To the Editor: Dr Bennett-Guerrero and colleagues1 observed a marked variation among hospitals in the use of blood transfusion following coronary artery bypass graft (CABG) surgery. The authors considered inconsistency in transfusion practices as a possible explanation for these differences. However, another important factor may have been variation in the extent of bleeding.
Dixon B, Santamaria JD. Blood Transfusion After Coronary Artery Bypass Graft Surgery. JAMA. 2011;305(2):149-150. doi:10.1001/jama.2010.1956