Electrotome interference resisting electroencephalogram signal detection system and device

Abstract

The invention discloses an electrotome interference resisting electroencephalogram signal detection system and device. The device comprises an electrode slice, an electrostatic suppression module, anelectromagnetic suppression filter module, a signal amplification module, a digital filter module, a cable and a shielding case, wherein the electrode slice is used for acquiring electroencephalogramsignals, the cable is used for transmitting the electroencephalogram signals, and the shielding case is used for suppressing electromagnetic radiation interference generated by an electrotome. The electrostatic suppression module outputs the electroencephalogram signals to the signal amplification module through the electromagnetic suppression filter module after electrostatic discharge of the electroencephalogram signals, the signal amplification module amplifies the electroencephalogram signals after electrostatic discharge and then outputs the electroencephalogram signals to the digital filter module, the digital filter module filters the amplified electroencephalogram signals and then outputs and displays the electroencephalogram signals, and the electromagnetic suppression filter module is used for suppressing conducted electromagnetic interference generated by the electrotome. A plurality of suppression barriers are set according to sources and conduction routes of electrotome interference signals, interference generated by the electrotome is effectively suppressed, and electroencephalogram signal acquisition effectiveness and accuracy are ensured.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an electroencephalogram signal detection system and device capable of resisting electric knife interference. Background technique [0002] When collecting EEG or ECG signals in clinical practice, a high-frequency electric knife may be needed to intervene in the human body for treatment, for cutting and coagulation. This equipment is a high-power device, and it is known that high-frequency electric knife (300KHZ-500KHZ) is commonly used. And radio frequency electric knife (900KHZ-6MHZ), the power varies with different functions, and the regulations require a maximum power of 350W. This signal is transmitted through the human body surface or internal tissue + radiation in space, which will generate associated disturbance signals. The signal will be superimposed on the bioelectrical sampling electrode, which will lead to sampling errors and even blockage of the sampling ...

AI Technical Summary

Problems solved by technology

However, the magnitude of the electrotome interference is greatly affected by whether the physiological electrical signal acquisition sensor is placed close to the electrotome, whether it is on the return path between the electrotome and the return electrode, and whether the return electrode plate of the electrotome is in good contact with the human body. Large, and then cause the interference of the electric knife to cause the saturation of the receiving circuit, or even damage

This is especially prominent in conventional EEG machines or anesthesia depth monitors based on the collection of weak human physiological electrical signals. The receiving circuit of the signal is much larger, and the receiving circuit of the EEG signal is more likely to be saturated

In the case of the saturation of the receiving circuit, it is impossible to eliminate the interference of the electrosurgical knife through the method of driving by the human body

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