Cardiac electricity detecting system using embedded right leg drive

Abstract

The invention relates to an electrocardio detection system which is provided with a right leg drive that is internally arranged, which comprises a preamplifier, a multi-channel analogue switch, a main amplifier, an A / D converter, a D / A converter, an output amplifier, a microprocessor, etc. The electrocardio detection system is provided with the right leg drive, which can respectively compensate signals to each lead and eliminate signal aberration of the right leg drive caused by excursion of a 'central electrode', thereby anti-interference capacity is further enhanced and detection quality of electrocardio signals is greatly improved. In the electrocardio detection system composed by the technique, a right leg drive electrode does not need to be connected externally and therefore, the operation process of the electrocardio detection is simplified. The detection system can be applied to the electrocardio detection system such as electrocardiogram devices, electrocardiogram monitoring devices and dynamic electrocardiogram devices, etc.

Description

technical field [0001] An electrocardiogram detection system, especially an electrocardiogram detection system that adopts a built-in right leg drive, is used in the medical clinical field. Background technique [0002] Modern ECG signal detection is established on the basis of the Einthoven equilateral triangle model. The right arm, left arm and left leg limb electrodes are used as the vertices of the triangle to form a bipolar lead, and the three limb electrodes are connected together to form a "central electrode". The chest electrode and the "central electrode" form a unipolar lead. Although there is still a weak electrical signal at the "central electrode", for practical purposes, in clinical medical ECG detection, this electrode is regarded as a zero point and becomes a reference electrode. Since the electrocardiographic signal is a weak electrical signal, in the actual detection of the electrocardiographic signal, a strong common-mode interference signal will be gener...

AI Technical Summary

Problems solved by technology

However, the human body is not actually an equilateral triangle model proposed by Einthoven, but a scalene triangle model with an eccentric position proposed for Burger. The actual human body model will cause the "center electrode" to shift

In the case of "central electrode" offset, the reverse-processed right leg drives the common-mode interference signal. Since the side lengths of each lead are not equal, it will be converted into a differential-mode signal on the limb lead. At this time, the right leg is used Drive technology eliminates common-mode interference and does not achieve optimal results

At the same time, since the right leg electrode must be used outside in the detection, the detection operation process is relatively cumbersome

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