Laparoscopic gastric resection system for suspension and traction exposure

Abstract

This application relates to the field of medical device technology and discloses a suspension traction exposure system for laparoscopic gastrectomy, including a tissue suspension clamp, a medical suspension cable, a winding reel, a linear stepper motor, a tension sensor, a photoelectric encoder, and a microcontroller unit. The microcontroller unit synchronously acquires real-time composite traction tension signals and real-time absolute linear displacement signals and performs frequency domain decoupling to separate high-frequency disturbance tension components and low-frequency baseline tension components. The microcontroller unit extracts the high-frequency disturbance tension components to control the linear stepper motor to perform high-frequency channel compensation; it calculates the apparent stiffness value of soft tissue based on the high-frequency disturbance tension range and the high-frequency disturbance displacement range to update the target tension threshold; and it compares the low-frequency baseline tension components with the updated target tension threshold in real time, controlling the linear stepper motor to perform low-frequency channel baseline maintenance. This invention can actively compensate for displacement disturbances and tissue stress relaxation caused by mechanical ventilation, reducing the risk of local tissue tearing.

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