Publications by authors named "Abt P"

Many inherited metabolic disorders (IMD) are associated with end-organ damage necessitating organ transplantation. Although utilization of deceased donors with history of IMD warrants caution, there may be circumstances under which such donors could be considered as suitable organ donor candidates. We present the first known report of liver transplantation from a deceased donor with cystinosis.

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Article Synopsis
  • Direct-acting antiviral agents have increased the number of patients listed for liver transplantation using hepatitis C virus-positive organs, with a significant jump from 8.8% to 60.8% between 2016 and 2023.
  • Patients listed for HCV NAT-positive organs have shown improved waitlist survival, with a notable reduction in overall mortality compared to those not listed for these organs.
  • Despite the overall increase in listings for HCV NAT-positive organs, disparities still exist based on transplant center practices and geographic locations.
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Liver transplantation (LT) in patients with significant portopulmonary hypertension (PoPH) is associated with an increased risk of several complications, including graft failure. Graft loss is one of the major reasons. Living donor LT (LDLT) is not routinely performed in the United States in this patient population.

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Article Synopsis
  • Traditional transplant centers typically use their own teams for liver recovery after circulatory death (DCD), but there's a need to consider outside teams (nontransplant program procurement teams, NTPT) due to broader organ sharing.
  • A study analyzed national data comparing liver transplants from NTPT and local teams, finding similar one-year liver graft survival rates (88.9% for NTPT vs. 88.6% for TPT).
  • The study concluded that the source of the procurement team didn't significantly impact graft failure, suggesting transplant centers can safely utilize DCD livers from local surgical teams.
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Background: Normothermic regional perfusion (NRP) has emerged as a vital technique in organ procurement, particularly in donation after circulatory death (DCD) cases, offering the potential to optimize organ utilization and improve posttransplant outcomes. Recognizing its significance, the American Society of Transplant Surgeons (ASTS) convened a work group to develop standardized recommendations for abdominal NRP in the United States.

Methods: The workgroup, comprising experts in NRP, DCD, and transplantation, formulated recommendations through a collaborative process involving revisions and approvals by relevant committees and the ASTS council.

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Importance: Centralizing deceased organ donor management and organ recovery into donor care units (DCUs) may mitigate the critical organ shortage by positively impacting donation and recipient outcomes.

Objective: To compare donation and lung transplant outcomes between 2 common DCU models: independent (outside of acute-care hospitals) and hospital-based.

Design, Setting, And Participants: This is a retrospective cohort study of Organ Procurement and Transplantation Network deceased donor registry and lung transplant recipient files from 21 US donor service areas with an operating DCU.

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Background: The prevalence of obesity is rising in the general population. Donor obesity (body mass index ≥30 kg/m) may potentially reduce the donor pool and impact outcomes in living donor liver transplantation (LDLT).

Methods: We utilized the national transplant database to investigate the impact of donor obesity on donor and recipient outcomes.

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Background: The demand for liver transplantation has led to the utilization of marginal grafts including moderately macrosteatotic livers (macrosteatosis ≥30% [Mas30]), which are associated with an elevated risk of graft failure. Machine perfusion (MP) has emerged as a technique for organ preservation and viability testing; however, little is known about MP in Mas30 livers. This study evaluates the utilization and outcomes of Mas30 livers in the era of MP.

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Background: In liver transplantation, advances in ex situ normothermic machine perfusion (NMP) have improved outcomes compared with traditional static cold storage (SCS) in donation after circulatory death (DCD) organs. We aimed to characterize trends in the utilization of NMP versus SCS in DCD liver transplantation in the United States.

Methods: This retrospective cohort study used data from the United Network for Organ Sharing database to identify recipient-donor adult liver transplant pairs from DCD donors from January 2016 to June 2022.

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Article Synopsis
  • Normothermic regional perfusion (NRP) is a promising method for recovering livers from controlled donation after circulatory death (cDCD) donors, potentially enhancing transplant outcomes and expanding the donor pool in the US, where only 11.4% of deceased donor liver transplants are from cDCD donors.
  • This study compared liver transplant outcomes from cDCD donors recovered using NRP versus standard super rapid recovery (SRR) across 17 US transplant centers, focusing on outcomes like ischemic cholangiopathy and post-transplant complications.
  • Results showed that livers recovered via NRP had shorter hospital stays (7 days vs. 10 days) and none experienced primary
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Introduction: As the adult Fontan population with Fontan associated liver disease continues to increase, more patients are being referred for transplantation, including combined heart and liver transplantation.

Methods: We report updated mortality and morbidity outcomes after combined heart and liver transplant in a retrospective cohort series of 40 patients (age 14 to 49 years) with Fontan circulation across two centers from 2006-2022.

Results: The 30-day, 1-year, 5-year and 10-year survival rate was 90%, 80%, 73% and 73% respectively.

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Some United States organ procurement organizations transfer deceased organ donors to donor care units (DCUs) for recovery procedures. We used Organ Procurement and Transplantation Network data, from April 2017 to June 2021, to describe the proximity of adult deceased donors after brain death to DCUs and understand the impact of donor service area (DSA) boundaries on transfer efficiency. Among 19 109 donors (56.

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Given liver transplantation organ scarcity, selection of recipients and donors to maximize post-transplant benefit is paramount. Several scores predict post-transplant outcomes by isolating elements of donor and recipient risk, including the donor risk index, Balance of Risk, pre-allocation score to predict survival outcomes following liver transplantation/survival outcomes following liver transplantation (SOFT), improved donor-to-recipient allocation score for deceased donors only/improved donor-to-recipient allocation score for both deceased and living donors (ID2EAL-D/-DR), and survival benefit (SB) models. No studies have examined the performance of these models over time, which is critical in an ever-evolving transplant landscape.

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Background: In 2015, the United Network for Organ Sharing implemented a policy introducing a 6-mo waiting period before granting model for end-stage liver disease exception points to liver transplant (LT) candidates with hepatocellular carcinoma (HCC). This study analyzes the policy impact on post-LT HCC recurrence.

Methods: This was a United Network for Organ Sharing retrospective cohort study of patients with HCC who underwent LT from January 1, 2010, to May 31, 2019.

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Organ recovery facilities address the logistical challenges of hospital-based deceased organ donor management. While more organs are transplanted from donors in facilities, differences in donor management and donation processes are not fully characterized. Does deceased donor management and organ transport distance differ between organ procurement organization (OPO)-based recovery facilities versus hospitals? Retrospective analysis of Organ Procurement and Transplant Network data, including adults after brain death in 10 procurement regions (April 2017-June 2021).

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Background: Outcomes after living-donor liver transplantation (LDLT) at high Model for End-stage Liver Disease (MELD) scores are not well characterized in the United States.

Methods: This was a retrospective cohort study using Organ Procurement and Transplantation Network data in adults listed for their first liver transplant alone between 2002 and 2021. Cox proportional hazards models evaluated the association of MELD score (<20, 20-24, 25-29, and ≥30) and patient/graft survival after LDLT and the association of donor type (living versus deceased) on outcomes stratified by MELD.

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