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心律失常在药物治疗无效时,进行电击除颤可收到良好效果。去颤器有许多种类型,本文着重介绍治疗房性心律失常的直流同步去颤器。一、工作原理目前,国内外生产的直流同步去颤器属电容器放电式,其工作原理如图1所示。治疗时,先接通“充电按钮”,使电容器充电。设电容器的电容为C微法,充电到V伏特,则电容器储存的电能为W=1/2CV~2瓦·秒(即焦耳)。充电到所需能量后,即断开充电按钮,然后接通“去颤放电”按钮,这时仪器利用病人心电图的R波去触发同步延迟触发器,使电流通过继电器J_1和J_2以便吸合相应的接点开关J_1′及J_2′。当J_1′吸合至接点2时,电容器C经过电感线圈L向病人心脏(R_L)
Arrhythmia In the ineffective drug treatment, shock defibrillation can receive good results. There are many types of defibrillators, this article focuses on the treatment of atrial arrhythmia DC synchronous defibrillator. First, the working principle At present, domestic and foreign production DC synchronous defibrillator is a capacitor discharge type, its working principle shown in Figure 1. Treatment, first connected to the “charging button”, so that the capacitor charge. Suppose the capacitance of the capacitor is C-microfarad and charged to V volts, then the capacitor stores W = 1 / 2CV ~ 2W · s (Joule). After charging to the required energy, that is, disconnect the charge button, and then turn on the “defibrillator discharge” button, then the instrument uses the R wave of the patient’s ECG to trigger the synchronous delay trigger, the current through the relays J_1 and J_2 in order to pull the corresponding Of the contact switches J_1 ’and J_2’. When J_1 ’is attracted to contact 2, the capacitor C passes through the inductor L to the patient’s heart (R_L)