A self-selecting prophecy: prevalence of burnout in surgical fellows.

BACKGROUND: Burnout has become a prominent topic, yet there are limited data on the manifestation of this phenomenon among surgical fellows. The goal of this study is to elucidate the prevalence of burnout and determine if there are protective or predisposing factors in surgical fellowship training. METHODS: A confidential electronic survey was distributed to Fellowship Council accredited fellows during the 2020-2021 academic year. Demographic information and training characteristics were queried. The fellows were then asked to complete the Maslach Burnout Inventory (MBI), Perceived Stress Scale (PSS), Short Grit Scale (SGS), Satisfaction with Life Scale (SLS), and General Self-Efficacy Scale (SE). Data were analyzed using p values of ≤ 0.05 as statistically significant. RESULTS: At the end of the survey period, 92 out of 196 (46.9%) fellowship trainees responded. 69.6% of respondents identified as men, 29.7% as international medical school graduates (IMGs), and 15.3% non-US IMGs. Based on criteria defined by the MBI, there was an 8.4% rate of burnout. Most respondents noted low stress levels (62.3%), good satisfaction with life (58.9%), a moderate amount of grit, and a high level of self-esteem. On comparative analysis, fellows with burnout had significantly higher stress levels, lower levels of satisfaction with life, and less self-esteem. CONCLUSIONS: Overall, there was a low rate of burnout among fellows. We suggest this may be reflective of a self-selecting effect, as trainees who choose to undergo additional training may be less likely to experience this syndrome. In addition, there may be a protective factor during fellowship that results from inherent mentoring, increased specialization, and autonomy. Further investigation of the predisposing factors to burnout in fellowship trainees is warranted based on the results of this study.

Structure-Guided Insight into the Specificity and Mechanism of a Parasitic Nucleoside Hydrolase.

Trichomonas vaginalis is the causative parasitic protozoan of the disease trichomoniasis, the most prevalent, nonviral sexually transmitted disease in the world. T. vaginalis is a parasite that scavenges nucleosides from the host organism via catalysis by nucleoside hydrolase (NH) enzymes to yield purine and pyrimidine bases. One of the four NH enzymes identified within the genome of T. vaginalis displays unique specificity toward purine nucleosides, adenosine and guanosine, but not inosine, and atypically shares greater sequence similarity to the pyrimidine hydrolases. Bioinformatic analysis of this enzyme, adenosine/guanosine-preferring nucleoside ribohydrolase (AGNH), was incapable of identifying the residues responsible for this uncommon specificity, highlighting the need for structural information. Here, we report the X-ray crystal structures of holo, unliganded AGNH and three additional structures of the enzyme bound to fragment and small-molecule inhibitors. Taken together, these structures facilitated the identification of residue Asp231, which engages in substrate interactions in the absence of those residues that typically support the canonical purine-specific tryptophan-stacking specificity motif. An altered substrate-binding pose is mirrored by repositioning within the protein scaffold of the His80 general acid/base catalyst. The newly defined structure-determined sequence markers allowed the assignment of additional NH orthologs, which are proposed to exhibit the same specificity for adenosine and guanosine alone and further delineate specificity classes for these enzymes.

Short-term Outcomes After Pectus Excavatum Repair in Adults and Children.

BACKGROUND: Pectus excavatum is a common congenital chest wall deformity often repaired during adolescence, although a subset of patients undergo repair as adults. The goal of our study was to determine the effects of age at repair and repair technique on short-term surgical outcomes. MATERIALS AND METHODS: We performed a cohort study of patients in the 2012 to 2016 American College of Surgeons National Surgical Quality Improvement Project pediatric (age<18 y) and adult databases who underwent pectus excavatum repair. The primary outcome was the incidence of 30-d complications. Secondary outcomes included length of stay, reoperation, and readmission. Multivariable logistic regression was used to estimate the independent effects of patient age and type of repair on postoperative outcomes. RESULTS: Of the 2268 subjects included, 2089 (92.1%) were younger than 18 y. Overall, 3.4% of patients suffered a 30-d complication, and the risk was similar between age groups (risk ratio [RR], 0.69; 95% confidence interval [CI], 0.08-5.03; P = 0.731). Steroid therapy was an independent risk factor for complications (RR, 8.0; 95% CI, 1.9-19.7; P = 0.006). Median length of stay was 4 d (interquartile range, 3-5) and was similar between age groups. Risk for readmission and reoperation were 2.8% and 1.5%, respectively, and were similar for pediatric and adult patients. When comparing minimally invasive repair with and without thoracoscopy, risk for 30-d complications was lower among patients repaired with thoracoscopy (RR, 0.56; CI, 0.32-0.96; P = 0.034). CONCLUSIONS: Pediatric and adult patients experience comparable rates of postoperative complications, readmission, and reoperation after pectus excavatum repair. Use of thoracoscopy during minimally invasive repair is associated with lower risk of complications. These findings suggest that thoracoscopy should be used routinely for minimally invasive repair of pectus excavatum.

Histological study of the occipital bone from patients with Chiari I malformation.

BACKGROUND: This study is focused on the histologic characteristics of occipital bone removed during Chiari I decompression in the hope of discovering unique features that may be related to the pathogenesis of this condition. METHODS: Ten consecutive pediatric patients with Chiari I malformation underwent standard posterior fossa decompression surgery. Bone that was removed from the posterior fossa was sent for histological examination. Bone from age-matched controls also underwent histological analysis. RESULTS: For all study and control specimens, bony samples were found to be made up of dense lamellar bone without marrow elements. In all aspects, histologically, the bone tissue had a normal appearance compared to control samples. CONCLUSIONS: Although many authors have mentioned that the occipital bone in patients with Chiari I malformation is abnormal on imaging or at operation (e.g., thinned, thickened), based on our study, there is no histological difference between the occipital bone removed at operation and controls.

Adenosine/guanosine preferring nucleoside ribohydrolase is a distinct, druggable antitrichomonal target.

Nucleoside salvage pathway enzymes used by Trichomonas vaginalis are distinct from the pathway involved in activation of existing 5-nitroimidazole drugs. They thus represent excellent targets for developing novel, mechanism-based antitrichomonal agents. The purine-specific adenosine/guanosine preferring ribohydrolase (AGNH) was screened against the NIH Clinical Collection to assess its druggability. Eight compounds, including five flavonoids, were identified with IC50 values ⩽10 µM and confirmed in counter screens run in the presence of detergent. The inhibitors are structurally distinct from inhibitors of the pyrimidine-specific uridine ribohydrolase (UNH) thus indicating that AGNH is a distinct, druggable target from UNH.

Hiatal Hernia After Esophagectomy: A Single-Center Retrospective Analysis of a Rare Postoperative Phenomenon.

Development of a post-esophagectomy hiatal hernia (PEHH) is a rare, but problematic, sequela with the current reported prevalence ranging up to 20%. To determine the incidence rate of PEHH at our institution, a retrospective review of all transhiatal esophagectomies performed from 2012 to 2020 was conducted. Demographic, operative, and oncologic data were collected, rates of PEHH were calculated, and characteristics of subsequent repair were reviewed and analyzed. A total of 160 transhiatal esophagectomies were included, of which four patients (2.5%) developed a PEHH at a mean of 12 months postoperatively (range: 3-28 months) with symptomatology driving the diagnosis for three patients. The limited size of our study does not allow for statistically significant determinations regarding risk factors or method of repair. The true prevalence of a hiatal defect is likely higher than reported, as clinically asymptomatic patients are not captured in our current literature.

Is Cystogastrostomy a Definitive Operation for Pancreatitis Associated Pancreatic Fluid Collections?

BACKGROUND: Pancreatic-enteric drainage procedures have become standard therapy for symptomatic pancreatic pseudocysts and walled-off pancreatic necrosis. The need for pancreatic resection after cyst-enteric drainage procedure in the event of recurrence is not well studied. This study aimed to quantify the percentage of patients requiring resection due to recurrence after surgical cystogastrostomy and identify predictors of drainage failure. METHODS: A single-institution retrospective review was conducted to identify all patients undergoing surgical cystogastrostomy between 2012 and 2020. Demographic, disease, and treatment characteristics were identified. Failure of surgical drainage was defined as the need for subsequent pancreatic resection due to recurrence. Characteristics between failure and nonfailure groups were compared with identifying predictors of treatment failure. RESULTS: Twenty-four cystogastrostomies were performed during the study period. Three patients (12.5%) required a subsequent distal pancreatectomy after surgical drainage. There was no difference in comorbidities between drainage alone and failure of drainage groups. Mean cyst size seemed to be larger in patients that underwent drainage alone versus those that needed subsequent resection (15.2 vs 10.3 cm, P =0.05). Estimated blood loss at initial operation was similar between groups (126 vs 166 mL, P =0.36). CONCLUSION: Surgical pancreatic drainage was successful in the initial management of pancreatic fluid collections. We did not identify any predictors of failure of initial drainage. There was a trend suggesting smaller cyst size may be associated with cystgastrostomy failure. Resection with distal pancreatectomy for walled-off pancreatic necrosis and pancreatic pseudocysts can be reserved for cases of failure of drainage.

To Wrap or Not to Wrap After Heller Myotomy.

BACKGROUND AND OBJECTIVES: The primary aim of this study is to assess the necessity of fundoplication for reflux in patients undergoing Heller myotomy for achalasia. The secondary aim is to assess the safety of the robotic approach to Heller myotomy. METHODS: This is a single institution, retrospective analysis of 61 patients who underwent robotic Heller myotomy with or without fundoplication over a 4-year period (January 1, 2015 - December 31, 2019). Symptoms were evaluated using pre-operative and postoperative Eckardt scores at < 2 weeks (short-term) and 4 - 55 months (long-term) postoperatively. Incidence of gastroesophageal reflux and use of antacids postoperatively were assessed. Long-term patient satisfaction and quality of life (QOL) were assessed with a phone survey. Finally, the perioperative safety profile of robotic Heller myotomy was evaluated. RESULTS: The long-term average Eckardt score in patients undergoing Heller myotomy without fundoplication was notably lower than in patients with a fundoplication (0.72 vs 2.44). Gastroesophageal reflux rates were lower in patient without a fundoplication (16.0% vs 33.3%). Additionally, dysphagia rates were lower in patients without a fundoplication (32.0% vs 44.4%). Only 34.8% (8/25) of patients without fundoplication continued use of antacids in the long-term. There were no mortalities and a 4.2% complication rate with two delayed leaks. CONCLUSION: Robotic Heller myotomy without fundoplication is safe and effective for achalasia. The rate of reflux symptoms and overall Eckardt scores were low postoperatively. Great patient satisfaction and QOL were observed in the long term. Our results suggest that fundoplication is unnecessary when performing Heller myotomy.

Robotic choledochoduodenostomy for benign distal common bile duct stricture: how we do it.

Benign bile duct stricture poses a significant challenge for gastroenterologists and general surgeons due to the inherent nature of the disease, difficulty in sustaining long-term solutions and fear of pitfalls in performing biliary tract operations. Operative management with an open biliary bypass is mainly reserved for patients who have failed multiple attempts of endoscopic and percutaneous treatments. However, recent advances in minimally invasive technology, notably in the form of the robotics, have provided a new approach to tackling biliary disease. In this technical report, we describe our standardized method of robotic choledochoduodenostomy in a 59-year-old woman with history of Roux-en-Y gastric bypass who presents with benign distal common bile duct stricture following failure of non-operative management. Key steps in this approach involved adequate duodenal Kocherization, robotic portal dissection and creation of a side-to-side choledochoduodenal anastomosis. The operative time was 200 min with no intraoperative complications and estimated blood loss was less than 50 mL. No abdominal drains were placed. The patient was discharged home on postoperative day 1 tolerating regular diet and able to resume her usual activities within 1 week of her operation. A video is attached to this report.

Ligand-Efficient Inhibitors of Trichomonas vaginalis Adenosine/Guanosine Preferring Nucleoside Ribohydrolase.

Trichomoniasis is caused by the parasitic protozoan Trichomonas vaginalis and is the most prevalent, nonviral sexually transmitted disease. The parasite has shown increasing resistance to the current 5-nitroimidazole therapies indicating the need for new therapies with different mechanisms. T. vaginalis is an obligate parasite that scavenges nucleosides from host cells and then uses salvage pathway enzymes to obtain the nucleobases. The adenosine/guanosine preferring nucleoside ribohydrolase was screened against a 2000-compound diversity fragment library using a 1H NMR-based activity assay. Three classes of inhibitors with more than five representatives were identified: bis-aryl phenols, amino bicyclic pyrimidines, and aryl acetamides. Among the active fragments were 10 compounds with ligand efficiency values greater than 0.5, including five with IC50 values <10 µM. Jump-dilution and detergent counter screens validated reversible, target-specific activity. The data reveals an emerging SAR that is guiding our medicinal chemistry efforts aimed at discovering compounds with nanomolar potency.