EL 08 - Automatic Pneumatic Tourniquet

The Automatic Pneumatic Tourniquet System (APT System) is a biomedical device designed to automate the inflation of a tourniquet cuff used during surgical procedures to temporarily restrict blood flow. The goal of the project is to improve accuracy, consistency, and safety in clinical applications, especially in settings where access to high-end commercial systems is limited. The system is built using an Arduino Uno microcontroller, a pressure transducer, a keypad shield, relay modules, and a pneumatic motor. The user enters the desired pressure and time using the keypad. The Arduino reads real-time pressure values from the transducer and activates the pneumatic motor through relay control to inflate the cuff. Once the desired pressure is reached, the motor stops automatically, and the system maintains the cuff pressure for the set duration. Power is supplied using a 12V adapter, and a DC-DC step-down converter is used to provide 9Vand 5V outputs to meet the voltage requirements of different components. This project offers a cost-effective and user-friendly solution for controlled tourniquet application, aiming to support safe surgical practices in both urban and remote healthcare environments.