Joint capsule relaxation

Introduction The joint capsule is a connective tissue capsule that surrounds the two bone ends of the joint and seals the joint cavity. Congenital dislocation of the hip is one of the most common congenital malformations in children. Later dislocation is more common. It is already present at birth. The lesions involve the acetabulum, musculoskeletal, joint capsule, ligament and nearby muscles, causing joint relaxation. Subluxation or dislocation.

Cause

The etiology of congenital dislocation of the hip has not yet been fully elucidated. However, there are three main causes of congenital dislocation of the hip: genetic factors, ligament relaxation factors, body position and mechanical factors.

an examination

Related inspection

Arthroscopy, bone and joint, soft tissue, CT examination, joint examination

(1) Limited joint activity

Congenital dislocation of the hip in childhood is usually characterized by painless and unrestricted joint activity. In the baby and neonatal period, however, there is a temporary joint dysfunction with a certain fixed posture. The typical symptoms are that the child's limbs are flexed and do not dare to straighten, the activity is worse than the healthy side, and the force is weak. When the lower limbs are pulled, they can be straightened, but after the loose hand, they are flexed. A few infants have external rotations, and the outer booth or outer booth. The lower limbs are in a cross position, and even the hip joint is completely stiff. A few children have crying when pulling the lower limbs.

(two) limb shortening

Unilateral limb dislocation is common in patients with unilateral hip dislocation.

(three) other common symptoms

There is asymmetry of the labia majora, and the skin wrinkles on the buttocks, inner thighs or fossa are increased, deepened or asymmetrical, the perineum is widened, and sometimes there is a "snap" or bouncing feeling when the affected limb is pulled.

Differential diagnosis

Joint capsule injury: Joint capsule injury is a local swelling, pain, ecchymosis, limited limb activity and other symptoms caused by external force, pressure, collision or inversion, weight bearing, and twisting.

The saclike protrusion of the wrist: the saclike protrusion of the wrist is one of the symptoms of the ganglion cyst. The sacral cyst (thecal cyst) is the most common type of mass on the dorsal aspect of the wrist. It can also occur on the joint capsule and tendon sheath in other parts of the body.

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