Congenital Dislocation Of The Hip CDH






Refers to a malposition of the femur in the acetabulum. the head of the femur is usually dislocated postero-superiorly. dislocation may be either partial or complete and may be either unilateral or bilateral.


Congenital Dislocation Of The Hip CDH
Congenital Dislocation Of The Hip CDH


Aetiology:

1. Unknown.

2. Possible causes :
- abnormal development of the joint caused by fatal position or genetic factors.

- Hormonal factors.

- Environmental factors such as breech delivery.

Incidence: more common in females than in males.


Clinical manifestations :

- May not be observed until 1-2 month of age.

- Asymmetry of gluteal folds with deeper creases apparent on the affected side.

- Limited ability to abduct the hip when the infant is lying on his back with his knee and hips flexed to 90 degrees.

- Trendelenburg's sign: pelvis drops on the normal side if the child stands on his abnormal leg.

- Leg length inequality with unilateral complete dislocation.

- Delayed walking.

- Limp, waddling gait with bilateral dislocation.


Treatment :

- Varies with age and extent of the defect.

- Early stages: reduction with gentle manipulation, splinting the hip in abduction by means of double or triple diapers.

- Later stages: preliminary traction, closed or open reduction with immobilization in a hip Spica cast.


Care of child in spica cast :

- Prepare the child for application of the cast.

- Observe for complications resulting from the pressure of the cast, discolouration or cyanosis, impaired movement, loss of sensation, oedema, temperature changes or absent pedal pulses.

- Provide good skin care, inspect skin for a sign of irritation, bathing if possible and good skin massaging.

- Prevent the skin around the edges of the cast from being excoriated.

- Prevent urine and faeces from soiling the cast.

- Plans for short periods of muscle exercise every day.

- Have the child breath deeply at intervals.

- Turn the child every 2 hours.



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