Abstract
A wide range of experience, dating back as far as 1978, has been gained with both the hard-shell cardiotomy reservoir of the heart-lung machine and the Sorensen autotransfusion system as retransfusion systems. Three remains, however, a lack of knowledge regarding the quality of retransfused blood in systems of less complex construction which are already available on the market and involve the use of a pouch (Sentinel-Seal autotransfusion system and Pleur-evac collecting system). The present study entailed the investigation of blood from the chest drainages of twenty patients after cardiac surgery by using a simple retransfusion system (Sentinel-Seal autotransfusion system). In two postoperative groups of patients with low and high blood loss from chest drainage, we determined, in addition to free plasma hemoglobin, the following: factor XII, kallikrein-like activity, thrombin-antithrombin III complex, tissue-plasminogen and d-dimers. In the collective with a low blood loss, we found remarkable cell alterations as well as highly activated and advanced coagulation and an extraordinary fibrinolytic activity. If done at all, retransfusion by the Sentinel-Seal autotransfusion system should be restricted to the first four postoperative hours in cases of high blood loss.
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