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Cardiac monitor module capable of resisting high frequency electric knife interference

A technology of ECG monitoring and high-frequency electrosurgery, which is used in medical science, heating surgical instruments, sensors, etc., can solve the problems of inability to timely, effectively and accurately understand patients, and difficulty in obtaining ECG data for ECG monitoring instruments. Achieve the effect of suppressing the interference of high-frequency electrosurgery

Inactive Publication Date: 2006-07-26
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, when the electric knife is used, the electrical interference generated by it will enter the ECG acquisition module through various channels such as conduction and radiation of the body, making it difficult for the ECG monitoring instrument to obtain correct ECG data, and doctors cannot timely, effectively and accurately understand the patient's condition

Method used

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  • Cardiac monitor module capable of resisting high frequency electric knife interference
  • Cardiac monitor module capable of resisting high frequency electric knife interference

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Embodiment Construction

[0015] In order to achieve the purpose of providing an ECG monitoring module capable of effectively suppressing the interference of high-frequency electric knife, the present invention is realized through the following technical solutions. The high-frequency interference of the electrosurgical knife is attenuated by using a large time constant resistance-capacitance network, and at the same time, a DC low-gain differential amplifier and a high-resolution analog-to-digital converter are used to collect data, which avoids the resistance-capacitance coupling circuit in the AC amplifier. The problem of blockage also avoids the problem of non-linearity caused by voltage limiting protection circuits such as neon bulbs and diodes and cannot continuously monitor the patient's ECG. It also avoids the problem that the input dynamic range of the high-gain amplifier is small and it is easy to enter nonlinearity.

[0016] The present invention will be further described below in conjunction ...

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Abstract

The invention relates to physical electrical field, the medical equipment, which in detail relating to an electric knife-resistant cardio-electric monitoring module, technical project of which comprises: the 0 capacitance-resistance filter receiving the two-way electro-cardio signal, the output of the 0 capacitance-resistance filter passing the first protecting clamper, common mode drive circuit, right-leg drive circuit and the third capacitance-resistance filter in turn; one of said two-way electro-cardio signal passing the first capacitance-resistance filter, the third protecting clamper in turn to be input to parallel differential amplifier; the other electro-cardio signal passing the second capacitance-resistance filter, the second protecting clamper in turn to be input to parallel differential amplifier; the output of which is connected to high-resolution cathode analogue / digital converter; the connection of the first and second capacitance-resistance filter is connected to common mode drive circuit. The invention is mainly used in patient monitor for operation.

Description

technical field [0001] The invention relates to the application of electronic technology in medical instruments, in particular to an anti-high-frequency electric knife ECG monitoring module. Background technique [0002] Electrosurgical unit (ESU) is an electrosurgical instrument for tissue cutting and coagulation. It converts 220V / 50Hz low-voltage and low-frequency current into a frequency of 400-1000kHz and a voltage of thousands or even tens of thousands of volts through frequency conversion and voltage conversion and power amplification. High-frequency current acts on the human body with high current density through effective electrodes, so as to achieve the purpose of cutting and coagulation. Monitoring of electrocardiographic signals (ECG) is essential during surgery. However, when the electrotome is used, the electrical interference generated by it will enter the ECG acquisition module through various channels such as conduction and radiation of the body, making it d...

Claims

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Application Information

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IPC IPC(8): A61B5/0402A61B19/00A61B18/12
Inventor 李刚林凌
Owner TIANJIN UNIV
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