Discharge dose accurate control method and device applied to cardiac defibrillator

A precise control and defibrillator technology, applied in the field of medical electronics, can solve the problems of difficult individualized precise control, myocardial damage, increasing the design complexity and manufacturing cost of defibrillator equipment, etc.
CN103816615AInactive Publication Date: 2014-05-28UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
UNIV OF ELECTRONIC SCI & TECH OF CHINA
Publication Date
2014-05-28
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a discharge dose accurate control method and device applied to a cardiac defibrillator. The defibrillator automatically sets the minimum electric energy required by defibrillating discharge according to the magnitude of sensed thoracic impedance. The amplitude reference interval value and the normal phase and reverse phase sawtooth wave total number of a dual phase sawtooth pulse discharge waveform are calculated. According to a preset H bridge switch control policy, the electric energy in an energy storage capacitor is used to carry out fast high voltage electric defibrillating on a patient in the form of dual phase sawtooth wave pulse. According to the invention, based on thoracic impedance sensing of the patient and individually customized dual phase sawtooth pulse discharge, defibrillating discharge current which is superposed on a dual phase rectangular wave and is in the form of a sawtooth fine wave is provided for heart in a ventricular fibrillation state; by controlling the normal phase and reverse phase sawtooth wave number, the patient discharge dose is accurately and flexibly controlled, which is conducive to improving the defibrillating discharge individual pertinence and the success rate of once defibrillating; and by reducing the high voltage amplitude, myocardial damage in a defibrillating process is effectively reduced.
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Description

technical field

[0001] The invention belongs to the technical field of medical electronics, and in particular relates to a discharge dose control method for cardiac defibrillation, in particular to an accurate defibrillation discharge dose based on a biphasic sawtooth square wave output bridge used in an automatic external defibrillator (AED). Control Method. Background technique

[0002] Sudden cardiac death (SCD) is an unexpected circulatory collapse that occurs immediately within 1 hour of clinical symptoms, leading to cardiac arrest, and is the main cause of death from cardiovascular diseases. The epidemiological research results of the Center for Health Statistics in the United States show that more than 50% of all cardiovascular disease deaths are SCD, and the total number of SCD cases in my country is more than 544,000 cases every year; at the same time, in the past few decades, with the aging of the population The occurrence of process SCD has an upward trend. Among...

Claims

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