Biphasic waveform defibrillation circuit and defibrillator
A biphasic wave and circuit technology, applied in the field of defibrillators, can solve problems such as weakening of the treatment effect
Active Publication Date: 2012-07-11
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD +1
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Therefore, the current flowing through the patient during the second-phase pulse discharge is significantly smaller than the first-phase pulse, especially for patients with small chest impedance, the current of the second-phase pulse is obviously smaller, thus weakening the therapeutic effect
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[0019] When it is necessary to use a defibrillator to defibrillate a patient, the biphasic wave defibrillation method is usually used, that is, the first phase pulse is applied to the patient, and then the second phase pulse opposite to the first phase pulse is applied. Applied to the patient, in this application, it is assumed that the first phase pulse is in the positive direction, and the second phase pulse is in the reverse direction. The switch state is selectively switched by the switch circuit to successively apply the first phase pulse in the forward direction and the second phase pulse in the reverse direction to the defibrillation electrodes.
[0020] The present invention proposes an idea of using two energy storage devices for biphasic wave defibrillation therapy, wherein one energy storage device is the main discharge device, and the other energy storage device (the second energy storage device) is used as the auxiliary discharge device. That is, the first energ...
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The invention discloses a biphasic waveform defibrillation circuit and a defibrillator. The defibrillation circuit comprises a switching circuit, a first energy storage device and a second energy storage device, wherein the switching circuit is coupled to sequentially apply first phase pulse and second phase pulse to a defibrillation electrode by switching the switch state in a controlled way; the first energy storage device is coupled to the defibrillation electrode with the switch state being switched through the switching circuit during double-phase pulse process, and not only conveys first phase pulse current to the defibrillation electrode, but also conveys second phase pulse current to the defibrillation electrode; the second energy storage device and the first energy storage device convey the first phase pulse current or the second phase pulse current to the defibrillation electrode in a combination way; and the combination way ensures that the constant of the second phase discharge time is different from that of the first phase discharge time, or the starting voltage of the second phase pulse is larger than the finish voltage of the first phase pulse, so that the curative effect of the second pulse is improved, and the purpose of improving the cardioversion rate of patients is achieved.
Description
technical field [0001] The invention relates to a defibrillator, in particular to a biphasic wave defibrillation circuit of the defibrillator. Background technique [0002] According to relevant statistics, more and more people in the world have lost their lives due to heart attack without effective and timely treatment. Among them, ventricular fibrillation is the biggest threat to human life, that is, the ventricle loses its blood supply ability and can no longer support the heart. A state in which the body pumps the required volume of blood. According to research in the medical field, the most effective treatment for ventricular fibrillation is to defibrillate the patient, that is, to use a large current pulse to stimulate the ventricle to restore normal blood pumping function. [0003] The current standard for automatic external defibrillation is a biphasic waveform. At present, the more commonly used defibrillation method is to use biphasic waves for defibrillation ther...
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Login to View More IPC IPC(8): A61N1/39
CPCA61N1/3912
Inventor 邵安岑周赛新安敏
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD