"Defibrillator high-voltage pulse PCBA" refers to the defibrillator high-voltage pulse printed circuit board assembly. The following is a detailed introduction to it:

　　Overview

　　The defibrillator high-voltage pulse PCBA is one of the core components of the defibrillator. It is mainly used to generate and control high-voltage pulse current, which is transmitted to the patient's body through the electrode sheet to restore the normal rhythm of the heart. It integrates a variety of electronic components and complex circuits, and can accurately generate high-voltage pulses that meet medical standards. At the same time, it has a high degree of safety and reliability to ensure that patients can be defibrillated quickly and effectively in emergency situations.

　　Components

　　High-voltage power supply module: responsible for converting the input lower voltage into the high voltage required for defibrillation. Usually, switching power supply technology is used to increase the DC voltage provided by the mains or battery to a high-voltage DC of several thousand volts through components such as transformers, rectifiers and filters.

　　Pulse generation circuit: Based on the high-voltage DC generated by the high-voltage power supply, a high-voltage pulse with a specific waveform and parameters is generated. This part of the circuit is usually composed of components such as capacitors, inductors, and switching tubes. By accurately controlling the on and off time of the switching tube, a pulse waveform that meets the defibrillation requirements is formed, such as a biphasic wave or a single-phase wave.

　　Control and monitoring circuit: It consists of a microcontroller, sensors and related logic circuits. The microcontroller is responsible for the operation control of the entire PCBA, including setting pulse parameters according to the defibrillation mode, monitoring battery power and system status, etc. The sensor is used to detect the patient's impedance, electrode connection status and other information in real time, so as to adjust the pulse parameters to ensure the defibrillation effect and patient safety.

　　Safety protection circuit: In order to prevent accidents during defibrillation from causing harm to patients or medical staff, a variety of safety protection mechanisms are set up. For example, the overvoltage protection circuit can prevent the output voltage from being too high; the overcurrent protection circuit can cut off the circuit when the current is abnormal; the insulation monitoring circuit is used to detect the insulation performance of the system to ensure electrical safety.

　　Working principle

　　Charging process: When the defibrillator is turned on and ready for defibrillation, the high-voltage power supply module starts working, converting the input voltage into high-voltage DC and charging the energy storage capacitor. The energy storage capacitor gradually stores enough energy to prepare for the generation of high-voltage pulses. During the charging process, the control circuit monitors the capacitor voltage in real time, and when the voltage reaches the set value, the charging stops.

　　Pulse emission: When defibrillation is required, the control circuit triggers the pulse generation circuit according to the preset defibrillation mode and parameters. The pulse generation circuit releases the energy in the energy storage capacitor with a specific waveform and frequency by controlling the action of the switch tube to form a high-voltage pulse current. The current is transmitted to the patient's body through the electrode sheet, generating a strong electric field in the heart tissue, depolarizing the myocardial cells, thereby terminating the abnormal heart rhythm and restoring normal sinus rhythm.

　　Feedback and adjustment: During the defibrillation process, the control and monitoring circuit will collect relevant information of the patient in real time, such as impedance changes. Based on this feedback information, the microcontroller can adjust the parameters of the next defibrillation pulse, such as energy size, pulse width, etc., to improve the success rate of defibrillation. At the same time, the safety protection circuit will continuously monitor the operating status of the system. Once an abnormal situation is found, such as overvoltage, overcurrent, etc., protective measures will be taken immediately to stop defibrillation and sound an alarm.

　　Application scenario

　　Hospital emergency department: It is one of the main application scenarios of the high-voltage pulse PCBA of the defibrillator. In emergency rooms, intensive care units, operating rooms and other places, when patients have emergency arrhythmias such as cardiac arrest and ventricular fibrillation, the defibrillator can be quickly put into use, and the high-voltage pulse current generated by the high-voltage pulse PCBA is used for defibrillation, which buys precious rescue time for the patient.

　　Mobile emergency equipment such as ambulances: Defibrillators are also widely equipped in mobile emergency equipment such as ambulances. On the way to the hospital, emergency personnel can use the defibrillator to perform timely defibrillation treatment on patients to ensure the safety of patients during transportation. The high reliability and miniaturization design of the high-voltage pulse PCBA enable it to adapt to various requirements in mobile environments.

　　Emergency rescue in public places: Some public places, such as airports, railway stations, shopping malls, schools, etc., have also begun to be equipped with automatic external defibrillators (AEDs). The high-voltage pulse PCBA in these AEDs can also quickly generate high-voltage pulses in emergency situations for non-professionals to perform defibrillation operations on patients with sudden cardiac arrest, thereby increasing the patient's chance of survival.