Blood Purification Device
AssigneeNipro Corporation
InventorsMitsutaka Ueda, Yoshiyuki Matsumoto, Shogo Okada, Hiroomi Nakano
Life of this patent
Estimating the term…
Abstract
In a blood purification device containing a blood purifier, a blood circuit, a blood pump, and a dialysate line having a fresh dialysate supply line and a used dialysate discharge line, a pair of plunger pumps are disposed in the dialysate line. The pair of plunger pumps are synchronized so that delivery of a fresh dialysate from one plunger pump and suction of a used dialysate into the other plunger pump simultaneously occur and the stroke of at least one of the pair of plunger pumps is made variable.
Claims23
A blood purification device comprising:
- a blood purifier;
- a blood circuit;
- a blood pump;
- and
- a dialysate line having a fresh dialysate supply line and a used dialysate discharge line, wherein:
- a pair of plunger pumps are disposed in the dialysate line,
- the pair of plunger pumps are synchronized so that delivery of a fresh dialysate from one plunger pump and suction of a used dialysate into the other plunger pump simultaneously occur, and
- a stroke of at least one of the pair of plunger pumps is made variable.
A blood purification device comprising:
- a blood purifier;
- a blood circuit connected to the blood purifier;
- a blood pump for generating blood flow in the blood circuit;
- a dialysate line having a fresh dialysate supply line and a used dialysate discharge line individually connected to the blood purifier;
- and
- plunger pumps individually provided in the fresh dialysate supply line and the used dialysate discharge line so as to form one pair, wherein
- the plunger pump provided in the fresh dialysate supply line and the plunger pump provided in the used dialysate discharge line are synchronized so that delivery of a fresh dialysate by the plunger pump provided in the fresh dialysate supply line and suction of a used dialysate by the plunger pump provided in the used dialysate discharge line are simultaneously performed.
A method for passing a dialysate to a blood purifier using a first plunger pump and a second plunger pump individually provided in a fresh dialysate supply line and a used dialysate discharge line individually connected to the blood purifier, the method comprising:
- a delivery step of delivering a fresh dialysate to the blood purifier through the fresh dialysate supply line by transmitting rotary drive to the first plunger pump from the synchronization motor;
- and
- a suction step of sucking a used dialysate from the blood purifier through the used dialysate discharge line by transmitting rotary drive to the second plunger pump from the synchronization motor, wherein
- the delivery step and the step are simultaneously performed in a synchronized manner.
A blood purification device comprising:
- a blood purifier;
- a blood circuit connected to the blood purifier;
- a blood pump for generating blood flow in the blood circuit;
- a dialysate line having a fresh dialysate supply line and a used dialysate discharge line which are individually connected to the blood purifier so as to be at least partially in parallel to each other;
- and
- a pair of plunger pumps provided in each of the parallel fresh dialysate supply lines and the parallel used dialysate discharge lines, wherein
- the pair of plunger pumps individually provided in the parallel fresh dialysate supply lines alternately and continuously perform delivery of a fresh dialysate by one plunger pump of the pair of plunger pumps and delivery of a fresh dialysate by the other plunger pump,
- the pair of plunger pumps provided in the parallel used dialysate discharge lines alternately and continuously perform suction of a used dialysate by one plunger pump of the pair of plunger pumps and suction of a used dialysate by the other plunger pump, and
- the pair of plunger pumps provided in the fresh dialysate supply line and the pair of plunger pumps provided in the used dialysate discharge line are synchronized so that delivery of a fresh dialysate by the pair of plunger pumps provided in the fresh dialysate supply line and suction of a used dialysate by the pair of plunger pumps provided in the used dialysate discharge line are simultaneously performed.
Dependencies are inferred from the claim text.