14
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      EFFECTS OF COLD ISCHEMIA TIME ON HEPATIC ALLOGRAFT FUNCTION Translated title: EFEITOS DO TEMPO DE ISQUEMIA FRIA SOBRE OS ENXERTOS HEPÁTICOS

      research-article

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          ABSTRACT

          Background :

          Cold ischemia time is related to success of liver transplantation.

          Aim :

          To compare the impact of cold ischemia time on allografts locally collected to those collected distantly.

          Methods :

          Were evaluated 83 transplantations. The patients were divided in two groups: those who received liver grafts collected from cities out of Curitiba (n=42) and locally (n=41). From the donors were compared: cause of death, days at ICU, cardiac arrest, vasoactive drugs, lab exams, gender, age, and BMI. Were compared the subsequent information of receptors: cold ischemia time, warm ischemia time, length of surgery, lab exams, etiology of cirrhosis, MELD score, age, gender, histology of graft, use of vasoactive drugs, and blood components transfusion. Were evaluated the correlation between cold ischemia time and lab results.

          Results :

          The liver grafts collected from other cities were submitted to a longer cold ischemia time (500±145 min) compared to those locally collected (317,85±105 min). Donors from other cities showed a higher serum sodium level at donation (154±16 mEq/dl) compared to those from Curitiba (144±10 mEq/dl). The length of cold ischemia time was related to serum levels of ALT and total bilirubin.

          Conclusion :

          Liver grafts distantly collected underwent longer cold ischemia times, although it caused neither histologic injuries nor higher transfusion demands. There is a correlation between cold ischemia time and hepatic injury, translated by elevation of serum ALT and total bilirubin levels.

          RESUMO

          Racional :

          O tempo de isquemia fria está relacionado ao sucesso do transplante hepático.

          Objetivo :

          Comparar o impacto do tempo dela sobre enxertos captados localmente com os distantes.

          Métodos :

          Avaliaram-se 83 transplantes. Os pacientes foram divididos em dois grupos: enxertos captados fora de Curitiba (n=42) e captados localmente (n=41). Dos doadores compararam-se causa do óbito, dias de UTI, parada cardíaca, drogas vasoativas, exames laboratoriais, gênero, idade e IMC. Dos receptores seguintes dados: tempos de isquemia fria e morna, tempo operatório, exames laboratoriais, causa da cirrose, MELD, idade na operação, gênero, biópsia do enxerto, uso de drogas vasoativas e necessidade de transfusões. Foi realizada avaliação de correlação entre o tempo de isquemia fria e os exames laboratoriais.

          Resultados :

          Os enxertos captados à distância foram submetidos a maior tempo de isquemia fria (500,3±145 min) quando comparados aos captados localmente (317,85±105 min). Os doadores de fora apresentaram níveis mais elevados de sódio no momento da doação (154±16 mEq/dl) comparados aos doadores de Curitiba (144±10 mEq/dl). Houve correlação entre o tempo de isquemia fria e os níveis de ALT e de bilirrubina total. Não houve diferenças ao comparar-se os demais dados.

          Conclusão :

          Enxertos captados à distância sofreram maior tempo de isquemia fria. Isso não refletiu nos prejuízos histológicos nem na demanda transfusional durante o pós-operatório. Houve correlação entre o tempo de isquemia fria e o grau de lesão hepática avaliada pela ALT e pela bilirrubina total.

          Related collections

          Most cited references22

          • Record: found
          • Abstract: not found
          • Article: not found

          HOMOTRANSPLANTATION OF THE LIVER IN HUMANS.

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Diagnosis and monitoring of hepatic injury. I. Performance characteristics of laboratory tests.

            To review information on performance characteristics for tests that are commonly used to identify acute and chronic hepatic injury. A MEDLINE search was performed for key words related to hepatic tests, including quality specifications, aminotransferases, alkaline phosphatase, gamma-glutamyltransferase, bilirubin, albumin, ammonia, and viral markers. Abstracts were reviewed, and articles discussing performance of laboratory tests were selected for review. Additional articles were selected from the references. Guideline Preparation and Review: Drafts of the guidelines were posted on the Internet, presented at the AACC Annual Meeting in 1999, and reviewed by experts. Areas requiring further amplification or literature review were identified for further analysis. Specific recommendations were made based on analysis of published data and evaluated for strength of evidence and clinical impact. The drafts were also reviewed by the Practice Guidelines Committee of the American Association for the Study of Liver Diseases and approved by the committee and the Association's Council. Although many specific recommendations are made in the guidelines, some summary recommendations are discussed here. Alanine aminotransferase is the most important test for recognition of acute and chronic hepatic injury. Performance goals should aim for total error of <10% at the upper reference limit to meet clinical needs in monitoring patients with chronic hepatic injury. Laboratories should have age-adjusted reference limits for enzymes in children, and gender-adjusted reference limits for aminotransferases, gamma-glutamyltransferase, and total bilirubin in adults. The international normalized ratio should not be the sole method for reporting results of prothrombin time in liver disease; additional research is needed to determine the reporting mechanism that best correlates with functional impairment. Harmonization is needed for alanine aminotransferase activity, and improved standardization for hepatitis C viral RNA measurements.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              The mechanisms and strategies to protect from hepatic ischemia-reperfusion injury.

              Hepatic ischemia-reperfusion injury is a major cause of post-operative hepatic dysfunction and liver failure after transplantation. This review summarizes the mechanisms of ischemia-reperfusion injury and analyzes the protective strategies based on the recent developments in the field. Development of hepatic ischemia-reperfusion injury is associated with metabolic acidosis, calcium overloading, and changes of mitochondrial membrane permeability. Hypoxia-induced activation of Kupffer cells results in generation of reactive oxygen species (ROS). These processes lead to activation of inflammation and immune responses that involve multiple cells and signaling molecules and result in increased level of apoptosis and necrosis. Generation of ROS is one of the major risk factors in the hepatic ischemia-reperfusion injury. A number of methods aimed to reduce the oxidative stress have been investigated, and some of them have been applied clinically. The methods mainly rely on the activation of pro-survival genes and associated mechanisms capable of reducing the level of ROS and inflammation at pre-treatment and post-conditioning stages. Potential benefits of these clinical approaches have been discussed here.
                Bookmark

                Author and article information

                Journal
                Arq Bras Cir Dig
                Arq Bras Cir Dig
                abcd
                Arquivos Brasileiros de Cirurgia Digestiva : ABCD
                Colégio Brasileiro de Cirurgia Digestiva
                0102-6720
                2317-6326
                Oct-Dec 2017
                Oct-Dec 2017
                : 30
                : 4
                : 239-243
                Affiliations
                [1 ]Clinical Hospital Complex, Hepatic Transplantation Service
                [2 ]Faculty of Medicine, Federal University of Paraná, Curitiba, PR, Brazil
                Author notes
                Correspondence: Alexandre Coutinho Teixeira de Freitas E-mail: alexandrefreitas@ufpr.br; jorgemilsted@ 123456outlook.com

                Conflict of interest: none

                Article
                10.1590/0102-6720201700040003
                5793139
                29340545
                d49c5a4d-62f3-40f5-b774-3c803d1026d9

                This is an open-access article distributed under the terms of the Creative Commons Attribution License

                History
                : 11 May 2017
                : 10 August 2017
                Page count
                Figures: 4, Tables: 6, Equations: 0, References: 23, Pages: 5
                Categories
                Original Article

                liver transplantation,cold ischemia,allografts,transplante de fígado,isquemia fria,aloenxertos

                Comments

                Comment on this article