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Background: Leukocyte-depleted blood transfusions were introduced to reduce transfusion-Associated immunomodulation, but the clinical effects of different types of leukocyte depletion have been analyzed rarely. The aim of this survey was to analyze the clinical impact of pre-storage leukocyte-depleted blood transfusions (considered as pre-storage or bedside-filtered) on post-operative complications in patients undergoing elective or urgent colorectal resection. Methods: Data were collected retrospectively from the medical records of 437 consecutive patients who underwent colorectal resection from 2005 to 2010. All patients requiring transfusion received pre-storage or bedside-filtered leukocyte-depleted red blood cell concentrates according to availability at the blood bank. The outcomes were measured by the analysis of post-operative morbidity in patients receiving the different types of transfusions or having other potentially predictive risk factors. Results: The overall morbidity rate, infective morbidity rate, and non-infective morbidity rate were, respectively, 35.6%, 28.1%, and 21.0%. Two hundred five patients (46.9%) received peri-operative transfusions. On multivariable analysis, leukocyte-depleted transfusion (odds ratio [OR] 3.33; 95% confidence interval [CI] 2.14-5.20; p<0.001) and both pre-storage (OR 2.82; 95% CI 1.73-4.59; p<0.001) and bedside-filtered (OR 4.69; 95% CI 2.54-8.67; p<0.001) transfusions were independent factors for post-operative morbidity. Prolonged operation (p=0.035), American Society of Anesthesiologists score≥3 points (p=0.023), diagnosis of cancer rather than benign disease (p=0.022), and urgent operation (p=0.020) were other independent predictors of post-operative complications. Patients transfused with bedside-filtered blood showed significantly higher rates of infective complications (51.4% vs. 31.8%; p=0.006), but not non-infectious complications (35.7% vs. 32.6; p=0.654) than patients who received pre-storage transfusions. Conclusions: Leukocyte-depleted blood transfusions and, in particular, bedside-filtered blood have a significant negative effect on infectious complications after colorectal resection. © Copyright 2013, Mary Ann Liebert, Inc. 2013.

Garancini, M., Degrate, L., Carpinelli, M., Maternini, M., Uggeri, F., Giordano, L., et al. (2013). Impact of pre-storage and bedside filtered leukocyte-depleted blood transfusions on infective morbidity after colorectal resection: A single-center analysis of 437 patients. SURGICAL INFECTIONS, 14(4), 374-380 [10.1089/sur.2012.183].

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