Automatic blood returning device

Abstract

An automatic reinfusing system which is free from stain and medical mistake when blood is reinfused to a patient after the end of a hemodialysis, and is easy and simple to operate so as not to put burden on medical people. The automatic reinfusing system comprises a hemodialysis circuit, characterized in that a solution replenishing line has a replenishing solution supply source and a means for opening / closing the solution replenishing line, a dialysate supply line and a solution discharge line for perfusing to a dialyzer are provided, the above dialysate supply line and the solution discharge line respectively have solution feeding means, at least one filtering / reverse filtering third solution feeding means capable of rotating forwardly and reversely and being controlled in flow rate so as to effect filtering and reverse filtering and water slowing / solution discharging means are provided on either the dialysate supply line or the solution discharge line in parallel to the solution feeding means, and the blood feeding means and the filtering / reverse filtering third solution feeding means are allowed to communicate by an interlocking control means for controlling by interlocking a means for opening / closing the blood feeding means, the solution feeding means and the solution replenishing line, and an opening means between an artery connection end and a solution replenishing line branching part.

Description

technical field [0001] The present invention relates to a hemodialysis device capable of automating as much as possible a series of operations such as hemodialysis, which has been performed manually, and blood recovery (blood return) related to it, which can save manpower and prevent misoperation. In particular it relates to automatic blood return devices. Background technique [0002] The hemodialysis machine is a medical device for purifying the blood of patients with renal insufficiency and drug poisoning. The mechanism of hemodialysis therapy generally consists of three elements: a hemodialyzer (dialyzer), a blood circuit for blood circulation, and a dialysate supply system. By using two puncture needles (in the case of a single needle, one puncture needle) and a blood circuit directly connected to the blood vessel, the extracorporeal circulation is maintained, and at the same time, the blood flows into the hemodialyzer connected in the middle of the blood circuit In t...

AI Technical Summary

Problems solved by technology

In addition, even if the air remaining in the height difference part and the cavity in the circuit is free, there is still the risk of air mixing

In addition, in the step of withdrawing the puncture needle on the artery side and injecting physiological saline from the arterial side circuit end, there was a mistake in pulling out the needle first by mistakenly taking out the vein side.

[0005] As a result, the mental burden is imposed on the medical staff, and a lot of time is spent in the blood return operation.

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