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Method and system for external defibrillation based on chest impedance detection

A chest impedance, human body technology, applied in the direction of cardiac defibrillator, electrotherapy, treatment, etc., can solve the problem of fluctuations in the effective output current of electric defibrillation

Active Publication Date: 2018-08-17
ARMY MEDICAL UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a method and system for external defibrillation based on thoracic impedance detection, which solves the problem of fluctuations in the effective output current during electric shock defibrillation

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  • Method and system for external defibrillation based on chest impedance detection
  • Method and system for external defibrillation based on chest impedance detection
  • Method and system for external defibrillation based on chest impedance detection

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Embodiment Construction

[0025] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and therefore are only examples, rather than limiting the protection scope of the present invention.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

[0027] see figure 2 A method of external defibrillation based on chest impedance detection provided in this embodiment includes the following steps:

[0028] In the first step, when the charging button of the instrument is pressed and the capacitor needs to be charged, the external defibrillation electrode is used to apply a high-frequency and low-current excitation signal to the h...

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Abstract

The invention provides a method and system for external defibrillation based on chest impedance detection. During a charging process, a thoracic impedance signal is obtained through a defibrillation electrode, the thoracic impedance signal is digitally collected and then is processed, a first charging voltage and a first output pulse width required in completing defibrillation are calculated, thecharging voltage is monitored by using a voltage monitoring circuit, and the charging is stopped after reaching a first charging voltage value. During a discharging process, the pulse width of an output waveform is adjusted by controlling a discharging time, and the discharging is stopped after reaching a pulse width preset value. Through the precise control of the charging voltage and the discharge pulse width, the relative constancy of output current and output energy is achieved, excessively low or high output current and energy are avoided, and thus the defibrillation measurement of different patients is accurately controlled.

Description

technical field [0001] The invention relates to the technical field of external defibrillation, in particular to a method and system for external defibrillation based on chest impedance detection. Background technique [0002] Arrhythmia refers to an abnormality in the origin of heart rhythm, heart rate and rhythm, or impulse conduction. Using a strong pulse of electrical current through the heart to correct an arrhythmia is called defibrillation. An external defibrillator is a device used to defibrillate the heart by electric shock. It is mainly composed of a defibrillation charging / discharging circuit, an ECG signal amplification / display circuit, a control circuit, a power supply, and two defibrillation electrodes. The defibrillation electrodes include the sternum electrode and the apex electrode, which are used to detect the patient's ECG signal and deliver high-voltage current to the patient. The principle of charge / discharge circuit is as figure 1 mentioned. In the ...

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Application Information

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IPC IPC(8): A61N1/39
CPCA61N1/3987A61N1/3904
Inventor 李永勤魏良龚渝顺王建杰陈碧华何密
Owner ARMY MEDICAL UNIV
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