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External defibrillator for automatic identification of ventricular tachycardia and ventricular fibrillation based on symbolic sequence entropy of second-order derivative coding

A symbolic sequence and second-order derivative technology, applied in cardiac defibrillators, sensors, medical science, etc., can solve problems such as increasing pain in patients, increasing thermal damage to patients' bodies, and failure of defibrillation

Inactive Publication Date: 2011-12-21
FUDAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] Too little defibrillation energy may lead to defibrillation failure; too much defibrillation energy will greatly increase the thermal damage to the patient's body and increase the patient's pain

Method used

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  • External defibrillator for automatic identification of ventricular tachycardia and ventricular fibrillation based on symbolic sequence entropy of second-order derivative coding
  • External defibrillator for automatic identification of ventricular tachycardia and ventricular fibrillation based on symbolic sequence entropy of second-order derivative coding
  • External defibrillator for automatic identification of ventricular tachycardia and ventricular fibrillation based on symbolic sequence entropy of second-order derivative coding

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings.

[0056] figure 1 It is a system block diagram of the present invention. The main body of the present invention is AED10, and its hardware system is composed of: ECG acquisition and analysis unit 20, transthoracic impedance measurement unit 30, charging / discharging circuit unit 40, human-computer interaction interface unit 50, master control unit 60 and storage printing function Unit 70. The ECG collection and analysis unit 20 and the transthoracic impedance measurement unit 30 send the collected ECG signals and transthoracic impedance values ​​to the master control unit 60; the master control unit 60 automatically determines that the heart rhythm that can be cardioverted by electric shock is ventricular tachycardia or ventricular fibrillation Afterwards, a suitable defibrillation scheme is decided, and a defibrillation command is sent to the charge / discharge circuit ...

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Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to an in-vitro defibrillator for distinguishing ventricular tachycardia and ventricular fibrillation automatically on the basis of a symbol sequence entropy of second derivative codes. In the in-vitro defibrillator, shockable rhythms are distinguished automatically to be the ventricular tachycardia or the ventricular fibrillation by calculating the symbol sequence entropy of second derivative codes of a signal, so that the appropriate defibrillation scheme is determined on the basis of the ventricular tachycardia or the ventricular fibrillation, wherein the scheme comprises the following steps of: preprocessing, namely filtering the collected electrocardiosignal; identifying if the electrocardiosignal is the shockable rhythms or not; calculating the symbol sequence entropy of the second derivative codes of the shockable rhythms; distinguishing the ventricular tachycardia / the ventricular fibrillation according to the symbol sequence entropy; and deciding the defibrillation scheme according to the ventricular tachycardia / the ventricular fibrillation. The in-vitro defibrillator can reduce the injury on mind and bodies of patients and improve the pertinence and success rate of defibrillation.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to an automatic external defibrillator. Background technique [0002] Sudden cardiac death (SCD) is sudden natural death due to cardiac causes. Most of the causes of sudden cardiac death are temporary dysfunction and electrophysiological changes on the basis of various cardiovascular diseases, and cause malignant ventricular arrhythmias such as ventricular tachycardia (ventricular tachycardia, VT), ventricular fibrillation, etc. Fibrillation (ventricular fibrillation, VF), etc. After the onset of malignant ventricular arrhythmia, the rescue success rate will continue to decrease with the passage of time. After 7-10 minutes, the rescue success rate will generally be as low as 10%. Therefore, rapid electric shock defibrillation is the best way to terminate most rapid malignant ventricular Arrhythmia, the preferred effective method to save the lives of patients....

Claims

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Application Information

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IPC IPC(8): A61N1/39A61B5/046A61B5/361
Inventor 邬小玫杨圣均刘聪方祖祥
Owner FUDAN UNIV
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