A population based study of bariatric surgery in Illinois.

Background: Utilization of metabolic and bariatric surgery has increased significantly over the last 2decades, yet barriers to access remain.

Objectives: This study aimed to 1) define rates of metabolic and bariatric surgery utilization for qualifying adults in Illinois and 2) describe patient characteristics associated with undergoing surgery at Illinois hospitals with low metabolic and bariatric surgery volume.

Setting: Metabolic and bariatric surgery at all nonfederal Illinois hospitals was included.

Influence of referral type and sociodemographic factors on completion of bariatric surgery.

Background: The impact of referral type and socioeconomic status on completion of the bariatric surgery process is not well understood.

Objectives: This study aims to 1) describe how sociodemographic characteristics influence referral type and 2) identify predictors of completion of surgery.

Setting: Large multihospital health care system, including a large academic medical center.

Baseline weight recovery and mortality risk in head and neck cancer.

Background: As a surrogate of malnutrition, degree of weight loss and recovery from head and neck cancer (HNC) treatment is understudied. The influence of modifiable factors that affect weight, including speech/language pathology (SLP) and nutrition counseling, is also poorly defined. We characterize weight loss trends, baseline weight recovery (BWR), and the impact of interdisciplinary care on oncologic outcomes.

Surgeon variability in repair of hiatal hernia at the time of bariatric surgery.

Background: Hiatal hernia (HH) is estimated to affect between 20 and 50% of patients undergoing bariatric surgery. However, there is no consensus regarding the preoperative assessment and intraoperative repair of HH. The aim of this study was to evaluate the variation in surgeon assessment and repair of HH during bariatric surgery across a multi-hospital healthcare system.

Percutaneous Endoscopy and Image-guided Retrieval of Dropped Gallstones - A Case Series.

Background: Recurrent abscesses can happen due to dropped gallstones (DGs) after laparoscopic cholecystectomy (LC). Recognition and appropriate percutaneous endoscopy and image-guided treatment options can decrease morbidity associated with this condition.

Materials And Methods: We report a minimally invasive endoscopy and image-guided technique for retrieval of dropped gallstones in a series of 6 patients (M/F=3/3; median age: 75.

Secondary peristalsis and esophagogastric junction distensibility in symptomatic post-fundoplication patients.

Background: The impact of esophageal dysmotility among patients with post-fundoplication esophageal symptoms is not fully understood. This study aimed to investigate secondary peristalsis and esophagogastric junction (EGJ) opening biomechanics using functional lumen imaging probe (FLIP) panometry in symptomatic post-fundoplication patients.

Methods: Eighty-seven adult patients post-fundoplication who completed FLIP for symptomatic esophageal evaluation were included.

Increased bleeding risk with enoxaparin venothromboembolism prophylaxis compared with heparin in patients undergoing bariatric surgery.

Background: Perioperative venothromboembolism (VTE) chemoprophylaxis is an established tenant of bariatric surgery; however, there is little comparative data to guide medication choice. The objective of this study was to determine if a change in VTE prophylaxis from heparin to enoxaparin was associated with differing rates of postoperative bleeding and VTE occurrence after bariatric surgery.

Methods: This retrospective cohort study included patients 18 years or older who underwent primary bariatric surgery (sleeve gastrectomy (SG) or Roux-en-Y gastric bypass (RYGB)) at a single institution between March 2012 and December 2021.

Percutaneous Cystic Duct Interventions and Drain Internalization for Calculous Cholecystitis in Patients Ineligible for Surgery.

Purpose: To evaluate the feasibility, effectiveness, and outcomes of percutaneous cholecystostomy drain internalization in patients with calculous cholecystitis who were not surgical candidates.

Materials And Methods: Percutaneous cystic duct interventions were attempted in 17 patients (with the intent to place dual cholecystoduodenal stents) who were deemed unfit for surgery and had previously undergone percutaneous cholecystostomies for acute calculous cholecystitis. Baseline demographics, technical success, time from percutaneous cholecystostomy to internalization (dual cholecystoduodenal stent placement), stent patency duration, and adverse event rates were evaluated.

Preoperative Workup of Patients with Paraesophageal Hernias: Every Test for Every Patient?

Paraesophageal hernias (PEH) represent a small subset of all hiatal hernias. PEHs are often found incidentally during radiographic or endoscopic studies performed for another reason. While asymptomatic or minimally symptomatic PEHs can be safely observed with nonoperative management, the majority of patients with symptomatic PEHs will benefit from surgical repair, typically via a laparoscopic approach.

Identifying hiatal hernia with impedance planimetry during esophageal distension testing.

Introduction: Functional luminal imaging probe (FLIP) Panometry evaluates the esophageal response to distension involving biomechanics and motility. We have observed that hiatus hernia (HH) is evident during FLIP studies as a separation between the crural diaphragm (CD) and lower esophageal sphincter (LES) like what is seen with high-resolution manometry (HRM). The aim of this study was to compare FLIP findings to endoscopy and HRM in the detection of HH.

Novel advances in surgery for Gallstone Disease.

Purpose Of Review: Examine recent advances in the treatment of patients with complex gallstone disease.

Recent Findings: Laparoscopic common bile duct exploration (LCBDE) has been shown to be an effective and safe treatment for choledocholithiasis, resulting in decreased hospital length of stay and costs when compared with ERCP plus laparoscopic cholecystectomy (LC). Novel simulator-based curricula have recently been developed to address the educational gap that has resulted in an underutilization of LCBDE.

Addressing a systematic error correcting for free and mixed convection when measuring mean radiant temperature with globe thermometers.

It is widely accepted that most people spend the majority of their lives indoors. Most individuals do not realize that while indoors, roughly half of heat exchange affecting their thermal comfort is in the form of thermal infrared radiation. We show that while researchers have been aware of its thermal comfort significance over the past century, systemic error has crept into the most common evaluation techniques, preventing adequate characterization of the radiant environment.

Outcomes of 100 Patients More Than 4 Years After POEM for Achalasia.

Objective: We aim to describe the long-term follow-up data from our institution's POEM experience.

Summary Background Data: Per-oral endoscopic myotomy (POEM) is a well-established endoscopic therapy for achalasia with excellent short-term efficacy, but long-term outcomes data are limited.

Methods: Patients older than 4 years removed from POEM for treatment of achalasia were studied.

A fresh (air) look at ventilation for COVID-19: Estimating the global energy savings potential of coupling natural ventilation with novel radiant cooling strategies.

Radiant cooling-assisted natural ventilation is an innovative technical approach that combines new radiant cooling technology with natural ventilation to increase fresh air delivery into buildings year-round with minimal energy cost and improvment of air quality. Currently, the standard paradigm for HVAC (heating, ventilation and air conditioning) is based on central air systems that tie the delivery of heating and cooling to the delivery of fresh air. To prevent heat loss, the delivery of fresh air must be tightly controlled and is often limited through recirculation of already heated or cooled air.

Comparison of preoperative, intraoperative, and follow-up functional luminal imaging probe measurements in patients undergoing myotomy for achalasia.

Background And Aims: The functional luminal imaging probe (FLIP) is a novel catheter-based device that measures esophagogastric junction (EGJ) distensibility index (DI) in real time. Previous studies have demonstrated DI to be a predictor of post-treatment clinical outcomes in patients with achalasia. We sought to evaluate EGJ DI in patients with achalasia before, during, and after peroral endoscopic myotomy (POEM) and laparoscopic Heller myotomy (LHM) and to assess the correlation of DI with postoperative outcomes.

Constructing Learning Curves to Benchmark Operative Performance of General Surgery Residents Against a National Cohort of Peers.

Objective: No method or data exist to allow surgical trainees or their programs to contextualize their technical progress. The objective of this study was to create peer benchmarks for Cumulative Sum (CUSUM) charts based upon operative evaluations from a national cohort of general surgery residents.

Design, Setting, Participants: In 2016-2018, faculty from 26 general surgery residency programs nationwide rated 328 residents' operative performance on a case-by-case basis using a validated 5-point Likert scale.

Addressing the gap in laparoscopic common bile duct exploration training for rural surgeons: imparting procedural ability is not enough.

Background: Laparoscopic common bile duct exploration (LCBDE) is an underutilized therapy for choledocholithiasis. The driving factors of this practice gap are poorly defined. We sought to evaluate the attitudes and practice patterns of surgeons who underwent training courses using an LCBDE simulator.

Complications and Readmissions Associated with First Assistant Training Level Following Elective Bariatric Surgery.

Background: Little is known regarding the variation in training level and potential clinical impact of the first assistant in bariatric surgery. We describe the postoperative 30-day complications and readmissions following elective bariatric procedures by training level of the first assistant.

Methods: The ACS-MBSAQIP database was queried to identify patients who underwent elective sleeve gastrectomy, Roux-En-Y gastric bypass, duodenal switch, band placement, and revision from 2015 to 2016.

Membrane-assisted radiant cooling for expanding thermal comfort zones globally without air conditioning.

We present results of a radiant cooling system that made the hot and humid tropical climate of Singapore feel cool and comfortable. Thermal radiation exchange between occupants and surfaces in the built environment can augment thermal comfort. The lack of widespread commercial adoption of radiant-cooling technologies is due to two widely held views: 1) The low temperature required for radiant cooling in humid environments will form condensation; and 2) cold surfaces will still cool adjacent air via convection, limiting overall radiant-cooling effectiveness.

Intraoperative use of FLIP is associated with clinical success following POEM for achalasia.

Background: Esophagogastric junction distensibility index (DI), measured using the functional luminal imaging probe (FLIP), correlates with symptomatic outcomes after interventions for achalasia. The objective of this study was to determine if the intraoperative measurement of DI using FLIP was associated with improved clinical outcomes following per-oral endoscopic myotomy (POEM) for achalasia when compared with procedures in which FLIP was not utilized.

Methods: Patients undergoing POEM from 2012 to 2017 at a single institution by a single surgeon were studied.

Achalasia subtypes can be identified with functional luminal imaging probe (FLIP) panometry using a supervised machine learning process.

Background: Achalasia subtypes on high-resolution manometry (HRM) prognosticate treatment response and help direct management plan. We aimed to utilize parameters of distension-induced contractility and pressurization on functional luminal imaging probe (FLIP) panometry and machine learning to predict HRM achalasia subtypes.

Methods: One hundred eighty adult patients with treatment-naïve achalasia defined by HRM per Chicago Classification (40 type I, 99 type II, 41 type III achalasia) who underwent FLIP panometry were included: 140 patients were used as the training cohort and 40 patients as the test cohort.

Intraoperative FLIP distensibility during POEM varies according to achalasia subtype.

Background: The functional luminal imaging probe (FLIP) can be used to measure the esophagogastric junction distensibility index (DI) during myotomy for achalasia and increased DI has been shown to predict superior clinical outcomes. The objective of this study was to determine if the intraoperative DI and the changes produced by per oral endoscopic myotomy (POEM) differed between achalasia subtypes.

Methods: FLIP measurements were performed during POEM for achalasia at a single institution.

Concordance Between Expert and Nonexpert Ratings of Condensed Video-Based Trainee Operative Performance Assessment.

Objective: We examined the impact of video editing and rater expertise in surgical resident evaluation on operative performance ratings of surgical trainees.

Design: Randomized independent review of intraoperative video.

Setting: Operative video was captured at a single, tertiary hospital in Boston, MA.

Globe thermometer free convection error potentials.

For thermal comfort research, globe thermometers have become the de facto tool for mean radiant temperature, t, measurement. They provide a quick means to survey the radiant environment in a space with nearly a century of trials to reassure researchers. However, as more complexity is introduced to built environments, we must reassess the accuracy of globe measurements.