Publications by authors named "Rahmel A"

This review describes the risks and benefits of expanding screening for transmissible pathogens in deceased organ donors. The focus is on the experience and procedure in Germany to make a decision on how to proceed with a possible donor. Three issues are of interest in how screening policies impact the process with the aim of mitigating unexpected transmission risks: (1) Should we add universal or targeted nucleic acid testing to serological tests for common blood-borne viruses (BBVs; HIV, HBV, and HCV)? (2) Which tests should be added for screening in a geographically restricted region beyond testing for these BBVs? (3) Being faced with changes (e.

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Aim: Often, organ transplantation is the only option to improve the life expectancy and quality of life of patients with terminal organ failure. Despite improved donor and organ assessment, a residual risk remains for transmitting infection, tumor, or other disease from the donor to recipients. Analysis, reporting, and managing of donor-derived diseases through a vigilance and surveillance system (V&S) is mandatory in many countries.

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Background: Rigid age limits in the current allocation system for post-mortem donor kidneys in Germany may have problematic effects. The new German national transplantion registry enables data analysis with respect to this question.

Methods: Using anonymized data from the German national transplantion registry, we extracted and evaluated information on the recipients and postmortem donors of kidneys that were allocated in Germany through Eurotransplant over the period 2006-2020.

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Article Synopsis
  • The review investigates the structure and data capture methods of organ donation and transplantation (ODT) registries worldwide, finding 129 active registries across multiple continents.
  • Most registries are funded by governments or professional societies, covering various organs and collecting extensive patient-level data, although there are gaps in certain areas like donor comorbidities and waitlist stats.
  • The authors advocate for standardized practices and better data management to enhance the effectiveness and transparency of ODT systems, ultimately benefiting candidates, recipients, and donors.
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The primary aim of this study was to describe regulations and practices concerning the family approach to discuss donation, specifically after the neurological determination of death, one of the most challenging steps in the donation pathway. A secondary objective was to assess the impact of legislation on consent rates for organ donation. The Council of Europe surveyed 39 member states about national regulations, practices, and consent rates; 34 replied.

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The reporting of serious adverse events (SAE) and serious adverse reactions (SAR) is an essential part of an effective vigilance and surveillance system (V&S) in organ donation and transplantation. All SAE and SAR reported to the German organ procurement organization (DSO) between 2016 and 2022 were analyzed. In case of a possible transmission of a disease to one or more recipients, an assessment of imputability was done according to the grading system of the US Disease Transmission Advisory Committee (DTAC).

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The Eurotransplant Senior Program (ESP) has expedited the chance for elderly patients with kidney failure to receive a timely transplant. This current study evaluated survival parameters of kidneys donated after brain death with or without matching for HLA-DR antigens. This cohort study evaluated the period within ESP with paired allocation of 675 kidneys from donors 65 years and older to transplant candidates 65 years and older, the first kidney to 341 patients within the Eurotransplant Senior DR-compatible Program and 334 contralateral kidneys without (ESP) HLA-DR antigen matching.

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Background: In order to achieve short ischemia times between organ donation and transplantation, regional organ allocation has been assigned priority in the development of allocation rules for kidney transplantation. It is unclear whether this leads to differences in regional waiting times in Germany.

Methods: A retrospective cohort study over a 24-month observation period was conducted, including all patients who received a kidney-only graft allocated via the standard Eurotransplant Kidney Allocation System (ETKAS) (n = 1487) or the Eurotransplant Senior Program (ESP) (n = 566).

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Article Synopsis
  • - The study analyzed kidney transplantation (KT) trends across 40 European countries from 2010 to 2018, focusing on total, deceased donor (DD), and living donor (LD) rates using data from the ERA Registry and GODT databases.
  • - Overall, the total KT rate rose by 1.9% annually, with increases in both DD-KT (3.4 p.m.p.) and LD-KT (1.5 p.m.p.), but significant variations were noted among different countries, particularly between East and West Europe.
  • - By 2018, Spain reported the highest DD-KT rate at 64.6 p.m.p., while Turkey had the highest LD-KT rate at
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Background: Transplant therapy is considered the best and often the only available treatment for thousands of patients with organ failure that results from communicable and noncommunicable diseases. The number of annual organ transplants is insufficient for the worldwide need.

Methods: We elaborate the proceedings of the workshop entitled "The Role of Science in the Development of International Standards of Organ Donation and Transplantation," organized by the Pontifical Academy of Sciences and cosponsored by the World Health Organization in June 2021.

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Background: Assignment of unacceptable HLA mismatches (UAMs) prevents transplantation of incompatible grafts but potentially prolongs waiting time. Whether this is true in the Eurotransplant Kidney Allocation System (ETKAS) and the Eurotransplant Senior Program in Germany is highly debated and relevant for UAM policies.

Methods: Donor pool restriction due to UAM was expressed as percent virtual panel-reactive antibodies (vPRAs).

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Background: At Eurotransplant (ET), kidneys are transferred to "rescue allocation" (RA), whenever the standard allocation (SA) algorithms Eurotransplant Kidney Allocation System (ETKAS) and Eurotransplant Senior Program (ESP) fail. We analyzed the outcome of RA.

Methods: Retrospective patient clinical and demographic characteristics association analyses were performed with graft outcomes for 2422 recipients of a deceased donor renal transplantation (DDRT) after RA versus 25 481 after SA from 71 centers across all ET countries from 2006 to 2018.

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The access of non-resident patients to the deceased donor waiting list (DDWL) poses different challenges. The European Committee on Organ Transplantation of the Council of Europe (CD-P-TO) has studied this phenomenon in the European setting. A questionnaire was circulated among the Council of Europe member states to inquire about the criteria applied for non-residents to access their DDWL.

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Background: Access to various kidney replacement therapy (KRT) modalities for patients with end-stage kidney disease differs substantially within Europe.

Methods: European adults on KRT filled out an online or paper-based survey about factors influencing and experiences with modality choice (e.g.

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Background: Access to forms of dialysis, kidney transplantation (Tx) and comprehensive conservative management (CCM) for patients with end-stage kidney disease (ESKD) varies across European countries. Attitudes of nephrologists, information provision and decision-making may influence this access and nephrologists may experience several barriers when providing treatments for ESKD.

Methods: We surveyed European nephrologists and kidney transplant surgeons treating adults with ESKD about factors influencing modality choice.

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The aims of this study were to determine the frequency of dialysis and kidney transplantation and to estimate the regularity of comprehensive conservative management (CCM) for patients with kidney failure in Europe. This study uses data from the ERA-EDTA Registry. Additionally, our study included supplemental data from Armenia, Germany, Hungary, Ireland, Kosovo, Luxembourg, Malta, Moldova, Montenegro, Slovenia and additional data from Israel, Italy, Slovakia using other information sources.

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Background:  The lack of suitable allografts limits the availability of liver transplantation in Germany. The quality of potentially available German donor livers has to date not been analyzed.

Methods:  Analysis of all donors for potential liver transplantations reported to the Eurotransplant by the German Organ Transplantation Foundation from 2010 to 2018.

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In recent years, the diagnosis of irreversible brain function loss in severely brain-damaged patients has gained in importance. Brain death, defined as an irreversible loss of the overall function of the cerebrum, cerebellum and brain stem, is a prerequisite for organ removal in the context of organ donation. The article presents the legal and organizational framework.

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In Germany, the scarcity of donor organs has persisted over decades and reached an historical low point in the year 2017. A thorough analysis of the causes revealed structural deficits in the identification and registration of possible donors as one of the central reasons for the low donation rate. This prompted the political authorities to act and resulted in two new laws, which led to a modification of the German Transplantation Act.

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Heart and lung procurements are multiphased processes often accompanied by an array of complex logistics. Approaches to donor evaluation and management, organ procurement, and organ preservation vary among individual procurement teams. Because early graft failure remains a major cause of mortality in contemporary thoracic organ transplant recipients, we sought to establish some standardization in the procurement process.

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Article Synopsis
  • The Eurotransplant kidney allocation system permits unlimited re-transplantation, but the benefits and outcomes remain unclear.
  • A 15-year study analyzed data from 1,464 patients undergoing third or higher kidney transplants, finding these recipients were younger and had better HLA matches but did not show improved outcomes.
  • Results indicated that mortality, graft loss, and primary nonfunction rates were significantly higher in recipients of third or greater transplants compared to first transplants, prompting a reevaluation of current re-transplantation policies.
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Background: The indications, implementation and reporting of liver biopsies for deceased organ donation are not mandatory or regulated. Reliable data on outcome quality and prognostic relevance are therefore not available. Defined standards are thus required to enable meaningful studies and to ensure high data quality of a national transplantation registry.

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Background And Objectives: The prognostic value of preformed donor-specific HLA antibodies (DSA), which are only detectable by sensitive methods, remains controversial for kidney transplantation.

Design, Setting, Participants, & Measurements: The outcome of 4233 consecutive kidney transplants performed between 2012 and 2015 in 18 German transplant centers was evaluated. Most centers used a stepwise pretransplant antibody screening with bead array tests and differentiation of positive samples by single antigen assays.

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