Hemodiafiltration device capable of automatically adjusting of rate of displacement liquid and hemodiafiltration control mechanism of hemodiafiltration device

Abstract

The invention discloses a hemodiafiltration device capable of automatically adjusting of rate of displacement liquid. The hemodiafiltration device capable of automatically adjusting of rate of displacement liquid comprises a fluid infusion outlet, a fluid infusion pump, an artery kettle, a blood pump and a control device; the blood pump is connected to the artery kettle; the fluid infusion outlet is selectively connected to the artery kettle or a vein kettle, and when the fluid infusion outlet is connected to the artery kettle through the fluid infusion pump, front fluid infusion is connected on the artery kettle; when the fluid infusion outlet is connected to the vein kettle through the fluid infusion pump, rear fluid infusion is conducted on the vein kettle; the control device is used for adjusting the rotating speed of the fluid infusion pump according to an actual blood flow volume, a hematocrit value and the total protein level of a patient so as to control the flow speed of the rear fluid infusion towards the vein kettle.

Description

Technical field [0001] The invention relates to the technical field of dialysis equipment, in particular to a hemodiafiltration device capable of automatically adjusting the rate of replacement fluid. Background technique [0002] Hemodiafiltration (HDF) is a comprehensive treatment that combines hemodialysis (HD) and hemofiltration (HF). On the basis of hemofiltration treatment, the hemodiafiltration device can also drain blood from the body to the body through a dialyzer composed of hollow fibers, where the blood and the electrolyte solution (dialysis fluid) with similar body concentration The hollow fibers inside and outside the roots exchange materials through diffusion / convection to remove metabolic waste from the body, maintain electrolyte and acid-base balance, and remove excess water in the body. [0003] On-line hemodiafiltration combines the advantages of both hemodialysis and hemofiltration, which can replenish more replacement fluid and has the advantage of better remo...

AI Technical Summary

Problems solved by technology

[0004] However, in clinical operations, due to the influence of the dialyzer model, the hypercoagulable state of the patient, and the blood flow velocity of the vascular access, it is difficult to add a large amount of replacement fluid during the treatment, especially in the late treatment period, the blood caused by dehydration Concentration is severe, and the secondary protein film covering the surface of the dialysis membrane increases the transmembrane pressure of the dialyzer, which is very prone to machine alarms, and often needs to reduce the volume of replacement fluid in clinical practice to ensure normal treatment.

[0005] Due to the existence of these reasons, the blood flow rate of the replacement fluid flow rate ≤ 25-30% is often selected clinically as a parameter, but this value is too small to maximize the effect of hemodiafiltration within a safe range

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