A total of 14,259 patients (2006-2010) undergoing nonemergency, primary, isolated coronary artery bypass grafting operations at 17 different statewide cardiac centers were stratified according to transfusion guideline era: pre-guideline (n?=?7059, age?=?63.7 ¡À 10.6 years) versus post-guideline (n?=?7200, age?=?63.7 ¡À 10.5 years). Primary outcomes of interest were observed differences in postoperative events and mortality risk-adjusted associations as estimated by multiple regression analysis.
Overall intraoperative (24 % vs 18 % , P?<?.001) and postoperative (39 % vs 33 % , P?<?.001) blood product transfusion were significantly reduced in the post-guideline era. Patients in the post-guideline era demonstrated reduced morbidity with decreased pneumonia (P?=?.01), prolonged ventilation (P?=?.05), renal failure (P?=?.03), new-onset hemodialysis (P?=?.004), and composite incidence of major complications (P?=?.001). Operative mortality (1.0 % vs 1.8 % , P?<?.001) and postoperative ventilation time (22 vs 26 hours, P?<?.001) were similarly reduced in the post-guideline era. Of note, after mortality risk adjustment, operations performed in the post-guideline era were associated with a 47 % reduction in the odds of death (adjusted odds ratio, 0.57; P?<?.001), whereas the risk of major complications and mortality were significantly increased after intraoperative (adjusted odds ratio, 1.86 and 1.25; both P?<?.001) and postoperative (adjusted odds ratio, 4.61 and 4.50, both P?<?.001) transfusion. Intraoperative and postoperative transfusions were associated with increased adjusted incremental total hospitalization costs ($4408 and $10,479, respectively).
Implementation of a blood use initiative significantly improves postoperative morbidity, mortality, and resource utilization. Limiting intraoperative and postoperative blood product transfusion decreases adverse postoperative events and reduces health care costs. Blood conservation efforts are bolstered by collaboration and guideline development.