FILTRE ET PROCEDE POUR L'OBTENTION D'ECHANTILLONS DE PLASMA SANGUIN

摘要

The filter is for use during hemodialysis and is of the cross-flow type having a blood flow chamber 45 through which the blood flows and a plasma chamber 46 separated from the blood flow chamber by a filter medium 32 which enables the passage of the plasma therethrough while blocking the passage of the red cells of the blood, the plasma chamber having a volume not exceeding about 2 milliliters. In the preferred use the plasma chamber is filled with saline solution except when a plasma sample is taken at which time the saline solution is first withdrawn and then the plasma sample is withdrawn through a sealable opening 38, after which the plasma chamber is again filled with saline solution whereupon plasma in the plasma chamber flows back through the filter medium into the blood flowing through the flow chamber. The filter and method enable accurate periodic analysis of the patient's blood plasma without any loss of red cells to the patient and with minimal loss of plasma.