In laparoscopic surgery, the main function of the trocar is to establish an abdominal channel for surgical instruments, so that the surgical instruments can enter the abdominal cavity through the channel for surgical operations. However, the superior dynamic air tightness and the smoothness of entering and exiting the device are inherent contradictions. Pursuing air tightness requires sacrificing smoothness, and pursuing smoothness requires sacrificing air tightness. Performance pain points.

The clinical requirements of the trocar include three points:

1. Reliable installation stability, the trocar can be stably installed on the abdominal wall during the operation, that is, it can be firmly installed on the abdominal cavity during the operation, and will not move with the movement of the surgical instrument, which will affect the normal operation of the operation, or even leave the abdominal cavity for the operation. bring risk.

2. Excellent dynamic sealing performance, it can maintain good gas sealing performance when the surgical instruments move left and right and twitch up and down, avoiding the collapse of the abdominal cavity caused by the leakage of gas in the abdominal cavity, which is inconvenient for continuous operation, thereby causing medical accidents.

3. Good smoothness, the surgical instruments should be kept smooth when inserted into the trocar or taken out from the trocar, with low friction and smooth in and out, which is convenient for the manipulation of the instrument during the operation, and at the same time avoids the fatigue of the doctor during long-term operation.