POSTERIOR DISLOCATION OF HIP
POSTERIOR DISLOCATION OF THE HIP
- Head of the femur is pushed out of the acetabulum posteriorly.
- Associated with a chip fracture of the posterior lip of the acetabulum, called a fracture-dislocation.
DIAGNOSIS
Clinical features:
- H/O severe trauma followed by pain, swelling and deformity (flexion, adduction and internal rotation).
- Associated with a shortening of the leg.
- One may be able to feel the head of the femur in the gluteal region.
- The injury is sometimes missed, especially when associated with other more obvious injuries such as fracture of the shaft of the femur.
Radiological features:
- The femoral head is out of the acetabulum.
- The thigh is internally rotated so that the lesser trochanter is not seen.
- Shenton’s line is broken.
- Bony chip from the posterior lip of the acetabulum or from the head.
- CT scan necessary, in cases where an associated fracture is suspected.
TREATMENT
- Reduction of a dislocated hip is an emergency.
- Manipulation under general anaesthesia.
- Open reduction
COMPLICATIONS
- Injury to the sciatic nerve
- Avascular necrosis of the femoral head
- Osteoarthritis
- Myositis ossificans
Exam Important
- Position of limb in posterior dislocation of hip is Flexion, adduction & internal rotation.
- Deformity of posterior dislocation of hip is Flexion, adduction, Internal rotation.
- Flexion, adduction and internal rotation is characteristic posture in Posterior dislocation of hip joint.
- Sciatic nerve palsy occur Posterior dislocation of hip joint.
- Vascular sign of Narath is noticed in Posterior dislocation of hip.
- Dashboard injury results in Posterior dislocation of hip.
Don’t Forget to Solve all the previous Year Question asked on POSTERIOR DISLOCATION OF HIP
