[Methods of sampling and preservation of blood used during extracorporeal circulation]

The blood supply of Cardiac Surgery Centers set quantitative and qualitative problems to the Centers of blood dispatch. In this work, from a Lyonese experience on 4,000 E.C.C., authors try to define the best preservative solution, especially for the respiratory function of the red blood cell. The C.P.D. solution (citrate, phosphate, dextrose) answers to requirements in this field when the blood used is less than 48 hours old. In the meantime, it is not impossible that studies based on definite criteriums of evaluation and on severe comparisons allows to adapt new process from which some are described and criticized in this work.