Hemodialysis System Using Weight Balance for Flow and Ultrafiltration Control

Abstract

The invention discloses a hemodialysis system using weight balance to realize flow and ultrafiltration control. The system comprises a liquid inlet system, a liquid outlet system, two sets of same dialysate weight balance assemblies, an ultrafiltration weight balance control assembly and a dialyzer; each dialysate weight balance assembly comprises a fresh dialysate container, a waste liquid container, a liquid inlet vale, a liquid outlet valve, a liquid level sensor and a weight balance measuring module, and the liquid inlet vale, the liquid outlet valve, the liquid level sensor and the weightbalance measuring module are used for controlling alternative periodic work of the dialysate weight balance assembly; the ultrafiltration weight balance control assembly comprises an ultrafiltrationliquid container, a counter weight, a drain valve, a metering pump and a third weight balance measuring module, and the drain valve, the metering pump and the third weight balance measuring module areused for controlling periodic work of the ultrafiltration weight balance control assembly. According to the hemodialysis system using weight balance to realize flow and ultrafiltration control, weight balance of fresh dialysate and waste liquid is realized in the flow meter and weight balance manner, and the dialysate flow is controlled. The ultrafiltration amount is controlled with a metering pump and weight balance manner, the accuracy is high, and the treatment safety and reliability are improved.

Description

technical field [0001] The invention relates to a hemodialysis system, in particular to a hemodialysis system which adopts weight balance to realize flow and ultrafiltration control. Background technique [0002] The dialysate flow rate of the hemodialysis machine is an important parameter in the dialysis process. If the flow rate is too high, the cost of dialysis will increase, and if the flow rate is too small, it will lead to insufficient dialysis. Therefore, the accuracy of the dialysate flow rate is very important for the dialysis machine. [0003] Ultrafiltration is the core function of the hemodialysis machine. It uses the transmembrane pressure on both sides of the semipermeable membrane of the dialyzer to remove excess water in the patient's blood. At present, the ultrafiltration control system of the hemodialysis machine mainly includes pressure control, flow meter control, capacity control and other methods. Among them, the pressure control is to control the tra...

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Problems solved by technology

There are many parts in this method, and it is prone to failure due to aging of parts.

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