Front-end protection circuit and method of medical local anesthesia plane monitor

Abstract

The invention provides a front-end protection circuit and method of a medical local anesthesia plane monitor, the detection electrode is coupled to the input end of the amplifier, and the output end of the amplifier is connected to the detection signal input end of the monitor processing circuit; the protection The circuit includes a delayer, an OR gate, a counter, a switch tube, and a normally closed relay switch; wherein, the input end of the delayer and the enable input end of the amplifier are both connected to an enable output end of the monitor processing circuit. The structure of the invention is simple and efficient, and can accurately sense and discharge static electricity in time and fully. It can achieve the maximum isolation of the electrostatic discharge path.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a front-end protection circuit of a medical local anesthesia plane monitor and a method thereof. Background technique [0002] In recent years, with the improvement of living standards and the trend of population aging, the medical monitoring market has achieved unprecedented development. Among them, the most common anesthesia monitor includes ECG, blood pressure, and blood oxygen routine monitoring items, and is one of the indispensable medical devices for hospitals and families. [0003] The bioelectric phenomenon of the human body is picked up by electrodes using a certain lead method, and various non-electrical parameters are picked up after being transformed into electrical signals by various sensors. Electrode forms include skin surface electrodes, body surface electrodes, needle electrodes, microelectrodes, etc. There are many shapes of body surface electrodes, such as meta...

AI Technical Summary

Problems solved by technology

Since most of the electrodes need to be in contact with the skin, and the skin has static electricity, especially in a dry environment, its instantaneous high current can easily cause damage to the monitoring instrument and make it invalid

[0004] However, there is no ideal solution for the front-end protection of electrodes in the market at present. It is difficult to completely isolate the high-voltage and high-current impact at the moment of contact only through some voltage-resistant devices, and there is still a risk of damage to monitoring instruments. Therefore, there is an urgent need for a A new technical solution to completely isolate the risk of electrostatic breakdown to solve the deficiencies in the existing technology

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