Pressure and separation test of pelvis:
The patient lies in supine position. The doctor puts his two hands respectively on the patient’s anterior superior iliac spines of both sides and presses oppositely the two sides inward, this is called pressure test. The doctor puts his two hands respectively on the patient’s medial sides of iliac crests of both sides, presses and separates them outward and downward, this is called separation test. If the pain of traumatic part gets serious, it is positive, usually indicating pelvic fracture.

Separation test of sacro-iliac joint:
It is also called figure-of-4 test. The patient lies in supine position with the knee and hip of the sick lower limb flexed and his lateral malleolus of the sick lower limb on the knee of the opposite side, being in a cross-legged state. The doctor holds the patient’s iliac crest of the healthy limb with one hand, and presses downward the knee of the sick limb with the other hand. If there appears pain of sacro-iliac joint, it is positive, indicating the disease of sacro-iliac joint.