Patent ID: 11951295
Assignee: GAMBRO LUNDIA AB
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. An apparatus for continuous renal replacement therapy comprising:
a blood circuit comprising a blood removal line, a treatment unit, and a blood return line, the blood treatment unit comprising a semipermeable membrane, a first chamber, and a second chamber, the semipermeable membrane being configured for separating the first chamber from the second chamber, the blood removal line having a first end destined to be connected to a vascular system of a subject and a second end connected to an inlet port of the first chamber, the blood return line having a first end connected to an outlet port of the first chamber and a second end destined to be connected to the vascular system;
a replacement fluid container configured for containing a medical fluid;
an infusion line having a first end connected to the replacement fluid container and a second end connected to the blood circuit;
a blood pump active on the blood circuit;
a replacement fluid pump active on the pre-infusion line;
a second pre-infusion line;
a pre-blood pump (PBP) connected to the control unit and active on the second pre-infusion line;
a PBP fluid container configured for containing a second medical fluid; wherein the second pre-infusion line has a first end connected to the PBP fluid container and a second end connected to the blood removal line, the second end of the second pre-infusion line being connected to the blood removal line downstream from the first end of the blood removal line and upstream from the blood pump;
a control unit connected to the replacement fluid pump and to the blood pump and configured to operate one or both of the replacement fluid pump and the blood pump to perform a rinse-back procedure for restitution of blood to a patient at an end of treatment, the rinse-back procedure comprising conveying blood contained in the blood circuit towards the second end of the blood return line using the medical fluid;
wherein the rinse-back procedure further comprises:
controlling the blood pump and the PBP to convey fluid from the PBP fluid container towards the treatment unit; and
controlling the blood pump and the PBP to stop conveying fluid when a first predetermined amount of fluid has been conveyed.