In-vitro minimally invasive bionic circulation assistance system and control method thereof

Abstract

The invention provides an in-vitro minimally invasive bionic circulation assistance system and a control method thereof, and relates to the field of heart assistance circulation. The system comprises an artificial heart ventricle and an artificial atrium, the artificial atrium is connected with a blood inlet tube, the blood inlet tube is provided with a one-way valve, the artificial heart ventricle is connected with the artificial atrium through an artificial atrioventricular valve and connected with a blood outlet tube through an artificial aortic valve, and the outer wall of the artificial ventricle and the outer wall of the artificial atrium are provided with a first diastolic and systolic device and a second diastolic and systolic device respectively. By arranging the diastolic and systolic devices on the outer wall of the artificial ventricle and the outer wall of the artificial atrium respectively, the artificial ventricle and the artificial atrium are diastolic and systolic or systolic and diastolic simultaneously, switching is quickly completed in a short time through the mechanical acting force, and then a real heart circulation system is simulated; the defect that the states of hydraulic driving are switched slowly is overcome.

Description

technical field [0001] The invention relates to the field of cardiac assisted circulation, in particular to an extracorporeal assisted circulatory system and a control method thereof. Background technique [0002] With the rapid development of cardiac surgery, the number of open-heart surgeries has increased rapidly, and the number of patients with severe heart disease has also increased in proportion. According to statistics, about 1% of patients after open-heart surgery have severe low cardiac output syndrome, and despite the use of various vasoactive drugs and intra-aortic balloon pump (Intra-Aortic Balloon Pump, IABP), they still cannot get out of cardiopulmonary bypass , A mechanical assist device is needed to assist the heart in order to withdraw from extracorporeal circulation and promote the recovery of myocardial function. When acute myocardial infarction is complicated by cardiogenic shock, the mortality rate is still as high as 60%-80% even if drugs or even IABP ...

AI Technical Summary

Problems solved by technology

[0003] Chinese Patent Publication No. CN200810204114.2 discloses a pulsating double-sac cardiac assisted circulation device, which hydraulically causes the two blood sacs to contract and relax each other to achieve blood circulation. Since the heartbeat of a normal adult is 60-100 times per minute Left and right, the hydraulic method is difficult to switch in such a short period of time; the shape of the double-vesicle structure is different from the shape of the real heart, and it is difficult to ensure the same blood flow through each contraction and relaxation even if the volume changes are the same; medical personnel through the interactive interface Operation, setting different compression volumes, compression ratios and pulse volumes of the blood pump for different patients, this method cannot achieve synchronous circulation with the patient, so it cannot simulate real heart function

At present, the extracorporeal membrane lung clinical application device can replace the cardiac assisted circulation, but the device is non-pulsating and does not match the rhythmic pulsation of the heart vessels, which violates the physiological characteristics of the human body itself

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