Publications by authors named "Aaron Delman"

Background: Long-term outcomes of HBV nucleic acid test (NAT)-positive (+) allograft use in seronegative liver transplant (LT) and kidney transplant (KT) recipients remains unknown despite being incorporated into practice by select centers. This study compares long-term outcomes between HBV NAT+ and NAT-negative (-) allografts in seronegative recipients.

Study Design: All recipients of an HBV core antibody-positive (HBcAb+) LT or KT were prospectively evaluated at a single transplant center from 6/2015-3/2023 and compared by NAT status.

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Background: The implementation of acuity circles (AC) in 2020 and the COVID-19 pandemic increased the use of local surgeons to recover livers for transplant; however, the impact on liver transplant (LT) outcomes is unknown.

Methods: Deceased donor adult LT recipients from the UNOS database were identified.  Recipients were grouped by donor surgeon: local versus primary recovery.

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Background: The demand for liver transplants (LT) in the United States far surpasses the availability of allografts. New allocation schemes have resulted in occasional difficulties with allograft placement and increased intraoperative turndowns. We aimed to evaluate the outcomes related to use of late-turndown liver allografts.

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Background: Underrepresented minority patients with surgical malignancies experience disparities in outcomes. The impact of provider-based factors, including communication, trust, and cultural competency, on outcomes is not well understood. This study examines modifiable provider-based barriers to care experienced by patients with surgical malignancies.

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Importance: A new liver allocation policy was implemented by United Network for Organ Sharing (UNOS) in February 2020 with the stated intent of improving access to liver transplant (LT). There are growing concerns nationally regarding the implications this new system may have on LT costs, as well as access to a chance for LT, which have not been captured at a multicenter level.

Objective: To characterize LT volume and cost changes across the US and within specific center groups and demographics after the policy implementation.

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Introduction: Grade-C postoperative pancreatic fistulas (POPFs) are dreaded complications following pancreaticoduodenectomy. The aim of this study was to quantify the incidence and risk factors associated with grade C POPF in a national database.

Methods: The National Surgical Quality Improvement Program targeted user files were queried for patients who underwent elective pancreaticoduodenectomy (2014-2020).

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Background: The aim of this study was to examine sex differences in academic rank and productivity among members of the American Society of Transplant Surgeons in the United States.

Methods: Cross-sectional, focusing on current board-certified abdominal transplant surgeons in the United States. Demographic factors such as sex, region, and faculty rank were collected from institutional websites.

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Background: Robotic pancreaticoduodenectomy (RPD) is a safe and efficacious procedure in appropriately selected patients, though frequently with increased operative times compared to open pancreaticoduodenectomy (OPD).

Methods: From 2014 to 2019, patients who underwent elective, low-risk, RPDs and OPDs in the NSQIP database were isolated. The operative time threshold (OTT) for safety in RPD patients was estimated by identifying the operative time at which complication rates for RPD patients exceeded the complication rate of the benchmark OPD control.

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Introduction: Negative pressure wound therapy (NPWT) is utilized early after soft tissue injury to promote tissue granulation and wound contraction. Early post-injury transfers via aeromedical evacuation (AE) to definitive care centers may actually induce wound bacterial proliferation. However, the effectiveness of NPWT or instillation NPWT in limiting bacterial proliferation during post-injury AE has not been studied.

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Background: Feeding jejunostomy (JT) tubes are often utilized as an adjunct to optimize nutrition for successful esophagectomy; however, their utility has come into question. The aim of this study was to evaluate utilization and outcomes associated with JTs in a nationwide cohort of patients undergoing esophagectomy.

Methods: The NSQIP database was queried for patients who underwent elective esophagectomy.

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Article Synopsis
  • The study assesses the long-term survival and outcomes of liver transplant patients who required temporary abdominal closure versus those who had primary fascial closure, using data from 2013 to 2017 with a 5-year follow-up.
  • Among 436 liver transplants, 17.2% needed temporary closure, which was associated with higher preoperative sickness (like higher MELD scores and more dialysis), and these patients also experienced longer hospital stays and higher readmission rates within 30 days.
  • While initial 1-year survival rates were lower for those with temporary closure (82.7% vs 90.9%), 5-year survival rates were not significantly different, indicating that temporary closure is a safe alternative with comparable long-term
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Background: Chronic pancreatitis is a debilitating, life-altering disease; however, the long-term outcomes after operative intervention have not been established.

Study Design: Patients who underwent operative intervention at a single institution between 2000 and 2020 for chronic pancreatitis were included, and survival was assessed using the National Death Index.

Results: A total of 493 patients who underwent 555 operative interventions for chronic pancreatitis during 2 decades were included.

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Introduction: Robotic-assisted minimally invasive esophagectomy (RAMIE) in clinical trials has demonstrated improved outcomes compared to open esophagectomy (OE). However, outcomes after national implementation remain unknown. The aim of this study was to evaluate postoperative outcomes after RAMIE.

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Background: Transplant surgery fellowship is physically and emotionally demanding. The objective of this study was to characterize biophysiological stress and sleep patterns among transplant surgery fellows.

Methods: Participating fellows wore a biophysical monitor over a 28-day period and completed biweekly surveys.

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Introduction: The COVID-19 pandemic forced a sudden change from in-person to virtual interviews for the general surgery residency match. General surgery programs and applicants adopted multiple strategies to best mimic in-person recruitment. The purpose of this study was to evaluate applicant opinions of the virtual recruitment format.

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Fellowship training established by the American Society of Transplant Surgeons and certified by the Transplant Accreditation and Certification Council provides trainees with broad exposure and practice readiness for the core aspects of abdominal transplantation. However, the operative case mix of a new transplant surgeon early in practice is unknown. This study examined the volume and composition of the transplant case mix of early-career transplant surgeons to better inform residents interested in transplantation about potential career opportunities following fellowship.

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Background: Whether formal regional lymph node (LN) evaluation is necessary for patients with appendiceal adenocarcinoma (AA) who have peritoneal metastases is unclear. The aim of this study was to evaluate the prognostic value of LN metastases on survival in patients treated with cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS-HIPEC).

Methods: A retrospective analysis of the US HIPEC collaborative, a multi-institutional consortium comprising 12 high-volume centers, was performed to identify patients with AA who underwent CRS-HIPEC with adequate LN sampling (≥ 12 LNs).

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Background: Islet cell autotransplantation is an effective method to prevent morbidity associated with type IIIc diabetes after total pancreatectomy. However, there is no valid method to predict long-term endocrine function. Our aim was to assess computed tomography texture analysis as a strategy to predict long-term endocrine function after total pancreatectomy and islet cell autotransplantation.

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Background: The Bethesda System for Reporting Thyroid Cytopathology was formalized in 2007 to stratify cytologic specimens based on their risk of malignancy. Several studies have reported significant variations between their institutional rate of malignancy compared to the Bethesda System for Reporting Thyroid Cytopathology. The objective of this study was to determine the national rate of malignancy for Bethesda III, Bethesda IV, and Bethesda V thyroid nodules.

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Background: The prevalence of burnout and depression among abdominal transplant surgeons has been well described. However, the incidence of early-career transplant surgeons leaving the field is unknown. The objective of this study was to quantify the incidence of attrition among early-career abdominal transplant surgeons.

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Background: Surgical stabilization of rib fractures (SSRF) is an accepted efficacious treatment modality for patients with severe chest wall injuries. Despite increased adoption of SSRF, surgical learning curves are unknown. We hypothesized intraoperative duration could define individual SSRF learning curves.

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Background: Microsatellite instability (MSI) has been associated with improved overall survival (OS) in locoregional colorectal cancer; however, the effects on colorectal liver metastases (CRLM) have not been studied.

Methods: The National Cancer Database (NCDB) was queried for patients with CRLM that underwent metastasectomy. Patients with microsatellite stable tumors (MSS) (n = 2,316, 84.

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