, p = 0.44). Three of the studies, totaling 34 patients, examining OTSC deployment reported data for reintervention rate. The weighted pooled proportion of reintervention across the studies was 35.0% (95% CI 11.7 to 64.7). We noticed statistically significant heterogeneity (I2 = 68%, p = 0.04). One study, with 20 patients examining endoscopic suturing, reported rate of repeat intervention 60%. CONCLUSION: Observational reports show that patients managed with OTSC were more likely to experience healing of their defect than those managed with endoscopic suturing. Larger controlled studies comparing different closure devices for bariatric leaks should be carried out to better understand the ideal endoscopic approach to these complications.

Evaluating the Spanish readability of American Society for Metabolic and Bariatric Surgery (ASMBS) Centers of Excellence (COE) websites.

BACKGROUND: Healthcare disparities continue to be an ongoing struggle in Bariatrics. Limited availability of Spanish online material may be a correctible barrier for accessibility to Hispanic patients. We sought to evaluate accredited Bariatric Centers of Excellence (COE) for Spanish readability via their websites to determine accessibility for Spanish speakers. METHODS: This was an internet research study. 103 COE accredited by American Society for Metabolic and Bariatric Surgery (ASMBS) and the American College of Surgeons (ACS) were evaluated and assigned one of five Spanish Visibility Categories. The United States was divided into 4 regions. Regional Spanish visibility was calculated by dividing each category count by the number of institutions in each region. County Spanish-speaking populations were obtained from the US Census Bureau's 2009-2013 American Community Survey. Differences in their distributions across the Spanish Visibility Categories were investigated using the Mann-Whitney U test. RESULTS: 25% of websites were translatable to Spanish, and a regional discrepancy was found with 61% translatable in the West, 19% in Northeast, 19% in Midwest, and 15% in South. Median Spanish-speaking population was higher in counties where websites were translatable to Spanish than where websites were not translatable. CONCLUSION: Healthcare disparities in Bariatrics continue to be an ongoing struggle. We suggest that Spanish readability for ASMBS ACS COE websites should be improved regardless of geographic differences in Spanish-speaking populations. We believe it would be valuable for these websites to have standards for readability of Spanish and other languages.

Robotic-assisted foregut surgery is associated with lower rates of complication and shorter post-operative length of stay.

BACKGROUND: Two of the most common foregut operations are laparoscopic Heller myotomy and laparoscopic Nissen fundoplication. Robotic assistance, compared to standard laparoscopic approach, may potentially grant surgeons advantages such as enhanced visualization and dexterity. This study compares patient outcomes for Heller myotomy (HM) and Nissen fundoplication (NF) when performed laparoscopically versus robotically. METHODS: A retrospective review of patients at a single institution who underwent laparoscopic or robotic-assisted HM or NF from January 2019 to July 2022 was conducted. 123 HM (72 laparoscopic, 51 robotic-assisted) and 92 NF (62 laparoscopic, 30 robotic-assisted) were performed by three surgeons. Outcomes investigated were operative time, hospital length of stay, pre- and post-operative imaging, resolution of symptoms at 30 days, resolution of symptoms at 90 days, and complications. RESULTS: In the HM cohorts, the average operative time was longer in the robotic cohort (127 min robotic versus 108 min laparoscopic, p < 0.01). However, overall complication rates (p < 0.05) were lower, and hospital length of stay was shorter in the robotic group (1.5 days compared to 2.7 days, p < 0.001). In the NF cohorts, there was no significant difference in operative time. However, hospital length of stay was shorter in the robotic group (1.54 days compared to 2.7 days, p < 0.001) with otherwise similar outcomes. There was no difference in the rate of post-operative resolution of symptoms or need for additional interventions in either HM or NF. CONCLUSION: Robotic-assisted HM and NF are associated with shorter hospital stays compared to their respective laparoscopic approaches. Robotic-assisted HM also has a lower rate of complications. Our findings suggest that robotic assistance may be beneficial for shortening hospital length of stay and decreasing complications for certain surgeries specific to Foregut surgery.

Mental health status as a predictor of emergency department visits and hospital readmissions post bariatric surgery: a retrospective cohort study.

BACKGROUND: This retrospective cohort study aims to investigate emergency department (ED) visits and readmission after bariatric surgery among patients with a history of anxiety and/or depression. We predict that patients with a reported history of anxiety and/or depression will have more ED visits in the year following surgery than patients without a history of mental illness. METHODS: Data were collected from the charts of all consecutive patients who underwent sleeve gastrectomy or gastric bypass surgery between March 2012 and December 2019. Data on baseline body mass index, mental health diagnosis and treatment and emergency department visits and hospital readmissions were retrospectively reviewed over the first year following surgery. RESULTS: One thousand two hundred ninety-seven patients were originally included in this study and 1113 patients were included in the final analysis. Patients with a history of depression (OR 1.23; 95% CI 0.87-1.73), anxiety (OR 1.14; 95% CI 0.81-1.60), or both (OR 1.17; 95% CI 0.83-1.65) did not have a statistically significant increase in ED visits compared to patients without these disorders. Patients with a history of depression (OR 1.49; 95% CI 0.86-2.61), anxiety (OR 1.45; 95% CI 0.80-2.65) or both (OR 1.47; 95% CI 0.94-2.29) did not have a statistically significant increase in hospital readmissions in the first year after surgery compared to patients without these disorders. Patients treated with a sleeve gastrectomy were readmitted due to postoperative complications less frequently than those treated with other surgeries (OR 0.20; 95% CI 0.05-0.83). CONCLUSION: Patients with a history of anxiety, depression or both did not have an increased rate of emergency department visits and hospital readmissions within the first year following bariatric surgery. This contradicts current literature and may be due to the multidisciplinary program patients undergo at this study's home institution.

Spanish-language bariatric surgery patient education materials fail to meet healthcare literacy standards of readability.

BACKGROUND: The Hispanic population is the fastest growing ethnic minority in the United States, contributing to nearly half of the population growth over the last decade. Unfortunately, this population suffers from lower-than-average health literacy rates, leading to poorer health outcomes. Per the American Medical Association and National Institutes of Health, patient education materials (PEMs) should be written at no higher than a 6th grade reading level. Given that US Hispanic adults have the second-highest obesity prevalence, this study aims to analyze the readability of Spanish-language PEMs regarding bariatric surgery available in US-based academic and medical centers. METHODS: A total of 50 PEMs were found via the query ""cirugía de pérdida de peso" site: (edu OR.org)" on the Google search engine. Thirty-nine sources met the inclusion criteria of belonging to a US-based academic or medical center and containing information regarding the indications for bariatric surgery, descriptions of the types of bariatric surgery, what to expect before and after surgery, or the risks and benefits of bariatric surgery. The excerpts were analyzed according to three readability formulas designed specifically for the Spanish language and evaluated for their reading grade level. RESULTS: All 39 sources were at the college reading level per the Fry graph corrected for Spanish. Per the Spaulding formula, 37 sources were "Grade 12 + " and two sources were "Grade 8-10." Per the Fernandez-Huerta formula, 16 sources were at the 8th/9th grade reading level, 22 sources were at the 7th grade reading level, and one was at the 6th grade reading level. CONCLUSION: The Spanish-language bariatric surgery PEMs available online from US-based academic and medical centers are generally above the recommended 6th grade reading level. Failure to meet the recommended sixth-grade reading level decreases health care literacy for Spanish-speaking patients within the United States seeking bariatric surgery.

Safety comparison of minimally invasive abdomen-only esophagectomy versus minimally invasive Ivor Lewis esophagectomy: a retrospective cohort study.

BACKGROUND: We report mortality and post-operative complications from esophageal resection in the treatment of gastroesophageal adenocarcinoma or stricture, comparing a minimally invasive abdomen-only esophagectomy (MIAE) approach with a minimally invasive Ivor Lewis esophagectomy (MIILE) approach. METHODS: A single-center retrospective cohort study of patients with esophageal adenocarcinoma or stricture treated by either MIAE or MIILE was conducted. MIAE was offered for strictures less than five centimeters or cancers that were American Joint Committee on Cancer (AJCC) Stage ≤ T2 without lymphadenopathy. Patients treated with these surgical techniques were analyzed to assess pre-operative risk, intra and post-operative variables, adverse events, and overall survival. RESULTS: This study included 17 patients undergoing MIAE and 32 patients treated with MIILE. There were a fewer median number of lymph nodes resected (p < 0.001) and shorter operative duration (p < 0.001) for MIAE compared to MIILE. MIAE patients also had significantly higher Charlson Comorbidity Index scores and ACS National Surgical Quality Improvement Program (NSQIP) surgical risk values than MIILE patients (p < 0.05). There was no difference in median estimated blood loss, length of stay, pulmonary or cardiac complications between groups. There was no significant difference in 90-day survival. CONCLUSION: A minimally invasive abdomen-only approach in a specific patient population is comparable in safety to a minimally invasive Ivor Lewis approach, with associated shorter median operative duration. MIAE patients had significantly greater pre-operative comorbidities and higher calculated peri-operative risk of complication but demonstrated similar post-operative outcomes. This suggests that MIAE may be a suitable surgical approach for treating gastroesophageal adenocarcinoma or stricture in patients deemed unsuitable for MIILE.

Association of individual surgeon volume and postoperative outcome in esophagomyotomy for achalasia.

BACKGROUND: Many surgical disciplines have demonstrated superior outcomes when procedures are performed at "high-volume". Esophagomyotomy is commonly performed for achalasia, however it's unclear what constitutes "high-volume" for this procedure, and if individual procedure volume and outcome are related. We identified physicians performing esophagomyotomy, stratified them by individual case volume, and examined their outcomes with the hypothesis that high-volume surgeons will be associated with improved outcomes as compared to low-volume surgeons. METHODS: The 2015-2019 Florida Agency for Health Care Administration (AHCA) inpatient dataset was queried for esophagomyotomy. Surgeons who performed ≥ 10 procedures during the study period were placed into the high-volume cohort, and those performing < 10 into the low-volume cohort. Groups were compared by length of stay, discharge disposition, and postoperative complications. Patient demographics were evaluated using student's t test and chi square test, p < 0.05 considered significant. RESULTS: Six hundred and sixty-two procedures performed by 135 surgeons were identified. The mean number of esophagomyotomies per surgeon was 4.9 (Range 1-147). The high-volume group (n = 12) performed 362 of the 662 procedures (55%), while the low-volume group (n = 123) performed the remaining 300 (45%). Patients of high-volume physicians had decreased length of stay (1.4 ± 0.8 days vs 4.9 ± 6.7 days, p = 0.01) and were more likely to be discharged to home following surgery (92.8% vs 86.0, p = 0.04). High volume physicians also had statistically significant differences in rates of urinary tract infection (1.4% vs 4.0%, p = 0.034), postoperative malnutrition (5.8% vs 11.0%, p = 0.015), and postoperative fluid and electrolyte disorders (5.5% vs 13.3%, p < 0.0001). CONCLUSION: Surgeons who perform higher volumes of esophagomyotomies are associated with decreased length of stay, higher likelihood of patient discharge to home, and decreased rates of some postoperative complications. This research should prompt further inquiry into defining what constitutes a high-volume center in foregut surgery and their role in improving patient outcomes.

A fully stapled technique for gastrojejunal anastomosis creation in robotic Roux-en-Y gastric bypass.

PURPOSE: The purpose of this paper is to showcase a fully stapled approach to creating a gastrojejunostomy during a robot-assisted Roux-en-Y gastric bypass. METHODS: We utilize two robotic 12-mm ports, two robotic 8-mm ports, and one 8-mm assistant port. The tools used are a fenestrated bipolar forceps, vessel sealer, cadiere grasper, needle driver, and a robotic stapler. After the partial gastrectomy, the roux limb is brought up to the gastric pouch where monopolar scissors are used to create a gastrotomy and enterotomy. The gastrotomy is made just above the staple line of the gastric pouch. The enterotomy is created 2 cm distal to the roux limb's staple line. The stapler is inserted into both the gastrotomy and enterotomy to create the common channel. A 2-0 vicryl suture is used to place four interrupted sutures across the remaining enterotomy in full thickness bites. An endoscope or Visigi bougie is advanced across the anastomosis into the roux limb before the final suture. The tails of the most lateral and medial sutures are grasped and lifted towards the abdominal wall. The stapler is advanced over the approximated enterostomy while holding tension with the suture tails. The stapler is fired transversely across the suture line to seal the gastrojejunostomy. The staple line may be oversewn with silk sutures. A leak test is performed prior to completing the reconstruction with the jejunojejunostomy. CONCLUSIONS: A fully stapled technique of anastomosis creation may reduce operative time, standardizes the process for reproducibility, and increases consistency across operators and patients.

A machine learning approach to high-risk cardiac surgery risk scoring.

INTRODUCTION: In patients undergoing high-risk cardiac surgery, the uncertainty of outcome may complicate the decision process to intervene. To augment decision-making, a machine learning approach was used to determine weighted personalized factors contributing to mortality. METHODS: American College of Surgeons National Surgical Quality Improvement Program was queried for cardiac surgery patients with predicted mortality ≥10% between 2012 and 2019. Multiple machine learning models were investigated, with significant predictors ultimately used in gradient boosting machine (GBM) modeling. GBM-trained data were then used for local interpretable model-agnostic explanations (LIME) modeling to provide individual patient-specific mortality prediction. RESULTS: A total of 194 patient deaths among 1291 high-risk cardiac surgeries were included. GBM performance was superior to other model approaches. The top five factors contributing to mortality in LIME modeling were preoperative dialysis, emergent cases, Hispanic ethnicity, steroid use, and ventilator dependence. LIME results individualized patient factors with model probability and explanation of fit. CONCLUSIONS: The application of machine learning techniques provides individualized predicted mortality and identifies contributing factors in high-risk cardiac surgery. Employment of this modeling to the Society of Thoracic Surgeons database may provide individualized risk factors contributing to mortality.

Factors Associated with Torsion in Pediatric Patients with Ovarian Masses.

BACKGROUND: Management of ovarian torsion has evolved toward ovarian preservation regardless of ovarian appearance during surgery. However, patients with torsion and an ovarian neoplasm undergo a disproportionately high rate of oophorectomy. Our objectives were to identify factors associated with ovarian torsion among females with an ovarian mass and to determine if torsion is associated with malignancy. METHODS: A retrospective review of females aged 2-21 y who underwent an operation for an ovarian cyst or neoplasm between 2010 and 2016 at 10 children's hospitals was performed. Multivariate logistic regression was used to assess factors associated with torsion. Imaging data were assessed for sensitivity, specificity, and predictive value in identifying ovarian torsion. RESULTS: Of 814 girls with an ovarian neoplasm, 180 (22%) had torsion. In risk-adjusted analyses, patients with a younger age, mass size >5 cm, abdominal pain, and vomiting had an increased likelihood of torsion (P < 0.01 for all). Patients with a mass >5 cm had two times the odds of torsion (odds ratio: 2.1; confidence interval: 1.2, 3.6). Imaging was not reliable at identifying torsion (sensitivity 34%, positive predictive value 49%) or excluding torsion (specificity 72%, negative predictive value 87%). The rates of malignancy were lower in those with an ovarian mass and torsion than those without torsion (10% versus 17%, P = 0.01). Among the 180 girls with torsion and a mass, 48% underwent oophorectomy of which 14% (n = 12) had a malignancy. CONCLUSIONS: In females with an ovarian neoplasm, torsion is not associated with an increased risk of malignancy and ovarian preservation should be considered.

Self-reported Outcomes After Cholecystectomy for Pediatric Hyperkinetic Biliary Dyskinesia.

BACKGROUND: Biliary dyskinesia (BD) is a common indication for cholecystectomy in children. Current literature demonstrates an improvement in symptoms after cholecystectomy in most pediatric patients with an EF <35%; however, data supporting the efficacy of cholecystectomy for hyperkinetic BD (EF >65%) is sparse. We sought to determine whether children with hyperkinetic BD (HBD) had resolution of their symptoms after laparoscopic cholecystectomy at our institution. MATERIALS AND METHODS: We conducted a retrospective chart review of children who had undergone laparoscopic cholecystectomy for HBD at our institution between September 2010 and July 2015. Patients completed a phone survey about symptom resolution, whether they were happy to have undergone cholecystectomy, overall satisfaction on a 1-10 scale, and additional workup for those with ongoing pain. Analysis was performed using STATA statistical software with a P-value < 0.05 as statistically significant. RESULTS: Thirteen patients met inclusion criteria. Median gallbladder ejection fraction was 93% [IQR: 90, 97]. Median postoperative follow-up was 59 d [IQR: 25, 151] at which time 50% reported resolution of symptoms. Eight patients participated in the survey at a median follow-up of 45 mo [IQR: 40, 66]. Fifty percent reported ongoing abdominal pain. Frequency of pain varied among patients with pain, occurring from <1 time per week to a few times per day. Five patients (63%), including one patient with ongoing pain, were happy that their gallbladder had been removed and overall satisfaction rating was 5 on a scale of 1-10. CONCLUSIONS: Only half of children with HBD were asymptomatic at long-term follow-up. Cholecystectomy for HBD may or may not improve symptoms.

Withholding Urinary Catheters in Children Receiving Patient-Controlled Analgesia for Appendicitis.

BACKGROUND: In some institutions, urinary catheters (UCs) have been placed in all patients receiving opioid patient-controlled analgesia (PCA) because of the increased incidence of urinary retention. Our institutional data demonstrated no UC replacements in 48 children who had PCA for perforated appendicitis who had their catheters removed before discontinuation of the PCA. As part of a quality improvement initiative, we discontinued the practice of requiring UC with PCA for perforated appendicitis. MATERIALS AND METHODS: A prospective list of patients with perforated appendicitis was maintained. Data were gathered regarding 60 consecutive patients. UC placement was allowed for specific indications including urinary retention and surgeon discretion. RESULTS: Sixteen patients (27%) received a UC with 14 of these being placed in the operating room (OR). Two UCs were placed outside the OR for urinary retention. Patients who underwent UC placement in the OR weighed significantly more than those who did not (33 versus 42 kg, P = 0.05). No patients required replacement of the catheter once removed. There were no postoperative urinary tract infections. Median PCA duration was 68 h (50, 98) for patients with UC placed in the OR compared with 60 h (47, 78) (P = 0.42). Median postoperative length of stay for patients with UC placed in the OR was 95 h (76, 140) compared with 90 h (70, 113) (P = 0.09). CONCLUSIONS: UC can be withheld from patients with perforated appendicitis who are placed on PCA with a very low placement rate. UC placement at time of operation did not lengthen time receiving PCA or length of stay.

Therapeutic Direction Versus Adverse Outcomes in Children Undergoing Lung Biopsy.

BACKGROUND: Lung biopsy is part of the diagnostic workup for multiple diseases. Although the morbidity of the procedure has decreased with the use of thoracoscopy, lung biopsy still holds substantial risk for patients. Therefore, we evaluated the likelihood of lung biopsies impacting treatment compared to complications. MATERIAL AND METHODS: This was a single-institution, retrospective chart review of patients less than aged 18 y undergoing lung biopsy from 2010 to 2016. Details of demographics, hospital course, adverse events, complications, pathology, and follow-up were recorded. All values are reported as medians with interquartile range. RESULTS: Thirty-seven patients met inclusion criteria. Median age was 7 y old (interquartile range 1.4, 15). Eighty-seven percent (33) of biopsies were performed thoracoscopically, with a 3% conversion rate. Adverse events occurred in 25% (9) of cases with the majority involving prolonged respiratory failure (n = 7). Complications occurred in 16% (6) of cases including pneumothorax (13%, n = 5) and cardiac arrest (3%, n = 1). A third of these complications (n = 2) required reoperation, and both were decompressions of tension pneumothoraces. Pathology established a diagnosis in 62% (n = 23) of cases, yet treatment was changed in only 43% of cases. No preoperative variables were associated with the pathology establishing a diagnosis or changing treatment. CONCLUSIONS: Lung biopsy for questionable pulmonary disease changed treatment in less than half of cases, with significant perioperative morbidity. Careful consideration should therefore be given to who would benefit most from lung biopsy.

Safety of Laparoscopic Gastrostomy in Children Receiving Peritoneal Dialysis.

BACKGROUND: The preferred method of dialysis for children is chronic peritoneal dialysis (CPD), and these children may require delayed gastrostomy tube (GT) placement. Investigators have reported a high risk of fungal peritonitis, early bacterial peritonitis, and catheter loss when percutaneous endoscopic gastrostomy is performed in children already undergoing CPD. Current International Society for Peritoneal Dialysis guidelines recommend only open GT for these patients. We sought to report the safety of laparoscopic gastrostomy (LG) among children already receiving PD. MATERIALS AND METHODS: We conducted a retrospective chart review of children who had initiated CPD before GT placement between 2010 and 2017 at our pediatric hospital. Demographic data, clinical details, and peritonitis rates were recorded. Peritonitis was defined as peritoneal WBC count >100/mm3 and >50% neutrophils, with or without a positive peritoneal culture. RESULTS: Twenty-three subjects had both undergone CPD and had a GT placed in the study period. Of these, 13 had a GT placed after CPD had been initiated. One of these was excluded for open technique and another excluded because of no overlap of GT and PD catheter, leaving 11 for analysis. Median age at the time of LG was 1.32 y and median weight-for-age z-score was -1.86 (IQR -2.9, -1.3). Median days to PD catheter and GT use after LG were 2 (range 0-4) and 1 (range 0-2). Median weight z-score change at 90 d was +0.5 (IQR -0.1, +0.9). All patients received antifungal and antibiotic coverage at time of GT placement. No subjects developed fungal peritonitis or early bacterial peritonitis, although one developed bacterial peritonitis within 30 d. The overall rate of peritonitis after laparoscopic gastrostomy tube was 0.35 episodes/patient-year. This was similar to a rate of 0.45 episodes/patient-year during PD but before laparoscopic gastrostomy tube in the same patients (P = 0.679). Four subjects required periods of hemodialysis, two of which were because of PD catheter removal due to infection. One of the latter was due to a relapse of pre-LG peritonitis and the patient later resumed PD. The other was due to remote post-LG peritonitis and the patient continued hemodialysis until renal transplant, both after 6 mo. CONCLUSIONS: We found that, in children already receiving PD, LG is similar in safety profile, efficacy, and technical principle to open gastrostomy. LG is therefore an appropriate and safe alternative to open gastrostomy in this setting.