1, the basic method of rehabilitation after hip replacement ① ankle active dorsiflexion and plantarflexion, isometric contraction of the lower limb muscles, squeeze the deep blood vessels, promote blood circulation, reduce postoperative lower limb edema, prevent the formation of deep venous thrombosis. ② Quadriceps, N cord muscle, gluteus maximus, gluteus medius muscle isometric contraction exercises. ③ Hip straightening exercises: flex the opposite hip and knee joints, and do active straightening of the hip joint on the operative side to fully stretch the hip flexors and the anterior part of the joint capsule. Hip flexion exercises: flex the knee joint, slide the heel toward the hip, hip flexion should not be more than 70°. ⑤ Upper limb muscle strength exercises: the purpose is to restore the upper limb strength and to use crutches better. 2.What are the positions in which the hip joint is easily dislocated? How to avoid? ①Hip joint internal retraction, internal rotation, semi-flexion position; this position is the most likely to dislocate the prosthesis impingement. Should avoid knees together, feet apart when the body tilted to the side of the position. Hip overflexion, internal retraction, internal rotation: the prosthesis is prone to impingement dislocation. Avoid sitting too low. 3, the correct posture of turning over after hip replacement Straighten the hip joint on the operative side and keep it in neutral position; straighten the upper limb on the same side, with the palm of the hand behind the greater trochanter; turn over to the operative side to prevent the affected limb from being externally rotated.