Patent ID: 9144639
Filing Date: 2015-09-29
Classification: A61M

Abstract:
1. A dialysis apparatus comprising: a blood treatment unit comprising a dialysate chamber and a blood chamber separated by a semipermeable membrane; a dialysate circuit comprising a supply line and a discharge line connected to said blood treatment unit, respectively, upstream and downstream of said dialysate chamber; a preparation device configured to prepare a dialysate containing a substance which is also present in blood, the preparation device includes a regulator configured to regulate a concentration of the substance in dialysate, said preparation device being connected to said supply line; a blood circuit configured to circulate extracorporeal blood through said blood chamber; a controller configured to determine a value representative of the concentration of said substance in the blood and configured to drive the regulator as a function of the determined value representative of the substance concentration in the blood, wherein the controller causes the preparation device to regulate the concentration of the substance in the dialysate to tend towards at least one of: (i) the determined concentration of the substance in the blood if the determined concentration of the substance in the blood is greater than a minimum threshold, and (ii) the minimum threshold if the determined concentration of the substance in the blood is less than the minimum threshold, and wherein the controller causes the preparation device to regulate the concentration of the substance in the dialysate to tend towards at least one of: (iii) the determined concentration of the substance in the blood if the determined concentration of the substance in the blood is less than a maximum threshold, and (iv) the maximum threshold if the determined concentration of the substance in the blood is greater than the maximum threshold.