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Flowmeter calibration method for hemodialysis system

A technology of hemodialysis and calibration method, which is applied to dialysis systems, testing/calibrating volume flow, and drug devices, etc., can solve problems such as measurement errors, and achieve the effects of reducing miniaturization and manufacturing costs.

Active Publication Date: 2020-12-11
NIKKISO COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, since high precision is explicitly stipulated, it is technically difficult to output measured values ​​that completely match the volumetric flowmeter installed on the inflow side of the dialysate and the volumetric flowmeter installed on the outflow side of the dialysate, and each measured value may vary. Measurement errors based on individual differences

Method used

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  • Flowmeter calibration method for hemodialysis system
  • Flowmeter calibration method for hemodialysis system
  • Flowmeter calibration method for hemodialysis system

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Embodiment Construction

[0036]

[0037] figure 1 The schematic structure of the hemodialysis system 10 of this embodiment is illustrated. The hemodialysis system 10 is configured to include a hemodialysis device 12 and a blood purifier 14 . Additionally, if figure 1 As shown, when looking at the hemodialysis system 10 from the functional aspect, the system can be divided into a dialysate production unit and an extracorporeal circulation unit.

[0038] The dialysate produced by the dialysate production unit is sent to the extracorporeal circulation unit. Within the extracorporeal circulation unit, the dialysate is sent to a blood purifier 14 . In addition, blood is sent to the blood purifier 14 from another flow path. The dialysate flow path and the blood flow path are separated by a hollow diaphragm 16 as a dialysis membrane, and material exchange between the dialysate and blood is performed through the hollow diaphragm 16 .

[0039] In addition, the discharge volume of the discharge pump 20 p...

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Abstract

The present invention provides a flowmeter calibration method of a hemodialysis system that can be calibrated with high precision even without a reference flowmeter that is not directly related to dialysis treatment. In the state where the liquid can be prevented from flowing out to the blood flow path in the blood purifier (14), the liquid is supplied to the flow path passing through the inflow flowmeter (22) and the outflow flowmeter (24), and the outflow flow rate when the liquid is supplied is Calibration of the inflow flowmeter (22) and the outflow flowmeter (24) is performed by correcting the measured value of the meter (24) to coincide with the measured value of the inflow flowmeter (22).

Description

technical field [0001] The invention relates to a calibration method for a plurality of flowmeters arranged in a hemodialysis system. Background technique [0002] In dialysis treatment, a blood purifier called a dialyzer is used. The dialyzer has a housing containing a bundle of hollow membranes. The casing is respectively provided with: a blood inflow port for introducing the blood that has been prepared and deblooded by shunting to the dialysis patient; a blood outflow port for returning blood to the patient; a port for dialysate inflow / outflow Dialysate inflow / outflow ports; 4 ports in total. [0003] During dialysis treatment, blood is withdrawn (bleeded) outside the body and sent into a dialysis machine. In the dialyzer, blood flows in from the blood inflow port, passes through the hollow diaphragm, flows out from the outflow port, and returns to the body (blood return). In addition, in this way, the dialysate is supplied into the case through the dialysate inflow / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M1/16
CPCA61M1/3663A61M1/1613A61M1/3627A61M1/3643A61M2205/3334A61M2205/3368A61M2205/3389A61M2205/70G01F25/10A61M1/16A61M1/166A61M1/267A61M1/1656
Inventor 增田吉通藤原真人二村寛
Owner NIKKISO COMPANY