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US 10,307,523 B2Granted
Blood purification device
AssigneeNipro Corporation
InventorsMitsutaka Ueda, Tomoyuki 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.
Claims15
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,
- a stroke of at least one of the pair of plunger pumps is variable, and
- the pair of plunger pumps are disposed in a mirror-target manner with respect to a rotation shaft of a synchronization motor and are individually connected to the synchronization motor located in a central portion of the rotation shaft through drive joints.
6 more elements
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 synchronization motor;
- drive joints which rotate by driving force given from the synchronization motor;
- a dialysate line having a fresh dialysate supply line and a used dialysate discharge line each connected to the blood purifier;
- and
- plunger pumps provided, respectively, 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, and
- the pair of plunger pumps are disposed in a mirrored, symmetrical manner with respect to a plane orthogonal to a rotation shaft of the synchronization motor and are connected to the synchronization motor by the drive joints.
7 more elements
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 synchronization motor;
- drive joints which rotate by driving force given from the synchronization motor;
- a dialysate line having a fresh dialysate supply line and a used dialysate discharge line each connected to the blood purifier;
- and
- plunger pumps provided, respectively, 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 stroke of at least one of the plunger pumps individually provided in the fresh dialysate supply line and the used dialysate discharge line is variable,
- a stroke of the plunger pump provided in the used dialysate discharge line is variable, and
- a rotation radius of the drive joint on a used dialysate suction side is larger than a rotation radius of a drive joint on a fresh dialysate delivery side.
9 more elements
A method for passing a dialysate to a blood purifier using a first plunger pump and a second plunger pump, respectively provided in a fresh dialysate supply line and a used dialysate discharge line, each of the fresh dialysate supply line and the used dialysate discharge line 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 a synchronization motor, wherein
- the delivery step and the step are simultaneously performed in a synchronized manner.
1 more element
A blood purification device comprising:
- a blood purifier;
- a blood circuit connected to the blood purifier;
- a synchronization motor;
- a first drive joint which rotates by driving force given from the synchronization motor;
- a blood pump for generating blood flow in the blood circuit;
- a dialysate line having (i) a fresh dialysate supply line coupled to a fresh dialysate tank and to the blood purifier, and (ii) a used dialysate discharge line coupled to a waste dialysate tank and to the blood purifier, each of the fresh dialysate supply line and the used dialysate discharge line divided into a respective pair of parallel lines for a respective length;
- and
- a first pair of plunger pumps provided, respectively, in each of the parallel fresh dialysate supply lines, and a second pair of plunger pumps provided, respectively, in each of the parallel used dialysate discharge lines, wherein:
- the first pair of plunger pumps alternately and continuously perform delivery of a fresh dialysate by one plunger pump of the first pair of plunger pumps and delivery of a fresh dialysate by the other plunger pump of the first pair of plunger pumps,
- the second pair of plunger pumps alternately and continuously perform suction of a used dialysate by one plunger pump of the second pair of plunger pumps and suction of a used dialysate by the other plunger pump of the second pair of plunger pumps,
- the first pair of plunger pumps and the second pair of plunger pumps are synchronized so that delivery of a fresh dialysate by the first pair of plunger pumps and suction of a used dialysate by the second pair of plunger pumps are simultaneously performed, and
- the first pair of plunger pumps are disposed in a mirrored, symmetrical manner with respect to a plane orthogonal to a rotation shaft of the synchronization motor and are connected to the synchronization motor by the first drive joint.
9 more elements
Dependencies are inferred from the claim text.