Blood dialyzer

Details Blood dialyzer Blood dialyzer

A - Human Necessities

61

M

A61M 1/14 (2006.01)

Patent

CA 2455410

A hemodialysis apparatus that carries out hemodialysis treatment by measuring or calculating the blood volume or its volume change as a blood indication level, and by controlling dialysis conditions according to said target blood indication level, wherein the chronological course of said blood indication level is defined as a target control line, and the primary blood volume (BV0) can be calculated as blood indication level. In the former part of the dialysis operation, the water removal is controlled so that the circulating blood volume in the body approach to the standard blood volume (BV st) with the use of said target control line. After the water removal of the former part of the dialysis operation, when the circulating blood volume in the body attains the standard blood volume (BV st), the latter part of the dialysis operation is started. In said latter part of the dialysis operation, the water removal operation is performed by substantively maintaining said standard blood volume (BV st).

L'invention concerne un dialyseur sanguin dans lequel on dialyse de sang par mesure ou par calcul des volumes ou des échanges sanguins sous forme de valeurs d'indication sanguine, et par commande des conditions de dialyse en fonction de ces valeurs d'indication sanguines. Dans ce dialyseur, on règle l'évolution cible des valeurs d'indication sanguine associées au temps de passage sous forme de ligne de commande cible et on calcule le volume sanguin de départ (BV0) sous forme de valeur d'indication sanguine. Dans une première partie de l'opération de dialyse, on élimine l'eau de sorte que le volume sanguin circulant dans le corps est proche du volume sanguin normalisé (BVst). La seconde partie de la dialyse commence lorsque le volume sanguin circulant dans le corps est égal au volume sanguin normalisé (BVst) obtenu par élimination d'eau dans la première partie de l'opération. Dans le seconde partie de l'opération, on élimine l'eau sous commande de façon à maintenir sensiblement le volume sanguin normalisé (BVst) précité.

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