Flow rate calibration device of fluid replacement pump in hemodialysis system
A technology of hemodialysis and calibration equipment, which is applied in the field of infusion pumps, and can solve the problems of increased cleaning labor and increased costs
Pending Publication Date: 2020-05-29
SHIBUYA IND CO LTD
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- Description
- Claims
- Application Information
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Problems solved by technology
[0010] In Patent Document 2, since the delivery amount of the replenishment pump is directly detected by using a dedicated metering container, the accurate amount of replenishment liquid can be grasped, but there are following disadvantages: the cost increases corresponding to the use of the metering container, and , the cleaning labor increases
Method used
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Embodiment Construction
[0035] Hereinafter, if the present invention is described with respect to the illustrated embodiment, then in figure 1 Among them, a hemodialysis apparatus 1 for performing hemodialysis includes a dialyzer 2 for performing hemodialysis, a blood circuit 3 connected to the dialyzer 2 , and a dialysate circuit 4 connected to the dialyzer 2 .
[0036] The hemodialysis apparatus 1 of this embodiment is capable of performing on-line HDF and HF for supplying fresh dialysate to a patient via the blood circuit 3 , and includes a fluid replacement channel 6 branching from the blood circuit 3 and connected to the dialysate circuit 4 .
[0037] The blood circuit 3 is provided with an arterial side passage 11 connected to the patient's artery and connected to one end of the dialyzer 2, and a vein side passage 12 connected to the vein and connected to the other end of the dialyzer 2. In an example, the liquid replacement channel 6 is connected so as to branch from the arterial side channel ...
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A flow rate calibration device of a fluid replacement pump in a hemodialysis system. A controller executes a first operation of operating a dialysate pump at a predetermined set flow rate, to obtain total discharge time until dialysate supplied to fill a supply chamber of a dialysate chamber runs out. Next, the controller executes a second operation of operating a fluid replacement pump at a predetermined set flow rate only for predetermined time, to discharge a part of the dialysate supplied to fill the supply chamber, and next executes a third operation of operating the dialysate pump at thesame set flow rate as in the first operation again, to obtain remaining discharge time until residual dialysate remaining in the supply chamber runs out after the end of the second operation. A substantial flow rate of the fluid replacement pump can be calculated from the total discharge time and the remaining discharge time, and hence in a calibrating operation of the fluid replacement pump, thecontroller adjusts setting of the fluid replacement pump to eliminate a difference between the set flow rate and the substantial flow rate in the fluid replacement pump. The flow rate of the fluid replacement pump can be calibrated without adding any special configuration.
Description
technical field [0001] The present invention relates to a fluid replacement pump used in a hemodialysis device, and more specifically, to a flow rate correction device for correcting the flow rate of the fluid replacement pump. Background technique [0002] Conventionally, as a hemodialysis device, a hemodialysis device equipped with a fluid replacement pump is known (Patent Document 1, Patent Document 2). [0003] The hemodialysis apparatus described in Patent Document 1 includes: a dialysate chamber that is divided into a supply chamber and a recovery chamber by a diaphragm; a dialysate supply channel that connects the supply chamber to a dialyzer; and a dialysate recovery chamber. Channel, the dialysate recovery channel connects the dialyzer to the recovery chamber; dialysate pump, the dialysate pump is set in the dialysate recovery channel; blood circuit, the blood circuit is connected to the dialyzer; fluid replacement channel, the fluid replacement channel It is conne...
Claims
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Login to View More IPC IPC(8): A61M1/16A61M1/36
CPCA61M1/1601A61M1/1647A61M1/3672A61M1/3621A61M2205/3334A61M2205/70A61M1/342A61M1/1639
Inventor 竹村秀夫
Owner SHIBUYA IND CO LTD