Why do not we talk about MIS fellowship? A short review of the short literature.

BACKGROUND: The minimally invasive surgery (MIS) fellowship has existed for three decades and has steadily grown in both number of positions available and variety of techniques practiced. Despite continued popularity, growth, and wide breadth of surgical techniques of the MIS fellowship, publication rates in medical journals regarding these fellowships have not been as robust as one may expect. Our goal was to review the available literature on MIS fellowship. METHODS: We reviewed PubMed to search for articles pertinent for MIS fellowship. The initial search included "MIS fellowship" "minimally invasive surgery fellowship" and "laparoscopy fellowship." Articles pertaining to MIS fellowship were then reviewed by title and abstract for content. Articles were excluded from subsequent analysis if they focused on disciplines that were not direct extensions of general surgery (such as urology, gynecology, oncology). Using similar search techniques, we tabulated unfiltered publications rates specific to other major surgical fellowship disciplines. The metric articles per position was created by dividing the total number articles for each discipline by the annual fellowship positions RESULTS: An initial review of available literature produced 134 articles pertinent to MIS fellowship. Further analysis for direct relevance to MIS yielded only 58 published articles. MIS had the fewest number of publications and smallest APP, 0.7, of any of the major fellowship disciplines. CONCLUSIONS: There is a surprising dearth of material on MIS fellowship. While, MIS fellowship is a one-year experience, we have the opportunity to build on three decades of clinical experience to continue optimize the fellow experience and improve subspecialized surgical training and patient outcomes. This could be facilitated through broadened focus of inquiry and publication of findings.

What is MIS fellowship? Community and academic program experience.

INTRODUCTION: Minimally invasive surgery (MIS) fellowship is one of the most popular fellowship programs, but little is known about the individual fellow's clinical experience. Our goal was to determine the differences in case volume and case type in academic and community programs. METHODS: A retrospective review of advanced gastrointestinal, MIS, foregut, or bariatric fellowship cases logged into the Fellowship Council directory of fellowships during the 2020 and 2021 academic years included for analysis. The final cohort included 57,324 cases from all fellowship programs, that list data on the Fellowship Council website, including 58 academic programs and 62 community-based programs. All comparisons between groups were completed using Student's t-test. RESULTS: The mean number of cases logged during a fellowship year was 477.7 ± 149.9 with similar case numbers in academic and community programs, 462.5 ± 115.0 and 491.9 ± 176.2 respectively (p = 0.28). The mean data is illustrated in Fig. 1. The most common performed cases were in the following categories: bariatric surgery (149.8 ± 86.9 cases), endoscopy (111.1 ± 86.4 cases), hernia (68.0 ± 57.7 cases) and foregut (62.8 ± 37.3 cases). In these case-type categories, no significant differences in case volume were found between academic and community-based MIS fellowship programs. However, community-based programs had significantly more case experience compared to academic programs in all of the less commonly performed case-type categories: appendix 7.8 ± 12.8 vs 4.6 ± 5.1 cases (p = 0.08), colon 16.1 ± 20.7 vs 6.8 ± 11.7 cases (p = 0.003), hepato-pancreatic-biliary 46.9 ± 50.8 vs 32.5 ± 18.5 cases (p = 0.04), peritoneum 11.7 ± 16.0 vs 7.0 ± 7.6 cases (p = 0.04), and small bowel 11.9 ± 9.6 vs 8.8 ± 5.9 cases (p = 0.03). CONCLUSION: MIS fellowship has been a well-established fellowship program under the Fellowship Council guideline. In our study, we aimed to identify the categories of fellowship training and the perspective case volumes in academic vs community setting. We conclude that fellowship training experience is similar in case volumes of commonly performed cases when comparing academic and community programs. However, there is substantial variability in the operative experience among MIS fellowship programs. Further study is necessary to identify the quality of fellowship training experience.

Monitoring performance in laparoscopic gastric bypass surgery using risk-adjusted cumulative sum at 2 high-volume centers.

BACKGROUND: Traditional surgical outcomes are measured retrospectively and intermittently, limiting opportunities for early intervention. OBJECTIVES: The objective of this study was to use risk-adjusted cumulative sum (RA-CUSUM) to track perioperative surgical outcomes for laparoscopic gastric bypass. We hypothesized that RA-CUSUM could identify performance variations between surgeons. SETTING: Two mid-Atlantic quaternary care academic centers. METHODS: Patient-level data from the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) were abstracted for laparoscopic gastric bypasses performed by 3 surgeons at 2 high-volume centers from 2014 to 2021. Estimated probabilities of serious complications, reoperation, and readmission were derived from the MBSAQIP risk calculator. RA-CUSUM curves were generated to signal observed-to-expected odds ratios (ORs) of 1.5 (poor performance) and .5 (superior performance). Control limits were set based on a false positive rate of 5% (α = .05). RESULTS: We included 1192 patients: Surgeon A = 767, Surgeon B = 188, and Surgeon C = 237. Overall rates of serious complications, 30-day reoperations, and 30-day readmissions were 3.9%, 2.5%, and 5.2% respectively, with expected rates of 4.7%, 2.2%, and 5.8%. RA-CUSUM signaled lower-than-expected (OR < .5) rates of readmission and serious complication in Surgeon A, and higher-than-expected (OR > 1.5) readmission rate in Surgeon C. Surgeon A further demonstrated an early period of higher-than-expected (OR > 1.5) reoperation rate before April 2015, followed by superior performance thereafter (OR < .5). Surgeon B's performance generally reflected expected standards throughout the study period. CONCLUSIONS: RA-CUSUM adjusts for clinical risk factors and identifies performance outliers in real-time. This approach to analyzing surgical outcomes is applicable to quality improvement, root-cause analysis, and surgeon incentivization.

What's Nissen on the net? the quality of information regarding Nissen fundoplication on the internet.

BACKGROUND: More patients are turning to the internet for their health information than ever before. This is a growing problem as it is well recognized that medical information on the internet is highly variable. We assessed the quality of information on the internet regarding the anti-reflux procedure, Nissen Fundoplication. Three commonly used measures of website quality are the Health On the Net code, the Journal of the American Medical Association Benchmark criteria, and the DISCERN tool. The HON code is a seal of approval awarded by an independent organization where the JAMA Benchmark and DISCERN Tool are a set of standards that can be utilized by an internet user or webpage creator. METHODS: We performed a Google search using the term "Nissen Fundoplication", where we analyzed the top 75 websites. We included English language websites and excluded advertisements, websites for medical professionals, duplicates, and requiring a login. Each website included was evaluated for presence of the HON seal and scored with the JAMA Benchmark and DISCERN criteria to determine quality. RESULTS: Only 16.28% of websites were found to be HON code certified. The average JAMA benchmark score was 1.23, with 9.3% websites scoring the maximum 4 points and 39.53% receiving a score of 0. The average DISCERN score was 34.65 out of a total possible score of 75, where the mean score for the overall quality of the website (question 16) was 2.19 out of a maximal score of 5. CONCLUSION: This study, using 3 commonly used validated measures, has found that the quality of online information pertaining to Nissen Fundoplication is sorely lacking. The implications of these results are twofold as an important reference for institutions to update their source material and a guide when providing patients with adequate resources.

Insurance Coverage of Pediatric Bariatric Surgery: a Cross-Sectional Analysis of the USA.

PURPOSE: Pediatric bariatric surgery is increasingly recognized as a safe and effective option for the management of obesity and obesity-related conditions. However, insurance coverage is a key barrier to accessing these procedures. Criteria are variable and often not evidence-based. In an effort to characterize common patterns in insurance coverage, we report coverage criteria for adolescents relative to adults. MATERIALS AND METHODS: We surveyed medical policies of the 50 highest market share health insurance providers in the USA. Private insurer coverage criteria included age, Tanner staging, skeletal maturity, body mass index, procedures covered, medical weight management requirements, co-morbidities, and multidisciplinary team criteria. These were then compared to the American Society for Metabolic and Bariatric Surgery (ASMBS) guidelines. RESULTS: Two thirds (n = 33, 66%) of companies provided inclusion criteria for adolescents. All policies covered RYGB (n = 33), most covered sleeve gastrectomy (n = 32, 97.0%). Obstructive sleep apnea (OSA) (n = 32, 97%), hypertension (HTN) (n = 27, 81.8%), and gastroesophageal reflux disease (GERD) (n = 11, 33.3%) were the three most commonly cited co-morbidities used as inclusion criteria. Tanner staging or skeletal maturity were most commonly used (n = 10, 30.3%). Similarly, twenty (60.6%) insurers required medical weight management programs. Multi-disciplinary teams were required by 81.8% of adolescent policies (n = 27) as described by the ASMBS. Seventeen (51.5%) policies defined providers for these teams, and 10 (30.3%) provided other defined criteria. CONCLUSION: Contrary to ASMBS guidelines, companies commonly require Tanner staging and/or skeletal maturity criteria as well as participation in medical weight management programs. Also, multi-disciplinary team are frequently required but not well defined.

Ten Year Trends in Minimally Invasive Surgery Fellowship.

BACKGROUND: Minimally Invasive Surgery (MIS) is one of the more recently established surgical fellowships, with many candidates applying due to a perception of inadequate exposure to advanced MIS during residency. The desire for advanced training should be reflected in increased competitiveness for fellowship positions. The aim of this study is to determine the desirability of MIS fellowships over time through review of national application data. METHODS: We reviewed the fellowship match statistics obtained from The Fellowship Council, the organizing body behind the MIS fellowship match. Data from January 1, 2008 - December 31, 2019 were included. We compared match rates to other specialties using the National Resident Matching Program, a nonprofit organization established for US residency and some fellowship programs. RESULTS: In the period of 2008 to 2019, the number of certified MIS fellowship programs increased from 124 to 141. While this program expansion was associated with a 19% increase in available positions, the number of applications increased 36%. As a result, the number of positions filled increased from 83% to 97%, but the match rate among US applicants fell from 82% to 71% during this interval. In comparison, the match rates for pediatric surgery, surgical oncology, vascular surgery, and surgical critical care fellowships remained largely unchanged, most recently 50%, 56%, 99%, and 100% respectively. CONCLUSION: Over the last decade, US residents have shown an increased interest in pursuing MIS fellowship positions. As a consequence, the match process for MIS fellowships is becoming increasingly competitive.

Panniculectomy at the time of bariatric surgery: a propensity score-matched analysis of outcomes in the MBSAQIP database.

BACKGROUND: Body contouring in the postbariatric surgery patient improves quality of life and daily function. OBJECTIVES: To determine the risk profile of panniculectomy when performed in select patients at the time of bariatric surgery. SETTING: Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) participating centers. METHODS: We examined the MBSAQIP database (2016-2017), in which data on 379,544 bariatric surgeries are reported. Concurrent panniculectomy procedures were identified by Current Procedural Technology (CPT) codes. Patient characteristics and in-hospital as well as 30-day complications were compared between the body contouring group and propensity score-matched bariatric surgery controls. RESULTS: One hundred twenty-four patients met inclusion criteria and were matched to 248 controls. An infra-umbilical panniculectomy was performed in the majority of patients (n = 94, 75.8%). Most patients received an open rather than laparoscopic bariatric surgery (n = 87, 70.2%). There were no statistically significant differences between 30-day mortality (1.9%), wound complications (11.5%), readmission (12.5%) and reoperation (5.8%) between the 2 groups (P > .05). Wound complications occurred in 11.5% of patients and were associated with prolonged hospital stay (odds ratio 4.65, 95% confidence interval 1.99-10.86, P < .001) and a body mass index (BMI) > 50 (odds ratio 3.19, 95% confidence interval 1.02-9.96, P = .046). CONCLUSION: In select patients, panniculectomy at the time of bariatric surgery was not associated with increased in-hospital or 30-day adverse outcomes compared with matched bariatric surgery controls. This procedure may be performed in select patients, with awareness that revision surgery may be needed once weight loss stabilizes.

Marijuana use does not affect the outcomes of bariatric surgery.

BACKGROUND: The decriminalization of marijuana and legalization of derived products requires investigation of their effect on healthcare-related outcomes. Unfortunately, little data are available on the impact of marijuana use on surgical outcomes. We aimed to determine the effect of marijuana use on 30-day complications and 1-year weight loss following laparoscopic Roux-en-Y gastric bypass (LRYGB) and laparoscopic sleeve gastrectomy (LSG). METHODS: At a large academic center, 1176 consecutive patients undergoing primary bariatric surgery from 2012 to 2017 were identified and separated into cohorts according to marijuana use. The only exclusions were 19 patients lost to follow-up. Propensity score matching, using logistic regression according to preoperative age, gender, BMI, and comorbid conditions, yielded 73 patient pairs for the control and study arms. All patients were followed two years postoperatively. RESULTS: Excess BMI lost did not differ between marijuana users and controls at 3 weeks (23.0% vs 18.9%, p = 0.095), 3 months (42.0% vs 38.1%, p = 0.416), 6 months (60.6% vs 63.1%, p = 0.631), 1 year (78.2% vs 77.3%, p = 0.789), or 2 years (89.1% vs 74.5%, p = 0.604). No differences in the rate of major 30-day postoperative complications, including readmission, infection, thromboembolic events, bleeding events and reoperation rates, were found between groups. Follow-up rate at two years was lower in marijuana users (12.3% vs 27.4%, p = 0.023). CONCLUSION: This study suggests marijuana use has no impact on 30-day complications or weight loss following bariatric surgery, and should not be a contraindication to bariatric surgery.

Operative approach to intestinal malrotation encountered during laparoscopic gastric bypass.

Congenital anomalies of midgut rotation are uncommon with a 0.2-0.5% incidence. Intestinal malrotation (IM) presents a unique challenge in bariatric surgery during laparoscopic gastric bypass (LRYGB), and familiarity with alternatives allows for safe laparoscopic intervention. IM was encountered in 5 of 1183 (0.4%) patients undergoing surgery. Once IM was suspected, a standardized approach was applied: rightward shift of ports, confirmation of IM by the absence of the ligament of Treitz, identification of the duodenojejunal junction, lysis of Ladd's bands, mirror-image construction of the Roux limb and construction of the gastrojejunal anastomosis. Forty percent were male, age 33 ± 8 years, with body mass index 50 kg/m2 (37-75 kg/m2). IM was identified preoperatively in two patients (40%). All operations were completed laparoscopically. Despite the finding of IM, successful laparoscopic completion of gastric bypass can be anticipated if the surgeon has an understanding of the anatomic alterations and a strategy for intraoperative management.

Postoperative small bowel obstruction secondary to single malformed staple following laparoscopic total abdominal colectomy.

Surgical staplers are ubiquitous in gastrointestinal surgery, especially laparoscopy. Intraperitoneal staples are designed to be inert and are generally regarded as benign; however, complications from primarily malformed staples can rarely occur. Here, we present a case of early mechanical postoperative small bowel obstruction due to a surgical staple following laparoscopic total abdominal colectomy and end ileostomy creation performed for medically refractory ulcerative colitis. Management consisted of diagnostic laparoscopy and careful extraction of a malformed surgical staple tethering a loop of small bowel to the rectal stump. Eight similar cases following gastrointestinal surgery have been identified in the literature, all occurring in the first 2 weeks following laparoscopic appendectomy. To our knowledge, this is the first case described following laparoscopic total abdominal colectomy, with high-grade small bowel obstruction at the level of the rectal stump staple line.

Preoperative Opioid Prescription Patients Do Not Suffer Distinct Outcomes After Bariatric Surgery: a Matched Analysis of Outcomes.

PURPOSE: While over 200 million opioid prescriptions are written annually for chronic pain in the USA, little has been written on the impact of opioids on bariatric surgery, specifically on the effects of prescription opioid use on weight loss post laparoscopic Roux-en-Y gastric bypass (LRYGB) and laparoscopic sleeve gastrectomy (LSG). MATERIALS AND METHODS: We completed a matched-cohort, retrospective review in 1176 consecutive patients undergoing primary bariatric surgery at a single institution. Patients were grouped into chronic prescription opioid users (POU), defined as ongoing opioid use for > 3 months at the time of surgery, and opioid-naïve controls (CON), defined as no opioid use prior to surgery. About 130 POU and 130 CON patients were then matched according to preoperative comorbid conditions and demographics. RESULTS: Percent total weight loss was similar at 3 weeks, 3 months, 6 months, 1 year, and 2 years in POU and CON-9.6 ± 5.8 vs 8.9 ± 4.5 (p = 0.057), 18.4 ± 7.2 vs 18.5 ± 7.2% (p = 0.901), 28.0 ± 9.4 vs 27.9 ± 12.9% (p = 0.894), 30.3 ± 13.0 vs 32.8 ± 9.0% (p = 0.387), and 31.4 ± 12.7 vs 36.9 ± 21.3% (p = 0.369), respectively. The 30-day readmission, reoperation, venothrombotic event rate, bleeding rate, and infection rate were similar in POU compared to CON patients. CONCLUSIONS: Complications and weight loss outcomes are similar for prescription opioid users compared to opioid-naïve controls following bariatric surgery. Chronic prescription opioid use is not a contraindication to bariatric surgery.

Review of Insurance Coverage for Abdominal Contouring Procedures in the Postbariatric Population.

BACKGROUND: Following bariatric surgery, patients develop problems related to lax abdominal skin that may be addressed by contouring procedures. Third-party insurers have subjective requirements for coverage of these procedures that can limit patient access. The authors sought to determine how well third-party payers cover abdominal contouring procedures in this population. METHODS: The authors conducted a cross-sectional analysis of insurance policies for coverage of panniculectomy, lower back excision, and circumferential lipectomy. Abdominoplasty was evaluated as an alternative to panniculectomy. Insurance companies were selected based on their market share and state enrolment. A list of medical necessity criteria was abstracted from the policies that offered coverage. RESULTS: Of the 55 companies evaluated, 98 percent had a policy that covered panniculectomy versus 36 percent who would cover lower back excision (p < 0.0001), and one-third provided coverage for circumferential lipectomy. Of the insurers who covered panniculectomy, only 30 percent would also cover abdominoplasty. Documentation of secondary skin conditions was the most prevalent criterion in panniculectomy policies (100 percent), whereas impaired function and secondary skin conditions were most common for coverage of lower back excision (73 percent and 73 percent, respectively). Frequency of criteria for panniculectomy versus lower back excision differed most notably for (1) secondary skin conditions (100 percent versus 73 percent; p = 0.0030), (2) weight loss (45 percent versus 7 percent; p = 0.0106), and (3) duration of weight stability (82 percent versus 53 percent; p = 0.0415). CONCLUSIONS: For the postbariatric population, panniculectomy was covered more often and had more standardized criteria than lower back excision or circumferential lipectomy. However, all have vast intracompany and interpolicy variations in coverage criteria that may reduce access to procedures, even among patients with established indications.

A Cross-sectional Analysis of Insurance Coverage of Extremity Contouring After Massive Weight Loss.

INTRODUCTION: After bariatric surgery, patients often experience redundant skin in the upper arms and medial thighs as sequelae of massive weight loss. Insurance companies have unpredictable criteria to determine the medical necessity of brachioplasty and thighplasty, which are often ascribed as cosmetic procedures. We evaluated current insurance coverage and characterized policy criteria for extremity contouring in the postbariatric population. METHODS: We conducted a cross-sectional analysis of insurance policies for coverage of brachioplasty and thighplasty in January 2019. Insurance companies were selected based on their state enrolment data and market share. A web-based search and direct calls were conducted to identify policies. A comprehensive list of standard criteria was compiled based on the policies that offered coverage. RESULTS: Of the 56 insurance companies assessed, half did not provide coverage for either procedure (n = 28). No single criterion featured universally across brachioplasty and thighplasty policies. Functional impairment was the most commonly cited condition for preapproval of brachioplasty and/or thighplasty (94%). Conversely, minimum weight loss was the least frequent criterion within the insurance policies (6%). Only 5% of the insurance companies (n = 3) would consider coverage of liposuction-assisted lipectomy as a modality for brachioplasty or thighplasty. CONCLUSIONS: We propose a comprehensive list of reporting recommendations to help optimize authorization of extremity contouring in the postbariatric population. There is great intercompany variation in preapproval criteria for brachioplasty and thighplasty, illustrating an absence of established recommendations or guidelines. High-level evidence and investigations are needed to ascertain validity of the limited coverage criteria in current use.

Insurance Coverage Criteria for Bariatric Surgery: A Survey of Policies.

BACKGROUND: Bariatric surgery remains underutilized at a national scale, and insurance company reimbursement is an important determinant of access to these procedures. We examined the current state of coverage criteria for bariatric surgery set by private insurance companies. METHODS: We surveyed medical policies of the 64 highest market share health insurance providers in the USA. ASMBS guidelines and the CMS criteria for pre-bariatric evaluation were used to collect private insurer coverage criteria, which included procedures covered, age, BMI, co-morbidities, medical weight management program (MWM), psychosocial evaluation, and a center of excellence designation. We derive a comprehensive checklist for pre-bariatric patient evaluation. RESULTS: Sixty-one companies (95%) had defined pre-authorization policies. All policies covered the RYGB, and 57 (93%) covered the LAGB or the SG. Procedures had coverage limited to center of excellence in 43% of policies (n = 26). A total of 92% required a BMI of 40 or above or of 35 or above with a co-morbidity; however, 43% (n = 23) of policies covering adolescents (n = 36) had a higher BMI requirement of 40 or above with a co-morbidity. Additional evaluation was required in the majority of policies (MWM 87%, psychosocial evaluation 75%). Revision procedures were covered in 79% (n = 48) of policies. Reimbursement of a second bariatric procedure for failure of weight loss was less frequently found (n = 41, 67%). CONCLUSIONS: A majority of private insurers still require a supervised medical weight management program prior to approval, and most will not cover adolescent bariatric surgery unless certain criteria, which are not supported by current evidence, are met.

A Review of National Insurance Coverage of Post-bariatric Upper Body Lift.

INTRODUCTION: Recent years have seen an increased utilisation of upper body lift following massive weight loss. Although it is typically considered cosmetic, the recurrent skin conditions and decline in quality of life may warrant medical necessity. We evaluated current insurance coverage and characterised policy criteria for upper body lift in the post-bariatric population. METHODS: We defined upper body lift as a combination of mastopexy and upper back excision (UBE) and conducted a cross-sectional analysis of US insurance policies. Insurance companies were selected based on their enrolment data and market share. A web-based search and telephone interviews were conducted to identify the policy. Criteria were abstracted from the publicly available policies that offered coverage. RESULTS: Of the 56 insurance companies assessed, 5% would consider coverage of both procedures. Although fewer companies held established policies for UBE than mastopexy in the post-bariatric population (79% vs 96%, p = 0.0081), there were significantly more policies that offered pre-approval for UBE than for mastopexy (30% vs 5%, p = 0.0017). Three medical necessity criteria were common to both procedures: evidence of functional impairment, secondary skin conditions, and medical photographs. CONCLUSION: Policy criteria for coverage of mastopexy or UBE differ greatly between companies. Further evaluation of medical necessity criteria for post-bariatric mastopexy and UBE with the establishment of a standardised guideline is needed. We propose a comprehensive list of reporting recommendations to help optimise authorisation of upper body lift in the post-bariatric population, and we urge plastic surgeons to challenge current definition of "cosmetic" by insurance companies. LEVEL OF EVIDENCE V: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Laparoscopic Sleeve Gastrectomy has a Lower Risk of Postoperative Bleeding Than Laparoscopic Roux-en-Y Gastric Bypass.

Measures to reduce postoperative bleeding (POB) after bariatric surgery is skewed toward laparoscopic sleeve gastrectomy (LSG). We use 2015 Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) to characterize the differences in bleeding rates between LSG and laparoscopic Roux-en-Y gastric bypasses (LRYGB). Propensity score matching and multivariable logistic regressions tested for independent differences in POB rates. A total of 168,093 patients from 742 centers were identified in the data set. After selection 36,925 patients with LRYGB and 20,020 patients with LSG were included in the analysis. A total of 710 (1.25%) patient suffered a POB. The independent odds of POB were 38% lower for patients having LSG compared with those having LRYGB (odds ratio, 0.62; 95% confidence interval=0.51-0.76). This difference is more pronounced with intraoperative securing of the staple line. Appropriate measures to reduce POB after each type of bariatric procedure is warranted.

Postoperative bleeding after laparoscopic Roux en Y gastric bypass: predictors and consequences.

BACKGROUND: Laparoscopic Roux-en-Y gastric bypass (LRYGB) is a common, safe and effective bariatric procedure. Bleeding is a significant source of postoperative morbidity. We aimed to determine the incidence, outcomes, and predictors of postoperative bleeding after LRYGB. METHODS: LRYGB patients included in the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) 2015 dataset were identified. Preoperative and intraoperative factors were tested for associations with bleeding using univariable and multivariable logistic regression analysis. Outcomes of length of stay, in-hospital mortality, 30-day mortality, discharge disposition, and 30-day complications among patients with and without clinically significant postoperative bleeding were compared using multivariable regression. RESULTS: In the 43,280 LRYGB patients included in this analysis, postoperative bleeding occurred in 652 (1.51%) patients. Of these, 165 (25.3%) underwent a re-operation and 97 (14.9%) underwent an unplanned endoscopy for 'bleeding'. Postoperative bleeding was associated with a longer median postoperative length of stay (4 vs. 2 days), higher in-hospital mortality (1.23 vs. 0.04%), higher 30-day mortality (1.38 vs. 0.15%), discharge to an extended-care facility (3.88 vs. 0.6%), and higher rates of major complications (all P < 0.05). Independent predictors of postoperative bleeding included; a history of renal insufficiency (OR 2.55, 95% CI 1.43-4.52), preoperative therapeutic anticoagulation (OR 2.44, 95% CI 1.69-3.53), and revisional surgery (OR 1.45, 95% CI 1.06-1.97). Intraoperative associated factors included conversions (OR 3.37, 95% CI 1.42-7.97), and drain placement (OR 1.40, 95% CI 1.18-1.67). Robotic approaches resulted in independently lower postoperative bleeding rates (OR 0.50, 95% CI 0.32-0.77). CONCLUSIONS: Postoperative bleeding occurs in 1.5% of patients undergoing a LRYGB and is associated with significantly increased morbidity and mortality. We have identified patient and operative factors that are independently associated with postoperative bleeding.

Staple Line Treatment and Bleeding After Laparoscopic Sleeve Gastrectomy.

BACKGROUND AND OBJECTIVES: Staple line treatment during laparoscopic sleeve gastrectomy (LSG) remains a controversial issue among bariatric surgeons. The objective of this study was to compare rates of postoperative bleeding (POB) among various methods of staple line reinforcement. METHODS: The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program 2015 dataset was queried for patients undergoing an LSG. Patients were stratified by staple line treatment groups-no treatment (NT), suture oversewing (OVERSEW), buttressing by a commercial product (BUTTRESS), and both buttress and oversew (COMBINATION). The primary outcome was POB. Multivariable logistic regression was used to compare POB rates among the treatment groups. RESULTS: In the 98,142 LSG patients meeting selection criteria, 623 (0.63%) patients had POB and 181 (0.18%) required reoperation. POB occurred in 0.80% for the NT group, 0.68% for the OVERSEW group, 0.57% for the BUTTRESS group, and 0.55% for the COMBINATION group. On multivariable analyses, all treatment groups were less likely to have POB compared with the NT group-OVERSEW (odds ratio [OR] 0.73, 95% confidence interval [CI] 0.54-0.98), BUTTRESS (OR 0.70, 95% CI 0.57-0.84), and COMBINATION (OR 0.66, 95% CI 0.50-0.89) (all P < .01). Subset analysis revealed no difference between BUTTRESS and OVERSEW (OR 0.95, 95% CI 0.71-1.26, P = .71). CONCLUSIONS: Relative to an NT staple line, the use of OVERSEW or BUTTRESS can decrease the rates of POB by up to 30%. The use of these techniques should be strongly considered by the bariatric surgeon.

Exponential decay modeling can define parameters of weight loss trajectory after laparoscopic Roux-en-Y gastric bypass.

BACKGROUND: Laparoscopic Roux-en-Y gastric bypass (LRYGB) produces durable and clinically significant weight loss. We aim to characterize the trajectory of weight loss, and demonstrate the predictive ability of three-month performance on final weight loss. METHODS: Retrospective analysis of 1097 consecutive LRYGB patients allowed for assessment of conformity of various weight loss trajectory models. Establishing exponential decay as the optimal fit, initial, three-month and final BMI values were used to determine empiric rate constants (λ3). Empirically derived weight loss curves and associated rate constants (λ) were generated. RESULTS: Exponential decay optimally characterizes post-LRYGB weight loss trajectory. Final weight loss can be characterized by λ3, as well as by the demographics black race (P = 0.008) and initial BMI (P < 0.001). Stratification by three-month weight loss allowed derivation of weight loss trajectory curves to predict weight at any point until and including plateau. CONCLUSIONS: Weight loss after LRYGB conforms well to exponential decay, and postoperative trajectory can thus be predicted early. This allows the clinician early identification and intervention upon patients at risk of poor performance.