Design of Temperature Control System of Insufflator Based on Fuzzy and PID Algorithm

Laparoscopic surgery is a widely used minimally invasive surgery. Although using warm carbon dioxide to establish pneumoperitoneum has been demonstrated beneficial, building a high-precision and fast-response temperature control system is difficult to achieve. To this end, we propose a temperature control system for insufflator with hot and cold flow mixed. Firstly, we design the pipeline structure of the system, and the circuit hardware considering the selected components. Then, two stages, including preheating and delivery stage, are developed to improve the heating efficiency of the system, which are controlled by fuzzy logic and PID algorithm, respectively. Besides, we construct the simulation model to investigate the transfer characteristics of the heating system. Finally, a prototype of the system is developed, and experiments are performed to validate its effectiveness. The proposed system provides a feasible scheme of carbon dioxide heating for building pneumoperitoneum.