Mobile type numerically controlled hydraulic external heart pressing apparatus

Abstract

A numerally controlled movable external hydraulic heart pressing machine features that three cylinders for respectively controlling the universal wheel, pressing frame and pressing head are driven by an oil pump, the motor of oil pump, commutating electromagnetic valve, the reverse valve of step motor, proportional electromagnetic pressure valve, flow valve and hydraulic system are controlled by the sensed different signals and predefined program, and after the machine is turned on, the heart is automatically and periodically pressed according to default parameters.

Description

Technical field [0001] The invention relates to a medical device, which is used for rescuing patients with sudden cardiac arrest. Background technique [0002] Once the cardiac arrest is diagnosed, it should be rescued immediately, effective artificial respiration should be carried out, and effective artificial blood circulation should be established. After cardiac arrest, acute ischemia of brain tissue will inevitably lead to hypoxic brain injury, and its severity is closely related to the time of cardiac arrest. Although some patients received successful cardiopulmonary resuscitation, they eventually died or had severe sequelae due to irreversible brain function damage. At present, in the aspect of establishing artificial blood circulation, the method of artificial external heart compression is generally used, and the frequency of 80-100 times / minute is used to make the chest wall sink by 4-5 cm. Insufficient compression frequency and insufficient depth lead to unsatisfa...

AI Technical Summary

Problems solved by technology

At present, in the aspect of establishing artificial blood circulation, the method of artificial external heart compression is generally used, and the frequency of 80-100 times / minute is used to make the chest wall sink by 4-5 cm. Insufficient compression frequency and insufficient depth lead to unsatisfactory compression effects; too deep compression and uneven force are prone to complications such as rib fractures; the operator's physical exertion is too large, fatigue is easy, and it is difficult to guarantee the compression effect for a long time; when rescuing SARS, etc. When a patient is severely infected, the probability of the operator being infected is greatly increased

Existing cardiac compression devices are often light, and the compression head is easy to shift, the machine base is unstable, and the compression depth cannot be achieved, and the compression effect cannot be guaranteed; if the positioning is stable, it is often time-consuming to move, such as patent application number 98249385.1 The automatic heart presser, the motor drives the eccentric wheel to achieve the purpose of external heart compression, and is equipped with a manual height adjustment device, but the machine is heavy and inconvenient to move, it cannot achieve the purpose of quick rescue, and it occupies too much space in front of the patient's chest. Affect the development of other rescue steps; pneumatic extracorporeal heart compression devices such as the patent application number 93117260.8 cardiac resuscitation executive device and the patent application number 01274169.8 automatic heart massage resuscitation instrument, due to the impact of air pressure, it is easy to cause rib fractures. The preparation work is also time-consuming; and the hydraulic multifunctional computerized human body cardiopulmonary resuscitation machine with patent application numbers 95111032.2 and 95239721.8 uses hydraulic transmission to press the heart, which is not prone to rib fractures, but the patient must lie on a specific position on the machine. Then put the hydraulic cylinder equipped with a chest belt in front of the patient's chest to rescue, and for patients with cardiac arrest, it is the basic principle to perform external cardiac compression immediately on the spot, so it cannot be practically applied. At present, the State Food and Drug Administration There are no extracorporeal cardiac compression devices in the Bureau's "Medical Device Classification Catalog"

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