Mortality risk is dose-dependent on the number of packed red blood cell transfused after coronary artery bypass graft

Abstract

IntroductionTransfusions of one or more packed red blood cells is a widely strategy used in cardiac surgery, even after several evidences of increased morbidity and mortality. The world's blood shortage is also already evident. ObjectiveTo assess whether the risk of mortality is dose-de>pendent on the number of packed red blood cells transfused after coronary artery bypass graft. MethodsBetween June 2009 and July 2010, were analyzed 3010 patients: transfused and non-transfused. Transfused patients were divided into six groups according to the number of packed red blood cells received: one, two, three, four, five, six or more units, then we assess the mortality risk in each group after a year of coronary artery bypass graft. To calculate the odds ratio was used the multivariate logistic regression model. ResultsThe increasing number of allogeneic packed red blood cells transfused results in an increasing risk of mortality, highlighting a dose-dependent relation. The odds ratio values increase with the increased number of packed red blood cells transfused. The death's gross odds ratio was 1.42 (P=0.165), 1.94 (P=0.005), 4.17; 4.22, 8.70, 33.33 (P<0.001) and the adjusted death's odds ratio was 1.22 (P=0.43), 1.52 (P=0.08); 2.85; 2.86; 4.91 and 17.61 (P<0.001), as they received one, two, three, four, five, six or more packed red blood cells, respectively. ConclusionThe mortality risk is directly proportional to the number of packed red blood cells transfused in coronary artery bypass graft. The greater the amount of allogeneic blood transfused the greater the risk of mortality. The current transfusion practice needs to be reevaluated.

The contribution of red blood cell transfusion to neonatal morbidity and mortality

“…Transfusion exposure increases the risk of death in critically ill adult patients, with the risk of both short‐ and long‐term mortality increasing with total number of transfusions received . Despite preterm newborns representing one of the most heavily transfused patient groups, neonatal data linking transfusion exposure and increased mortality are limited.…”

The Negative Influence and Adverse Outcome of Blood Transfusion in Heart Surgery Patients

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Cardiopulmonary bypass duration as predictor of immediate results after cardiac surgery

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