Temporary Mechanical Circulatory Support During Bariatric Surgery: A Novel Bridge to Durable Left Ventricular Assist Device and Cardiac Transplantation

Advanced heart failure (HF) with comorbid severe obesity presents a unique surgical dilemma: bariatric surgery may help patients meet cardiac transplantation body mass index (BMI) criteria, but poor cardiac function puts them at increased intraoperative risk. Per International Society for Heart and Lung Transplantation (ISHLT) guidelines BMI > 35 is a contraindication for orthotopic heart transplantation. Temporary mechanical circulatory support (MCS) with Impella 5.5 during bariatric surgery, as presented in this report, may help solve this dilemma for some patients. We present three patients with severe obesity and advanced heart failure (HF) who underwent successful bariatric surgery while supported by Impella 5.5 (Abiomed, Inc., Danvers, MA).

How I do it: robotic hiatal hernia repair with stapled conversion from Nissen to Toupet fundoplication

The purpose of this paper is to describe a robotic surgical technique for converting a slipped Nissen fundoplication to a Toupet fundoplication. Our technique utilizes four 8 mm robotic ports placed in a horizontal pattern above the umbilicus. The robotic tools we used are a vessel sealer, bipolar forceps, and Cadière forceps. In addition, an esophagogastroduodenoscopy (EGD) is placed through the esophagus into the stomach to be used as a bougie. If a hernia is present, we dissect it from the mediastinum until the posterior confluence is identified. Next sutures from the previous Nissen fundoplication are identified and removed to mobilize the crus. All adhesions around the stomach are removed to mobilize the esophagus, ensuing 3 cm of intraabdominal esophagus is available. Using an EGD as a bougie, we used two interrupted, 0 silk suture over Teflon pledgets placed in a horizontal mattress fashion to close the hiatal defect. Using an endoscope, we identified the previous Nissen fundoplication and used a 60 mm blue load stapler to transect the wrap from the stomach. The 360° Nissen fundoplication had now been converted into a 270° Toupet fundoplication, which is confirmed with the EGD. The functionality of the wrap is confirmed if the "Stack of Coins" sign is present, and the wrap lies tight against the scope. A Nissen-to-Toupet fundoplication conversion using a robotic-assisted surgical technique may be useful in reducing reoperations and complications in patients undergoing fundoplication surgery.

The Financial Implications of a Single-Use Device Reprocessing Program at a Tertiary Referral Center Surgical Department

The operating room has been identified as one of the primary contributors to waste and energy expenditure in the health care system. The primary objective of our study was to evaluate the efficacy of single-use device reprocessing and report the cost savings, waste diversion, and reduction in carbon emissions. Data was collected from January 2021 to April 2023. Medline collected the data for analysis and converted it from an Excel file format to SPSS (Version 27) for analysis. Descriptive frequencies were used for data analysis. We found a mean monthly cost savings of $16,051.68 and a mean 700.68 pounds of waste a month diverted, resulting in an estimated yearly saving of $2354.29 in disposal costs and a reduction of 1112.65 CO2e emissions per month. This program has made significant contributions to cost savings and environmental efforts.

Ventral hernia repair using bioresorbable poly-4-hydroxybutyrate mesh in clean and contaminated surgical fields: a systematic review and meta-analysis

PURPOSE

Use of biologic or synthetic mesh in hernia repair shifts is based on evolving evidence. Poly-4-hydroxybutyrate (P4HB) biosynthetic mesh is a potential alternative to biologic and synthetic mesh in ventral hernia repair (VHR). This meta-analysis assesses the efficacy of P4HB mesh in clean and contaminated surgical settings.

METHODS

Two authors searched literature on PubMed, reviewing titles and abstracts of all articles to determine inclusion eligibility. Post-operative data were compared via transformation method to convert the proportion of patients with the outcome of interest into a suitable quantity for random-effects synthesis using STATA software.

RESULTS

Initial search yielded 287 citations. Six studies were included and categorized on whether hernia repairs were conducted in clean (CDC class I) or contaminated cases (CDC class II-IV). The pooled proportion of surgical site infection (SSI), surgical site occurrence (SSO), hernia recurrence, total surgical complications, and reoperation were calculated in 391 clean and 81 contaminated cases. For clean vs. contaminated cases, the following pooled proportions were noted: SSI (2% (CI 0-7%) vs 9% (CI 0-025) (p = 0.03), SSO: 14% (CI 5-25%) vs 35% (CI 22-50%) (p = 0.006), hernia recurrence (8% (CI 1-19%) vs 4% (CI 0-12%) (p = 0.769); surgical complications (17% (CI 6-32%) vs 50% (CI 27-72%) (p = 0.009). Reoperation data were available in 298 clean cases across four studies: 5% (CI 0-15%).

CONCLUSIONS

P4HB biosynthetic mesh may be more effective than previously thought, particularly in clean wounds. P4HB may also be superior to biologic mesh when compared to clinical trial data. Further research is necessary for more direct comparison.

Adjuvant and Neo-Adjuvant Anti-Obesity Medications and Bariatric Surgery: A Scoping Review

PURPOSE OF REVIEW

To comprehensively summarize the current body of literature on the topic of adjuvant and neoadjuvant pharmacotherapy used in combination with bariatric surgery.

RECENT FINDINGS

Anti-obesity medications (AOMs) have been used since the mid-1900s; however, their use in combination with bariatric surgery is a newer area of research that is rapidly growing. Pharmacotherapy may be used before (neoadjuvant) or after (adjuvant) bariatric surgery. Recent literature suggests that adjuvant AOMs may address weight regain and inadequate weight loss following bariatric surgery. Research on neoadjuvant AOM used to optimize weight loss before bariatric surgery is more limited. A literature review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Thirty-four studies were included after screening and exclusion of irrelevant records. Included studies were as follows: seven prospective studies on adjuvant AOM use, 23 retrospective studies on adjuvant AOM use, one prospective study on adjuvant and neoadjuvant AOM use, one retrospective study on adjuvant or neoadjuvant AOM use, one prospective study on neoadjuvant AOM use, and one case series on neoadjuvant AOM use. In the following scoping review, each of these studies is discussed with the goal of presenting a complete synthesis of the current body of literature on AOM use in combination with bariatric surgery.

Robotics vs Laparoscopy in Foregut Surgery: Systematic Review and Meta-Analysis Analyzing Hiatal Hernia Repair and Heller Myotomy

BACKGROUND

Laparoscopic surgery remains the mainstay of treating foregut pathologies. Several studies have shown improved outcomes with the robotic approach. A systematic review and meta-analysis comparing outcomes of robotic and laparoscopic hiatal hernia repairs (HHR) and Heller myotomy (HM) repairs is needed.

STUDY DESIGN

PubMed, Embase and Scopus databases were searched for studies published between January 2010 and November 2022. The risk of bias was assessed using the Cochrane ROBINS-I tool. Assessed outcomes included intra- and post-operative outcomes. We pooled the dichotomous data using the Mantel-Haenszel random effects model to report odds ratio (OR) and 95% confidence intervals (95% CIs) and continuous data to report mean difference (MD) and 95% CIs.

RESULTS

Twenty-two comparative studies enrolling 196,339 patients were included. Thirteen (13,426 robotic, 168,335 laparoscopic patients) studies assessed HHR outcomes, while nine (2,384 robotic, 12,225 laparoscopic patients) assessed HM outcomes. Robotic HHR had a non-significantly shorter length of hospital stay (LOS) [MD -0.41 (95% CI -0.87, -0.05)], fewer conversions to open [OR 0.22 (95% CI 0.03, 1.49)], and lower morbidity rates [OR 0.76 (95% CI 0.47, 1.23)]. Robotic HM led to significantly fewer esophageal perforations [OR 0.36 (95% CI 0.15, 0.83)], reinterventions [OR 0.18 (95% CI 0.07, 0.47)] a non-significantly shorter LOS [MD -0.31 (95% CI -0.62, 0.00)]. Both robotic HM and HHR had significantly longer operative times.

CONCLUSIONS

Laparoscopic and robotic HHR and HM repairs have similar safety profiles and perioperative outcomes. Randomized controlled trials are warranted to compare the two methods, given the low to moderate quality of included studies.

Evaluating the use of adjuvant and neoadjuvant terminology in bariatric surgery: a scoping review

BACKGROUND

Weight regain and inadequate weight loss are common after bariatric surgery. Literature is emerging regarding the use of pharmacotherapy with bariatric surgery as a potential solution to these adverse effects. Pharmacotherapy may be used before (neoadjuvant) or after (adjuvant) bariatric surgery, although this terminology has not been standardized. As a rapidly growing area of research, there is opportunity to standardize terminology for future ease of research, data synthesis, and communication. This review aimed to comprehensively evaluate the use of the terms "adjuvant" and "neoadjuvant" to describe pharmacotherapy used in combination with bariatric surgery and propose standardized terminology for future research.

METHODS

Literature search was conducted systematically and in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Studies were included if they were published after 1999; were randomized controlled trials, prospective/retrospective cohort studies, or case series; and used human subjects that were adults at least 18 years of age. The use of the terms "neoadjuvant" and "adjuvant" was analyzed over time.

RESULTS

Thirty-four publications were included. Thirty-two (94.1%) studied the use of adjuvant pharmacotherapy after bariatric surgery. Four (11.8%) studied the use of pharmacotherapy before bariatric surgery, and 1 used the term "neoadjuvant" to describe medications used before bariatric surgery. Eight publications used the term "adjuvant" to describe medications used after bariatric surgery.

CONCLUSION

Standardized terminology is needed to ease future understanding, evidence synthesis, and dissemination of work. We propose that the terms "neoadjuvant" and "adjuvant" become the standard terminology to describe pharmacotherapy use before and after bariatric surgery, respectively.

Examining surgeon stress in robotic and laparoscopic surgery

Robotic surgery may decrease surgeon stress compared to laparoscopic. To evaluate intraoperative surgeon stress, we measured salivary alpha-amylase and cortisol. We hypothesized robotic elicited lower increases in surgeon salivary amylase and cortisol than laparoscopic. Surgical faculty (n = 7) performing laparoscopic and robotic operations participated. Demographics: age, years in practice, time using laparoscopic vs robotic, comfort level and enthusiasm for each. Operative data included operative time, WRVU (surgical "effort"), resident year. Saliva was collected using passive drool collection system at beginning, middle and end of each case; amylase and cortisol measured using ELISA. Standard values were created using 7-minute exercise (HIIT), collecting saliva pre- and post-workout. Linear regression and Student's t test used for statistical analysis; p values < 0.05 were significant. Ninety-four cases (56 robotic, 38 laparoscopic) were collected (April-October 2022). Standardized change in amylase was 8.4 ± 4.5 (p < 0.001). Among operations, raw maximum amylase change in laparoscopic and robotic was 23.4 ± 11.5 and 22.2 ± 13.4; raw maximum cortisol change was 44.21 ± 46.57 and 53.21 ± 50.36, respectively. Values normalized to individual surgeon HIIT response, WRVU, and operative time, showing 40% decrease in amylase in robotic: 0.095 ± 0.12, vs laparoscopic: 0.164 ± 0.16 (p < 0.02). Normalized change in cortisol was: laparoscopic 0.30 ± 0.44, robotic 0.22 ± 0.4 (p = NS). On linear regression (p < 0.001), surgeons comfortable with complex laparoscopic cases had lower change in normalized amylase (p < 0.01); comfort with complex robotic was not significant. Robotic may be less physiologically stressful, eliciting less increase in salivary amylase than laparoscopic. Comfort with complex laparoscopic decreased stress in robotic, suggesting laparoscopic experience is valuable prior to robotic.

Hernia repair in the bariatric patient: a systematic review and meta-analysis

BACKGROUND

Repair options for ventral hernias in bariatric patients include performing a staged approach in which bariatric surgery is performed before definitive hernia repair (BS-first), a staged approach in which hernia repair is performed before bariatric surgery (HR-first), or a concomitant approach.

OBJECTIVES

This meta-analysis aims to determine which surgical approach is best for bariatric patients with hernias.

SETTING

PubMed, CENTRAL, and Embase databases.

METHODS

A comprehensive search was performed according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines to screen for all studies that focused on outcomes of patients who underwent both hernia repair and bariatric surgery, either simultaneously or separately. Exclusion criteria included hiatal and inguinal hernia studies, case reports, and case series.

RESULTS

27 studies fit our inclusion criteria after identifying 1584 studies initially. Seven comparative studies were included, enrolling 8548 staged patients (6458 BS-first) and 3528 concomitant patients. A total of 7 single-arm staged studies and 13 single-arm concomitant studies were also included. Data on hernia recurrence, mesh infection, reoperation, surgical site infections, seroma, bowel complications, and mortality were abstracted. The concomitant approach was associated with decreased odds of experiencing surgical site infections, reoperation, and seromas. The staged approach (BS-first) was associated with decreased odds of mesh infection. The single-arm studies suggest a lower incidence of hernia recurrence in a staged BS-first approach than in a concomitant approach.

CONCLUSIONS

The data suggest a concomitant approach is appropriate for hernias that the surgeon feels do not require mesh, while the staged (BS-first) approach is more appropriate if the hernia requires mesh placement.

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.

Effects of Spinal Deformities on Hiatal Hernia Occurrence and Recurrence

BACKGROUND

Spinal deformities such as kyphosis, lordosis, and scoliosis have demonstrated a possible association between these deformities. Our hypothesis is that the presence of spinal deformities will increase the risk of hiatal hernia recurrence after repair.

METHODS

The following data was retrospectively gleaned for patients undergoing hiatal hernia repair (1997-2022): age, sex, date of hiatal hernia repair, presence and type of spinal deformity, Cobb angle, type of hiatal hernia and size, type of hiatal hernia repair, recurrence and size, time to recurrence, reoperation, type of reoperation, and time to reoperation.

RESULTS

Spinal deformities were present in 15.8% of 546 patients undergoing hiatal hernia repair, with a distribution of 21.8% kyphosis, 2.3% lordosis, 58.6% scoliosis, and 17.2% multiple. There was no difference in sex or age between groups. Spinal deformity patients were more likely to have types III and IV hiatal hernias (52.3% vs. 38.9%, p = 0.02) and larger hernias (median 5 [3-8] vs. 4 [2-6], p = 0.01). There was no difference in access, fundoplication use, or mesh use between groups. However, these patients had a higher recurrence rate (47.7% vs 30.0%, p = 0.001) and a shorter time to recurrence (months) (10.3 [5.6-25.1] vs 19.2 [9.8-51.0], p = 0.02). Cobb angle did not affect recurrence.

CONCLUSIONS

Spinal deformity patients were more likely to have more complex and larger hiatal hernias. They were at higher risk of hiatal hernia recurrence after repair with shorter times to recurrence. This is a group that requires special attention with additional preoperative counseling and possibly use of surgical adjuncts in repair.

Peroral Endoscopic Myotomy; Novice Surgeon Learning Curve

INTRODUCTION

Peroral endoscopic myotomy (POEM) is a novel endoscopic procedure used to treat achalasia and other spastic esophageal disorders that is an alternative to Heller myotomy. We seek to define the learning curve of POEM for a foregut surgeon with no formal endoscopic or POEM training by analyzing different intraoperative factors in a single series.

METHODS AND PROCEDURES

The first 38 consecutive patients undergoing POEM by a single foregut surgeon were included in this retrospective study. Inverse curve regression models were used to analyze total operative time (TOT) and total operative time per centimeter of myotomy (TOT-CM), in addition to other intraoperative variables. Clinical outcomes were reported as pre- and post-operative Eckardt Scores.

RESULTS

All patients had type II achalasia with no post-operative complications observed. Eckardt scores improved postoperatively (median (range): 1 (0-4)) compared with the preoperative scores (10 (8-12)) (P < .001). The total operative time (median 76 minutes, range 51-129) decreased significantly over the course of the series (R2 = .38, P < .001), with a learning plateau at 70 minutes and a learning rate of 12 cases. Total operative time per centimeter of myotomy (median 7.08 min/cm, range 4.25 to 15.38) decreased over time (R2 = .45, P < .001), with a learning plateau at 7 minutes/cm and a learning rate of 12 cases.

CONCLUSION

The number of cases for a foregut surgeon to become proficient in a POEM procedure was found to be 12-14 cases. The learning curve for a POEM in a formally trained foregut surgeon may be comparable to an endoscopically trained interventionist.

Efficacy of bariatric intervention as a bridge to cardiac transplant

BACKGROUND

Many patients with heart failure (HF) are denied cardiac transplants due to inability to meet transplantation body mass index (BMI) criteria. Bariatric intervention, including surgery, medication, and weight loss guidance, may help patients lose weight and become eligible for transplantation.

OBJECTIVE

We aim to contribute to the literature on the safety and efficacy of bariatric intervention on patients with obesity and HF who are awaiting cardiac transplantation.

SETTING

University hospital, United States.

METHODS

This was a mixed retrospective/prospective study. Eighteen patients with HF and BMI >35 kg/m2 were reviewed. Patients were divided based on whether they underwent bariatric surgery or nonsurgical intervention and whether they had left ventricular assist devices or other advanced heart failure therapy including inotropic support, guideline-directed medical therapy, and/or temporary mechanical circulatory support. Weight, BMI, and left ventricular ejection fraction (LVEF) were collected before bariatric intervention and 6 months after bariatric intervention.

RESULTS

No patients were lost to follow-up. Bariatric surgery led to statistically significant decreases in weight and BMI when compared with nonsurgical patients. At 6 months after intervention, surgical patients lost an average of 18.6 kg and decreased their BMI by 6.4 kg/m2 while nonsurgical patients lost 1.9 kg and decreased their BMI by .7 kg/m2. After bariatric intervention, surgical patients had an average LVEF increase of 5.9% and nonsurgical patients had an average decrease of 5.9%, although these findings lacked statistical significance.

CONCLUSION

Our study suggests that bariatric intervention among patients with HF and obesity is a safe and effective method of weight and BMI reduction.

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.

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.

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.

Massive Paraesophageal Hernia Repair in the Obese Patient Population: Antireflux Gastric Bypass Versus Fundoplication

Introduction: Obesity is a risk factor for gastroesophageal reflux disease (GERD) and hiatal hernia (HH). Fundoplication is the standard operation for GERD with HH. Roux-en-Y gastric bypass (RYGB) is the procedure of choice for obese patients with either GERD or a large HH, but neither are indications for RYGB. To delineate bypass surgery as a treatment option for obese patients with HH and GERD, we propose new terminology, antireflux gastric bypass (ARGB). ARGB differs from RYGB by utilizing varying efferent limb lengths for GERD treatment. We hypothesized that ARGB would have higher GERD resolution, lower HH recurrence, and improves weight loss when compared with fundoplication. Methods: A retrospective cohort study was performed, evaluating patients undergoing repair of large HH (>5 cm) with obesity from January 2013 to February 2021. The primary outcome was GERD resolution, secondary outcomes include HH recurrence and weight loss. Multivariate logistic regression adjusted for age, body mass index (BMI), and hernia size by nonlinear mixed modeling. Results: Forty patients underwent fundoplication, and 16 patients underwent ARGB. Fundoplication patients had a larger mean hernia size (8.7 × 6.3 cm versus 6.6 × 6.4 cm), whereas ARGB patients had a higher BMI (39.2 versus 34.2 kg/m²). Recurrence showed nonstatistically significant lower incidence with ARGB and no significant difference in GERD resolution. Weight (P < .0001) and excess body weight (P < .0001) loss were superior with ARGB. Conclusions: Obese patients with large HHs and GERD treated with ARGB had similar GERD resolution, lower HH recurrence, and improved weight loss when compared with fundoplication. ARGB is an acceptable treatment option for obese patients with a massive paraesophageal hernia in the setting of GERD.

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.

Indications and efficacy of conversion from tacrolimus- to sirolimus-based immunosuppression in pediatric patients who underwent liver transplantation for unresectable hepatoblastoma

SRL-based immunosuppressive strategies in pediatric liver transplantation are not clearly defined, especially within the first year after liver transplant. TAC is the more common, traditional immunosuppressant used. However, SRL may modulate TAC-associated kidney injury and may also have antiproliferative properties that are valuable in the management of patients following liver transplantation for HB. We sought to determine whether early conversion from TAC to SRL was safe, effective, and beneficial in a subset of liver transplant recipients with unresectable HB exposed to CDDP-based chemotherapy. Between 2008 and 2013, six patients were transplanted for unresectable HB. All patients received at least one cycle of CDDP-based chemotherapy prior to transplant. All patients were switched from TAC- to SRL-based immunosuppression within 1 year of transplant. Five patients had improvement in their mGFR, while one patient had a slight decline. The improvement in mGFR was statistically significant. No adverse events were identified. Three patients had BPAR that responded to pulsed steroids. Historical controls showed similar rates of BPAR within the first year after transplant. There were no identified HB recurrences in the follow-up time period. Conversion from TAC to SRL appears to be safe and effective in this selected group of pediatric liver transplant recipients without adverse reaction or HB recurrences.

Do health beliefs affect pain perception after pectus excavatum repair?

PURPOSE

The pain experience is highly variable among patients. Psychological mindsets, in which individuals view a particular characteristic as either fixed or changeable, have been demonstrated to influence people's actions and perceptions in a variety of settings including school, sports, and interpersonal. The purpose of this study was to determine if health mindsets influence the pain scores and immediate outcomes of post-operative surgical patients.

METHODS

As part of a multi-institutional, prospective, randomized clinical trial involving patients undergoing a minimally invasive pectus excavatum repair of pectus excavatum, patients were surveyed to determine whether they had a fixed or growth health mindset. Their post-operative pain was followed prospectively and scored on a Visual Analog Scale and outcomes were measured according to time to oral pain medication use.

RESULTS

Fifty patients completed the Health Beliefs survey, 17 had a fixed mindset (8 epidural, 9 PCA) and 33 had a growth mindset (17 epidural, 16 PCA). Patients with a growth mindset had lower post-operative pain scores than patients with a fixed mindset although pain medication use was not different.

CONCLUSION

This is the first usage of health mindsets as a means to characterize the perception of pain in the post-operative period. Mindset appears to make a difference in how patients perceive and report their pain. Interventions to improve a patient's mindset could be effective in the future to improve pain control and patient satisfaction.

The Laparoscopic Versus Open Approach for Reduction of Intussusception in Infants and Children: An Updated Institutional Experience

PURPOSE

We have previously demonstrated successful laparoscopic management after failed enema reduction of children with intussusception. The purpose of this study is to assess the effectiveness of our mature experience with laparoscopic reduction by evaluating operative success, duration of hospital stay, postoperative complications, and hospital readmission rates.

MATERIALS AND METHODS

After IRB approval, a retrospective review was conducted on children (age 0-18 years) who failed enema reduction of intussusception between 2008 and 2017. Cases were classified as either open or laparoscopic. Demographic data, incidence of bowel resection, postoperative length of stay, complications, and hospital readmission rates were abstracted from patient medical records. Comparative analysis was performed in STATA with a P value <.05 determined as significant.

RESULTS

A total of 81 children were included in our study with 63 patients (78%) undergoing a laparoscopic reduction and 18 patients (22%) undergoing an open operation. Laparoscopic reduction carried similar complication rates (11%) when compared with children undergoing an open reduction (11%, P = 1.00). Furthermore, both hospital readmission rates and returns to the operating room were similar between the two groups (P = .345 and P = .672, respectively). The median postoperative length of stay was shorter for patients undergoing a laparoscopic reduction (4 days, interquartile range [IQR], 2-5 days) than for patients undergoing an open reduction (5 days, IQR, 4-6 days, P = .001). Children undergoing a laparoscopic reduction had a decreased rate of bowel resection (43% versus 50%, P = .591) despite similar rate of pathological lead points (21% versus 22%, P = .884).

CONCLUSION

Laparoscopic management of intussusception after failed radiographic reduction yields a reduced hospital length of stay with no increase in hospital readmission rates and reoperations.

Outcomes Using Cryoablation for Postoperative Pain Control in Children Following Minimally Invasive Pectus Excavatum Repair

PURPOSE

Pain is the main factor that determines the postoperative course for patients undergoing pectus bar placement. Cryoablation of the intercostal nerves has been suggested to mitigate this pain. We instituted a protocol for using intercostal cryoablation and report our early results compared to our immediately previous cohort.

MATERIALS AND METHODS

A retrospective study was conducted on patients undergoing minimally invasive repair for pectus excavatum between January 1, 2017, and August 21, 2017. Demographic data, anthropometrics, operative times, type and duration of patient analgesia, and postoperative length of stay were collected. Descriptive statistics were performed with all means reported ± standard deviations. Comparisons between groups were analyzed on STATA using T-tests with a P value <.05 determined as significant.

RESULTS

Twenty-eight patients were treated for pectus excavatum during the study period with 9 (32%) undergoing cryoablation. Mean number of rib spaces ablated was 5 ± 0.53 with no reported intraoperative complications. Mean operative time was 30 minutes longer in the cryoablation group (P = .00). Days to only oral pain medication was shorter in the cryoablation group, (1.22 ± 0.66 day versus 2.63 ± 0.68 day, P = .00). Length of stay, in days, was shorter in the cryoablation group (1.4 ± 0.72 days versus 4.0 ± 1.0 days, P = .00). There were no reported complications from cryoablation or bar placement during the study period. Days to discontinuation of oral narcotics were less in the cryoablation group (8.2 ± 7.0 versus 18.2 ± 10.4, P = .00).

CONCLUSION

Cryoablation after pectus bar placement dramatically decreases narcotic usage and postoperative length of stay.

The impact of thromboelastography on resuscitation in pediatric liver transplantation

Although TEG directs effective resuscitation in adult surgical patients, pediatric data are lacking. We performed a retrospective comparative review of the effect of TEG on blood product utilization and outcomes following pediatric liver transplantation in 38 patients between 2008 and 2014. Diagnoses, laboratory values, fluid and blood product use, and outcomes were examined. Nineteen patients underwent liver transplantation prior to the implementation of TEG, and 19 had perioperative TEG. The most common indications for transplant were BA (n = 14), HB (n = 7), and metabolic disorders (n = 7). Intraoperative blood loss, urine output, fluid and blood product use were similar between groups. However, the use of fresh frozen plasma decreased significantly in TEG patients within the first 24 hours (29 vs 0 mL/kg, P < .01), and between 24 and 48 hours (12 vs 0 mL/kg, P = .01) post-operatively. The total use of fresh frozen plasma during hospitalization was markedly reduced (111 vs 17 mL/kg, P < .01). Four patients in the TEG group had thromboembolic graft complications, including portal vein or hepatic artery thrombosis, and underwent retransplantation. The decreased use of fresh frozen plasma since implementation of TEG is an important finding for resource utilization and patient safety. However, the increased incidence of thromboembolic complications requires further investigation.

Sacral Neuromodulation for Bladder Atony – A Case Report

In most cases, sacral neuromodulation is used as a treatment for urge incontinence and symptoms of urgency and frequency. It is most used in those who are refractory to traditional management. It is much less common to be used for bladder atony. In this report, we present a case of a 24-year-old woman with a history of urinary retention and bladder atony who failed medical management and subsequently had an InterStim sacral neuromodulator implanted. After implantation, she was able to discontinue intermittent catheterization and had a decrease in her postvoid residual from 848 to 72 mL.