1. Defibrillation energy intervals are different
The simplest way to distinguish them is from the optional defibrillation energy intervals of defibrillators. The maximum optional defibrillation energy of single-phase defibrillators is 36J, while that of biphasic defibrillators is less than 2J J..
2. Defibrillation direction is different
The so-called monophasic wave and biphasic wave are three classifications of defibrillators according to the direction of defibrillation current.
Single-phase defibrillation, current only flows in one direction between electricity.
Biphasic wave defibrillation, the current first flows in one direction, then reverses and then flows to the other side.
Extended information:
Working principle of defibrillator:
During cardioversion of cardiac defibrillation, an instantaneous high-energy pulse is applied to the heart, with a general duration of 4~1ms and an electric energy of 4~4J (Joule).
The device used for defibrillation of cardiac electric shock is called defibrillator, which can complete cardioversion of electric shock, that is, defibrillation. When patients have severe tachyarrhythmia, such as atrial flutter, atrial fibrillation, supraventricular or ventricular tachycardia, it often causes hemodynamic disorders to varying degrees.
Especially when patients have ventricular fibrillation, because the ventricles have no overall contractility, cardiac ejection and blood circulation are terminated. If not rescued in time, patients often die due to prolonged hypoxia in the brain.
If a defibrillator is used to control the current with a certain energy to pass through the heart, some arrhythmia can be eliminated and the heart rhythm can be restored to normal, so that the patients with the above-mentioned heart diseases can be rescued and treated.
The original defibrillator directly defibrillates with industrial alternating current, which often causes casualties due to electric shock. Therefore, at present, in addition to internal defibrillation with alternating current during heart surgery, direct current defibrillation is generally used.
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