MATLAB/Simulink Medical Fluid Pump Model with a Flow PID Controller

Minimally invasive surgeries are one of the fastest growing medical fields today because of patient benefits such as faster recovery and reduced risk of infection. However, minimally invasive surgeries are quite challenging for the surgeon to perform because of reduced maneuvering space and visibility. As a result, more and more technological solutions are developed to aid the surgeon in this task. Medical fluid pumps are designed to: improve the visibility, control flow, maintain the pressure in operating cavity, and prevent fluid uptake that can, in severe cases, be fatal for the patient. In this paper, Simulink/Simscape medical fluid pump model has been developed. This model includes the following components: sensors (flow & pressure), speed and current controller DC motor, Dc motor driver, DC motor, Gear box, fixed displacement pump, and flow Proportional Integral Derivative (PID) controller. Finally, simulation was made and promising results have been achieved.