• J. Thorac. Cardiovasc. Surg. · Mar 2022

    Observational Study

    Determinants of hospital variability in perioperative red blood cell transfusions during coronary artery bypass graft surgery.

    • David C Fitzgerald, Annie N Simpson, Robert A Baker, Xiaoting Wu, Min Zhang, Michael P Thompson, Gaetano Paone, Alphonse Delucia, Donald S Likosky, and PERForm Registry and the Michigan Society of Thoracic and Cardiovascular Surgeons Quality Collaborative.
    • College of Health Professions, Medical University of South Carolina, Charleston, SC. Electronic address: fitzgerd@musc.edu.
    • J. Thorac. Cardiovasc. Surg. 2022 Mar 1; 163 (3): 10151024.e11015-1024.e1.

    ObjectiveTo identify to what extent distinguishing patient and procedural characteristics can explain center-level transfusion variation during coronary artery bypass grafting surgery.MethodsObservational cohort study using the Perfusion Measures and Outcomes Registry from 43 adult cardiac surgical programs from July 1, 2011, to July 1, 2017. Iterative multilevel logistic regression models were constructed using patient demographic characteristics, preoperative risk factors, and intraoperative conservation strategies to progressively explain center-level transfusion variation.ResultsOf the 22,272 adult patients undergoing isolated coronary artery bypass surgery using cardiopulmonary bypass, 7241 (32.5%) received at least 1 U allogeneic red blood cells (range, 10.9%-59.9%). When compared with patients who were not transfused, patients who received at least 1 U red blood cells were older (68 vs 64 years; P < .001), were women (41.5% vs 15.9%; P < .001), and had a lower body surface area (1.93 m2 vs 2.07 m2; P < .001), respectively. Among the models explaining center-level transfusion variability, the intraclass correlation coefficients were 0.07 for model 1 (random intercepts), 0.12 for model 2 (patient factors), 0.14 for model 3 (intraoperative factors), and 0.11 for model 4 (combined). The coefficient of variation for center-level transfusion rates were 0.31, 0.29, 0.40, and 0.30 for models 1 through 4, respectively. The majority of center-level variation could not be explained through models containing both patient and intraoperative factors.ConclusionsThe results suggest that variation in center-level red blood cells transfusion cannot be explained by patient and procedural factors alone. Investigating organizational culture and programmatic infrastructure may be necessary to better understand variation in transfusion practices.Copyright © 2020 The American Association for Thoracic Surgery. Published by Elsevier Inc. All rights reserved.

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