Surgery is a common surgical position with a variety of supine, lateral, and prone positions. Which one to use needs to be determined by considering where the patient’s surgical site is and where the surgeon needs to perform the surgery from. The supine position is commonly used for gallbladder surgery or surgery on the liver, gallbladder, pancreas, and spleen, which also requires raising the surgical bridge. Lateral position surgery is common for lung resection, nephrectomy, etc. It can be performed in semi-lateral or lateral position and requires proper immobilization of the body in order to maintain stability. Prone position surgery is mainly trans-back surgery, which requires the patient to lie prone on the operating table with the head turned to the side and to keep breathing open. Other procedures such as transvaginal surgery and anorectal surgery require the knee to be bent in a truncal position.