[Perioperative risk factors associated with allogeneic blood transfusion in patients with hip fracture surgery]

The aim of this article is to identify risk factors associated with allogeneic blood transfusion (ABT) in patients undergoing hip surgery during 2008-2009, at a General Hospital, in Yucatán, Mexico.

Data of patients who received at least one package of allogeneic blood either before, during, or after hip surgery, (cases, n = 118), was compared against that of patients having the same type of surgery, but not transfused with an ABT (controls, n =138). Logistic regression analysis was carried on in estimating associations. Odd Ratios (OR) and 95 % confidence intervals (95 % CI), were applied when appropriate.

Bleeding grater than or equal to 400 ml during surgery (vs < 400 ml, OR 5.68, 95% CI 2.5-12.9, p = 0.007), and having pre surgical hemoglobin (Hb) concentration < 11 g/dL (vs = 11 g/dL, OR 2.86, 95% CI 1.5-5.6; p = 0.001) were both, associated with ABT. Duration of surgery, the femoral segment involved, the surgical procedure and the postsurgical Hb, were all excluded.

Bleeding grater than or equal to 400 ml during surgery and having pre surgical Hb concentration < 11 g/dL were both, associated with increased risk of receiving an ABT.