At present, the abdominal cavity technology has been widely used in various specialized operations, and the doctors completely rely on the image information conducted by the endoscopy to perform the operation during the laparoscopic operation. Therefore, it is extremely important to maintain the clarity of the intraoperative real-time images. Common problems in laparoscopic surgery mainly include: blurring and fogging of the lens, emission of carbon dioxide and irritating gas smoke in the abdominal cavity.

Surgical smoke refers to gaseous substances produced during surgery, also known as aerosols, burning smoke, etc. It is formed by gamma knife, high-frequency electrocautery knife, laser knife, ultrasonic scalpel, high-speed drill, saw blade, equipment burr destruction and vaporized tissue protein and fat during surgical operation. Surgical smoke not only obstructs the sight of operators, but also releases toxic and harmful substances into the air. Therefore, the surgical exhaust can promptly eliminate the CO2 exhaust gas and smoke during the operation, clean the air in the operation room, and reduce the occupational hazards of the medical staff.