Method, system and external defibrillator for suppressing electrocardiographic interference caused by cardiopulmonary resuscitation

Abstract

The invention discloses a method and system for restricting the ECG (Electrocardiogram) interference caused by cardio-pulmonary resuscitation and an external defibrillator, relating to the technical field of EGG detection. The method comprises the following steps: 1, acquiring an ECG signal and a voltage signal of a reference signal; 2, processing and analyzing the acquired ECG signal and voltage signal; 3, comparing the processed signals with a set value; 4, when the processed signal is greater than the set value, carrying out adaptive filtering; 5, when the processed signal is less than the set value, carrying out rhythm analysis; 6, processing and analyzing the signal subjected to adaptive filtering and returning to continuously execute the step 3. The method and system and the external defibrillator disclosed by the invention, the acquired ECG signal and the reference signal subjected to frequency domain analysis, and the energy of inference in the ECG signal and the proportion to the interference energy to the total energy of signals are calculated. The frequency of circulation filtering and the step length factor of adaptive filtering are controlled by using the proportion of the interference energy so as to realize dynamic adjustment of the filtering strength, the pushing interference element in the ECG signal is furthest restricted and the characteristics of the ECG signal are highlighted.

Description

technical field [0001] The invention relates to the technical field of electrocardiogram detection, in particular to a method for suppressing electrocardiographic interference caused by cardiopulmonary resuscitation. Background technique [0002] At present, cardiopulmonary resuscitation (CPR) is a key measure for rescuing critically ill patients with sudden cardiac arrest, and the quality of chest compression directly affects the survival of patients. Therefore, the 2010 International Cardiopulmonary Resuscitation Guidelines require a compression frequency of at least 100 times per minute, and an adult compression depth of at least 5 cm. However, deep chest compressions will greatly interfere with the detection of the patient's ECG signal. Because the presence of strong interference overwhelms the patient's original ECG signal, emergency personnel cannot accurately judge the patient's ECG rhythm, and the automatic external defibrillator cannot effectively detect the ECG rhy...

AI Technical Summary

Problems solved by technology

However, when the patient's basic rhythm is not ventricular fibrillation (such as pulseless electrical activity, cardiac arrest), the specificity of the algorithm cannot meet the requirements, which will lead to a large number of misjudgments, and wrongly judge the situation that is not ventricular fibrillation. Ventricular fibrillation such that unnecessary interruption of CPR

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