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MATLAB/Simulink Medical CO2 Insufflator Model with a Pressure PID Controller

Laparoscopic minimally invasive surgery (MIS) requires the use of medical carbon dioxide (CO2) insufflator to expand the peritoneal cavity. This is aiming to provide a better and easier view for surgeons during the surgery. Such a device requires a precise pressure and flow control. Since 2017, the Food & Drug Administration (FDA), the medical devices regulation authority in USA, has adopted the use of in-silico model (computational model and simulation) to accelerate and facilitate the costly long-time process of getting FDA approval as well as other medical device regulation authorities. In this paper, MATLAB/Simulink medical CO2 insufflator model has been developed. This Simscape computational model includes sensors (flow, pressure, temperature etc.) and actuators (solenoid valve, reducing valves, safety valves etc.). Also, a pressure Proportional Integral Derivative (PID) controller model has been created to drive precisely and accurately proportional pressure regulator (PPR) in the proposed pneumatic model. Also, a non-linear abdominal model has been made to test the functionality of the whole system. Finally, promising results have been accomplished due to the integration of all models into a final model and its simulation.