Publications by authors named "Abbas Rana"

Recipient and donor risk factors impacting adult liver retransplantation remain inadequately described in the modern era of liver transplantation. Our study aimed to develop a risk model for 3-month recipient survival following liver retransplantation using data from the Organ Procurement and Transplantation Network's (OPTN) liver transplantation database. We conducted univariate and multivariable analyses on 6,660 adult patients who underwent liver retransplantation between 2002 and 2023.

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Background: Pediatric lung transplant (LT) outcomes correlate with prolonged length of stay (pLOS), yet a paucity of research exists predicting pLOS in this population. We aim to identify factors associated with pLOS following pediatric LT, and to create a risk score identifying individual patients at increased risk of pLOS.

Methods: Using the OPTN database, we analyzed 733 pediatric patients who received an LT between January 2000-July 2022.

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Background And Aims: This study assesses the attitudes of healthcare practitioners toward Living Donation Prior to Planned Withdrawal of Care (LD-PPW): the recovery of a living donor organ before withdrawal of life-sustaining measures in a patient who does not meet criteria for brain death, but for whom medical care toward meaningful recovery is deemed futile.

Methods: An electronic survey was administered to 1735 members of the American Society of Transplant Surgeons mailing list with 187 responses (10.8%).

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Background: Waitlist and posttransplant outcomes have been widely reported for pediatric liver transplantation. Yet, analyzing these metrics individually fails to provide a holistic perspective for patients and their families. Intent-to-treat (ITT) analysis fills this gap by studying the associations between waitlist outcomes, organ availability, and posttransplant outcomes.

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Mini abstracts: Faculty at the Baylor College of Medicine have developed a flexible research collaborative through which students gain research skills and individualized mentorship. This division has produced 86 trainee first author publications, 64 manuscripts by 34 different medical students with an average Scimago Journal Rank of 1.293 (range: 1.

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Objective: Intent-to-treat analysis follows patients from listing to death, regardless of their transplant status, and aims to provide a more holistic scope of the progress made in adult solid-organ transplantation.

Background: Many studies have shown progress in waitlist and post-transplant survival for adult kidney, liver, heart, and lung transplants, but there is a need to provide a more comprehensive perspective of transplant outcomes for patients and their families.

Methods: Univariable and multivariable Cox regression analyses were used to analyze factors contributing to intent-to-treat survival in 813,862 adults listed for kidney, liver, heart, and lung transplants.

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Background: Children listed for heart transplantation face the highest waitlist mortality among all solid organ transplant patients (14%). Attempts at decreasing donor allograft non-utilization (41.5%) could potentially decrease waitlist mortality for pediatric heart transplant patients.

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Background: Wheat, an important cereal crop, is commonly cultivated in arid and semiarid areas, and therefore, it often experiences water deficit conditions. The consequences of induced stress on wheat can be mitigated through vermicompost amendments. To address drought stress on wheat seedlings, a pot experiment was conducted in the wire-house in which two contrasting wheat cultivars, Faisalabad-08 (drought-tolerant) and Galaxy-13 (drought-sensitive), were exposed to three water level conditions: well-watered [D0, 70% of field capacity (FC)], moderate drought (D1, 45% FC), and severe drought (D2, 30% FC).

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Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN) is a rare spectrum of acute, mucocutaneous drug reactions characterized by epidermal necrosis of the skin and mucous membranes with progressive multiorgan failure. Cutaneous presentation of SJS/TEN is similar to that of acute graft-versus-host disease, creating a diagnostic dilemma in solid-organ transplant recipients presenting with diffuse, erythematous eruptions, skin sloughing, and systemic sequelae, reflective of both diseases. This case report details a 48-year-old woman post-orthotopic liver transplantation (OLT) who developed a diffuse, painful, morbilliform rash with progressive desquamation, along with corresponding pathological analysis indicative of SJS/TEN.

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Background: Over one thousand pediatric kidney transplant candidates are added to the waitlist annually, yet the prospective time spent waiting is unknown for many. Our study fills this gap by identifying variables that impact waitlist time and by creating an index to predict the likelihood of a pediatric candidate receiving a transplant within 1 year of listing. This index could be used to guide patient management by giving clinicians a potential timeline for each candidate's listing based on a unique combination of risk factors.

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BACKGROUND Patients with high-acuity liver failure have increased access to marginal and split liver options, owing to historically high waitlist mortality rates. While most research states that donor liver quality has no impact on patients with high-acuity illness, there have been inconsistencies in recent research on how liver quality impacts post-transplant outcomes for these patients. We aimed to quantify donor liver quality with various post-transplantation patient outcomes for patients with high-acuity illness.

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Article Synopsis
  • Hypothermic oxygenated machine perfusion (HMP-O2) is a new technique for preserving liver grafts, showing better results against traditional static cold storage (SCS) by reducing ischemia-reperfusion injury.
  • The PILOT trial, a multicenter randomized study, involved 179 participants divided between HMP-O2 and SCS; results indicated noninferiority, with early allograft dysfunction rates of 11.1% for HMP-O2 compared to 16.4% for SCS.
  • HMP-O2 also associated with a lower risk of early graft failure, primary nonfunction, and biliary strictures, suggesting it may enhance liver transplant outcomes in clinical settings.
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The liver donor risk index (LDRI) was developed by Feng et al to predict the quality of donor liver allografts. However, there is currently no literature documenting the application and efficacy of Feng's LDRI specifically for the pediatric population. The goal of our study is to apply Feng's LDRI to our study population as well as develop a pediatric-specific LDRI.

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Background: Children at high risk for prolonged mechanical ventilation (PMV) after liver transplantation (LT) need to be identified early to optimize pulmonary support, allocate resources, and improve surgical outcomes. We aimed to develop and validate a metric that can estimate risk for Prolonged Ventilation After LT (PROVE-ALT).

Methods: We identified preoperative risk factors for PMV by univariable analysis in a retrospective cohort of pediatric LT recipients between 2011 and 2017 (n = 205; derivation cohort).

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Introduction: There are limited longitudinal data on the cost of treating patients with cirrhosis, which hampers value-based improvement initiatives.

Methods: We conducted a retrospective cohort study of patients with cirrhosis seen in the Veterans Affairs health care system from 2011 to 2015. Patients were followed up through 2019.

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Background: Kidney transplants (KT) are accepted as the kidney replacement therapy of choice for children with kidney failure. The surgery itself may be more difficult especially in small children, and often leads to significant hospital stays. There is little research on predicting prolonged length of stay (LOS) in children.

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Background: Lung transplantation median survival has seen improvements due to recognition of short-term survival factors but continues to trail behind other solid organs due to limited understanding of long-term survivorship. Given the creation of the United Network for Organ Sharing (UNOS) database in 1986, it was difficult to accrue data on long-term survivors until recently. This study characterizes factors impacting lung transplant survival beyond 20 years, conditional to 1-year survival.

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Importance: Transplantation has transformed into a burgeoning field that is rapidly evolving to optimize organ distribution and survival outcomes. The years since 2012 (the last comprehensive study) have seen changes in transplantation, such as advances in immunotherapy and novel indices, that necessitate an updated analysis of survival benefit.

Design: Our goal was to determine the survival benefit for solid-organ transplants in the United Network for Organ Sharing (UNOS) database for a three decade period and provide updates on advancements since 2012.

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Background: Human leukocyte antigens (HLA) matching is gradually being omitted from clinical practice in evaluation for renal allograft transplant. While such practices may yield shorter wait times and adequate short-term outcomes, graft longevity in HLA mismatched patients remains unclear. This study aims to demonstrate that HLA matching may still play an important role in long-term graft survival.

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Article Synopsis
  • - The study focuses on predicting the risk of hepatocellular carcinoma (HCC) recurrence after liver transplantation (LT) using data from over 4,900 patients, emphasizing the need for personalized assessment due to high recurrence rates.
  • - Researchers developed the RELAPSE score, which utilizes clinicopathological and radiological factors, validated through advanced statistical and machine learning methods, to enhance the accuracy of recurrence predictions in HCC patients post-LT.
  • - Key independent predictors of HCC recurrence identified include alpha-fetoprotein levels, tumor size, and vascular invasion, with a 5-year recurrence rate of 12.5% and a more robust predictive model achieved through machine learning techniques.
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Unlabelled: Donation after circulatory death (DCD) allografts might represent one of the largest untapped sources of liver allografts. Our aim was to identify independent recipient risk factors that predict mortality in DCD allograft recipients to preselect optimal candidates for successful transplantation. Furthermore, we compared the application of our newly constructed DCD Recipient Selector Index (RSI) score to previously developed models to determine superiority in predicting recipient survival.

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Background: The impact of indication for pediatric liver transplantation on waitlist and post-transplant mortality outcomes is well known, but the impact on intent-to-treat outcomes has not been investigated. Intent-to-treat survival analysis is important in this study because it is more comprehensive, combining the transplant outcomes of waitlist mortality, post-transplant mortality, and transplant rate into a single metric to elucidate any disparities in outcomes based on indication.

Methods: Cox regression was used to analyze factors impacting survival in 8,002 children listed for liver transplant in the UNOS database between 2006 and 2016.

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