A device for realizing flow balance control by using a flow balance peristaltic pump

Abstract

The invention relates to a flow balancing peristaltic pump for blood purification, comprising a base, an upper cover, a first pump pipe, a second pump pipe, a pump head, two balance cavities, and diaphragms; the upper cover covering the base is rotationally fitted to the base, a pump head cavity is arranged in the base, the pump head arranged in the vertical direction is placed in the pump head cavity, the upper cover is provided with a pump head cover used for covering the pump head, the first pump pipe and the second pump pipe are placed transversely in the base, both part of the first pump pipe and part of the second pump pipe compress the peripheral side of the pump head, two sides of the pump head are provided with a limiting plate for limiting the movement of the first and second pump pipes, each balance cavity is internally provided with one diaphragm for diving the balance cavity into a first cavity and a second cavity, the first pump pipe is communicated with the corresponding first cavity, the second pump pipe is communicated with the corresponding second cavity, and the two balance cavities are positioned on two sides of the pump head. The flow balancing peristaltic pump has flow balancing function and belongs to the technical field of blood purification.

Description

technical field [0001] The invention relates to the technical field of blood purification, in particular to a flow balance peristaltic pump for blood purification. Background technique [0002] Blood purification techniques include hemodialysis, filtration, adsorption, and plasma exchange, among which hemodialysis is the most common. An important task of blood purification is the precise removal of excess water from the patient's body, known as ultrafiltration. Technically, the realization of ultrafiltration is accomplished by controlling the flow of two channels of liquid, and the control of the two channels of flow is realized in two parts, that is, the structure of "balance system + ultrafiltration pump". The invention patent of application number 200610054252.8 records a volume balance and ultrafiltration device for blood purification; the invention patent of application number 201210403479.4 records a balance pump, and the invention patent of application number 2012104...

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Problems solved by technology

The invention patent of application number 200610054252.8 records a volume balance and ultrafiltration device for blood purification; the invention patent of application number 201210403479.4 records a balance pump, and the invention patent of application number 201210403480.7 records a continuous flow balance device; The characteristics are: 1. It is installed in the waterway structure inside the complex hemodialysis equipment; 2. It requires huge and complicated mechanical and electrical components; 3. It is only suitable for flowing through the dialysate but not human blood; 4. The pipeline is not Disposable, need to be disinfected and cleaned after each use

[0003] The pump body suitable for flowing through human blood, simple in structure, and disposable, the most common is the roller (or roller) peristaltic pump, which is used in almost all blood purification equipment, but the function of these peristaltic pumps is only to provide Power, but cannot achieve flow balance, all kinds of continuous blood purification equipment (CRRT) only use ordinary peristaltic pumps, and its liquid balance control can only be realized through electronic scales or metering bags, electronic scales take up a lot of space, use demanding

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