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The association of perioperative red blood cell transfusions and decreased long-term survival after cardiac surgery – Source: Anesthesia and Analgesia, Jun 2009

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By Stephen D. Surgenor, MD, et al. • www.ProHealth.com • July 11, 2009


Background: Exposure to red blood cell (RBC) transfusions has been associated with increased mortality after cardiac surgery. We examined long-term survival for cardiac surgical patients who received one or two RBC units during index hospitalization.

Methods: 9,079 consecutive patients undergoing coronary artery bypass graft, valve, or coronary artery bypass graft/valve surgery at eight centers in northern New England during 2001-2004 were examined after exclusions. A probabilistic match between the regional registry and the Social Security Administration's Death Master File determined mortality through June 30, 2006. Cox Proportional Hazard and propensity methods were used to calculate adjusted hazard ratios.

Results: 36% of patients (n = 3,254) were exposed to one or two RBC units. 43% of RBCs were given intraoperatively, 56% in the postoperative period and 1% were preoperative. Patients transfused were more likely to be anemic, older, smaller, female and with more comorbid illness.

Survival was significantly decreased for all patients exposed to 1 or 2 U of RBCs during hospitalization for cardiac surgery compared with those who received none (P < 0.001).

After adjustment for patient and disease characteristics, patients exposed to 1 or 2 U of RBCs had a 16% higher long-term mortality risk (adjusted hazard ratios = 1.16, 95% CI: 1.01-1.34, P = 0.035).

Conclusions: Exposure to 1 or 2 units of red blood cells was associated with a 16% increased hazard of decreased survival after cardiac surgery.

Source: Anesthesia and Analgesia, Jun 2009;108(6):1741-6. PMID: 19448195, by Surgenor SD, Kramer RS, Olmstead EM, Ross CS, Sellke FW, Likosky DS, Marrin CA, Helm RE Jr, Leavitt BJ, Morton JR, Charlesworth DC, Clough RA, Hernandez F, Frumiento C, Benak A, DioData C, O'Connor GT; Northern New England Cardiovascular Disease Study Group. Dartmouth-Hitchcock Medical Center, Department of surgery, Lebanon, New Hampshire, USA. [E-mail: Stephen.D.Surgenor@Hitchcock]





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