MICROCONTROLLED ELECTROSTIMULATOR FOR SURGICAL PURPOSES

Abstract

This paper presents the development of a microcontrolled electrostimulator designed to support surgical procedures for anomaly correction, emphasizing electrical safety and precise pulse control. The device, built around a PIC16F877A microcontroller, generates stimuli at 2, 3, and 4 Hz with pulse widths of 200 µs and 500 µs, selected directly on the front panel without the need for a computer while preserving reprogrammability for future ranges. The electrical architecture incorporates current limiting at the generator input and galvanic isolation via transformer, mitigating patient risk. Bench tests and Proteus simulations were conducted to verify frequency, pulse width, and signal integrity; oscilloscope measurements confirmed agreement between programmed parameters and generated signals. The work also details design decisions regarding power supply, filtering, hardware layout, and the operator interface. Results indicate stable prototype operation within specified limits and potential clinical applicability, pending further validation such as in vivo studies and assessments in hospital settings.