Von Mises stress analysis of surgery chair designed for laparoscopic surgeon with lifting mechanism

Laparoscopic surgeons can experience musculoskeletal disorders due to standing for long periods during surgical procedures. Surgery chair can help laparoscopic surgeons in overcoming these problems so that they carry out surgical procedures in a sitting position. However, the surgery chairs currently on the market use a hand-controlled pedal for the lifting mechanism, which is an obstacle for laparoscopic surgeons because it interferes with the concentration of the hands in using surgical tools. This study contributes to the development of the latest design of a surgery chair designed for Indonesian laparoscopic surgeons with a foot-controlled pedal so that it does not interfere with the concentration of the laparoscopic surgeon in using surgical tools to carry out surgical procedures. The lifting mechanism of the proposed surgery chair uses a worm gear with the rationalization of the rotation lock, space efficiency, and minimizes sound when lifting mechanism. Computational simulations via the finite element method were carried out on the mechanical components of the current surgery chair to analyze the von Mises stress under the down, middle, and top lifting mechanism conditions. The von Mises stress results show that the proposed surgery chair design is safe. This achievement is expected to be an initiation for the development of a better surgery chair in the future.