PMID: 11333796May 3, 2001Paper

Autotransfusion after cardiac surgery. Hematological, biochemical and immunological properties of shed mediastinal blood

Revista española de anestesiología y reanimación
J Salas MillánM Muñoz Gómez

Abstract

Although it is well documented that the reinfusion of unwashed shed blood reduces postoperative homologous blood requirements after cardiac surgery, the efficacy and safety of the technique has been questioned on the basis of several possible adverse effects. We therefore aimed to evaluate the extent of mediastinal shed blood damage by cardiopulmonary bypass (CPB) and extravasation. Five perioperative blood samples were obtained from each of the 20 patients undergoing cardiac surgery: by venipuncture, during the induction of anesthesia (sample 1), at the end of CPB (sample 2), and one hour after mediastinal shed blood reinfusion (sample 5), and from the cardiotomy reservoir at the first and sixth postoperative hours (samples 3 and 4). Hematological, biochemical and immunological parameters, and the metabolic and functional status of shed erythrocytes were studied in each sample. Hematological and biochemical values were lower at the end of CPB and in shed blood, but not after reinfusion. Inversely, plasma free hemoglobin levels and echinocyte formation were elevated after CPB and in shed blood, the latter correlating with the decrease in serum albumin levels due to hemodilution. No alterations were detected in erythrocyte media...Continue Reading

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