Medical diaphragm type pneumatic blood pump

Abstract

A medical diaphragm type pneumatic blood pump is composed of two parts including a pump head and an actuator. An air inlet-outlet port of an air chamber of the pump head is connected with the output end of a tee joint reversing rapid electropneumatic valve, one end of the electropneumatic valve is in input connection with the output end of a long-life air feed pump and a variable pressure air valve for supplying air and provided with an air cavity, the other end of the electropneumatic valve is in input connection with the output end of a long-life aspirator pump and a variable pressure air valve for exhausting the air and provided with an air cavity, the long-life air feed pump is connected with an air feed pump actuator module, and the long-life aspirator pump is connected with an aspirator pump actuator module. A control coil of the electropneumatic valve is connected with a regulating and control circuit which is connected with the air feed pump actuator module and the aspirator pump actuator module. The medical diaphragm type pneumatic blood pump is used in extracorporeal circulation in a cordiovascular surgery operation stage, all technical parameters meet requirements, parameter accuracy requirements, hemoglobin indexes, microcirculation effects, pre-charging quantity and the like are all superior to those of a rolling blood pump and a centrifugal pump, and the medical diaphragm type pneumatic blood pump can replace the two blood pumps to conduct high-grade and everlasting pouring circular flow.

Description

technical field [0001] The invention belongs to medical equipment, and relates to a perfusion blood pump for medical extracorporeal circulation equipment. Particularly relating to a medical diaphragm type pneumatic blood pump Background technique [0002] Medical extracorporeal circulation technology originated from the need of open-sight cardiac surgery, established and continuously improved and perfected. Because of its superior special functions, it has been applied in many other medical subjects. For example, cardiopulmonary emergency case rescue, cardiac assist system, ECMO, tumor perfusion, organ transplantation and many other applications. [0003] A blood pump is a medical device used to pump blood in medical equipment. Its structure is composed of a pump head (executing the blood pumping part) and a host (control and drive part). In the pump head part, some parts are in contact with blood. , in order to prevent cross-infection, it must be a one-time use of disposa...

AI Technical Summary

Problems solved by technology

[0008] Disadvantages of the rolling pump: 1. The damage to the blood cells is relatively large, so it can only be used for short-time cycle surgery of perfusion cycle within 2-3 hours of continuous operation

2. Large amount of priming during operation (disadvantages in medical technique)

Second, because the way of pumping blood is to rotate blood and high-speed toss and press blood, etc., which will cause damage to blood cells such as high-speed friction and heat

[0011] Disadvantages of centrifugal pumps: 1. Perfusion advection blood flow is non-bionic, and long-term circulating blood flow cannot promote the opening of microcirculation

[0012] 2. In a short period of time, the stability of perfusion with high requirements for constant blood flow is not as good as that of roller pumps

[0013] 3. When long-term perfusion support is really required, because there is also some damage to blood cells, it cannot be competent when it exceeds 2-3 weeks

4. The entire pump head part is a disposable product, and the cost of using it once is relatively high

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