Portable Manual External Defibrillator: Shock Control and Function

Automated external defibrillators are medical devices used to treat sudden cardiac arrest. If administered within minutes of cardiac arrest, a defibrillation shock can reset the heart to a normal synchronous rhythm and improve the outcome of cardiopulmonary resuscitation. The sponsor is interested in developing a prototype defibrillator intended for affordable personal ownership. The design emphasis is on small size, ease of use, and simplicity of function in light of FDA stipulations regarding safety and effectiveness. The goal of this project is to design the charging and shocking circuit elements to be used with the heart rhythm analytic algorithm developed by Team 15069. To deliver the required 200-joule shock, the charging and shocking circuit includes a large capacitor, a voltage multiplier, and a flyback transformer to ramp up the voltage. User-friendly and durable packaging was designed to protect the internal circuitry, and a model of the packaging was designed using SolidWorks and printed in 3-D using a static-sensitive material. The packaging also houses a speaker and LCD screen that provides prompts for user ease of mind while treating a patient. The packaging, shocking, and charging circuit will be integrated with the heart rhythm analytic algorithm to create the final product for CardioSpark.