2. 1 In addition to routine visits, attention should also be paid to whether the patient has bone and joint diseases, venous thrombosis of lower limbs, sensory or motor disorders, skin lesions, etc. that affect the lithotomy position. If there is any abnormality, you should contact the doctor in time.

2.2 Posture placement and precautions during operation

2.2. 1 The ischial tubercle should be 5-6cm beyond the lower edge of the back plate, and a cushion should be placed behind the sacrum.

2.2.2 In supine position and hip flexion position, the height of leg frame should be equal to the height of thigh; The two joints of the leg, that is, the high-low angle adjustment joint of the bracket and the tilt angle adjustment joint of the leg rest, should be fixed firmly after posing.

2.2.3 The leg rest should be supported at the lower leg and parallel to the lower leg. A sponge pad should be added to the leg rest, and it should be smooth and wrinkle-free to prevent local tissues from being crushed by wrinkles.

2.2.4 The longitudinal axis of thigh and trunk should be 90 ~ 100. Too small is not conducive to abdominal surgery, while too large will increase the leg rest load.

2.2.5 The longitudinal axes of thighs and calves should form an angle of 90 ~100. If the angle is too small, it will press the popliteal fossa; If it is too large, it will not meet the physiological conditions, and it will also increase the force on the distal leg.

2.2.6 The included angle between lower limbs should be 80 ~ 90, too small is not conducive to operation, too large is easy to cause the fibula head to press on the leg rest; The foot should be abducted as far as possible to prevent the fibular head from contacting closely with the leg rest;

2.2.7 When using the restraint belt, it should not be directly tied to the knee joint, but should be fixed on the calf, and the restraint belt should be flat and elastic.