Correct answer: C

Analysis: Hippocrates method: the patient lies on his back, the surgeon is on the affected side, holds the wrist of the affected limb with both hands, and places the heel on the affected side For the armpit, use steady and continuous traction with both hands to push the humeral head outward with the heel while rotating it and adducting the upper arm to restore the position.

A sound can be heard during reset

. C

. Posterior and superior dislocation of the hip joint, that is, posterior dislocation (hip joint flexion, adduction, and internal rotation deformity) D

. Anterior and inferior dislocation of the hip joint, that is, anterior dislocation (hip joint flexion , abduction, external rotation deformity)

. Dugas' sign: When a normal person's elbow is close to the chest wall, the palm of the hand can touch the opposite shoulder

.

When there is anterior dislocation of the shoulder joint, the upper limb on the affected side flexes the elbow. When the elbow is close to the chest wall, the palm of the hand cannot touch the acromion of the unaffected side. If the acromion of the unaffected side is touched with the palm of the hand, the elbow cannot be close to the chest wall of the affected side. This is a positive < /p>