Fractures Of The Femoral Neck

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Presentation transcript:

Fractures Of The Femoral Neck Commonest site of fractures in the elderly The typical presentation: Caucasian women in their seventh and eight decades Risk factors :- Note that these are factors for osteoporosis Age : 7th and 8th decade. Sex: female (menopause). Nutritional: malnutrition, alcoholism. Disuse: stroke CVA. Chronic medical disease: DM, TB.

Incidence of Osteoporotic fractures

Pathological Anatomy and Classifications: Mechanism of injury: Fall directly on the greater trochanter In Osteoporotic people less force is needed (catching a toe in the carpet and twisting the hip into external rotation) Preceding stress fracture In young (Fall from a height or RTA) Pathological Anatomy and Classifications: Garden’s Classification: Based on the amount of displacement in the Pre-reduction X-ray (Radiological)

Stage І : Incomplete undisplaced Fracture (impacted or abducted) Stage II : Complete undisplaced Fracture Stage ІІІ : Complete with moderate displacement Stage IV : Complete with severe Displacement Any downstage may progress to upstage if left untreated

Femoral head blood supply come from 3 sources Two problems affect the healing process : 1-Bone ischemia 2-Tardy union 1-Bone ischemia: Femoral head blood supply come from 3 sources Vessles through Ligamentum teres (very scanty). Medullary vessles (will be damaged by the fracture). Capsular vessles (liable for comprssion by the displaced fracture). So the blood supply of femoral head will be decreased (ischemia) Stage І & II better prognosis (Union and viability of femoral head)

classically old female History of minimal trauma 2- Tardy union: A-Bone ischemia B-Flimsy periosteum with no contact with soft tissue C-Synovial fluid prevents clotting of hematoma -Clinical Features: classically old female History of minimal trauma Deformity (short and externally rotated limb) Inability to walk ( may be able to walk if impacted fracture) May not be so obvious:

X-ray: Is there a fracture, and is it displaced? Usually Break is obvious but impacted one can be missed Displacement (abnormal shape of bone outline, mismatch of the trabecular lines)

fracture neck femur may be missed in: Diagnosis: fracture neck femur may be missed in: Stress fracture : no history of trauma. Impacted fracture: the patient may be able to walk. Painless fracture: elderly with minimal trauma usually feel minimal pain. Pathological fracture: patient with metastasis may be fractured during nursing.

Treatment: Treatment depend on the age and fracture type In the emergency unit do skin traction + admitting the patient. No role for conservative treatment aiming for early mobilization. Treatment depend on the age and fracture type

Type 1 & 2 : they are already reduced just do closed internal fixation. Type 3 & 4: closed reduction + internal fixation if failed a- age <60 years ORIF b- age >60 years partial hip replacement (Austin moore)

3-Early activity: ( -From the first day, the pt should sit up in bed or in a chair and encouraged to start walking using crutches or walker.

Complications: early general complications like: 1-DVT 2- pulmonary emobolism 3- pneumonia 4- bed sore Late: avascular necrosis treated by partial or total hip replacement. Non union treated either by (ORIF + bone graft ) or hip replacement. Osteoarthritis if severe symptoms treated by hip replacement.

Intertrochantric fractures Extracapsular Same risk factors of the femoral neck fracture This fracture unites quite easily and seldom cause avascular necrosis Fracture line pass between the greater and lesser trochanter . the stability (classification)of the fracture will depend on the degree of comminution.

Mechanism of injury: Fall directly into the greater trochanter or by indirect twisting The proximal segment tends to displace in varus (coxa vara) Clinical features: Pain follow a fall, the pt. is unable to stand The leg is shorter and more externally rotated than femoral neck #

X-ray: The fracture usually runs diagonally from the greater to the lesser trochanter

Kyle classification

Treatment: These fractures almost always treated by early internal fixation although they unite quiet easily by conservative treatment.

Complications: Malunion: coxa vara (neck shaft angle <135o) Early: same of femoral neck fracture Late: Malunion: coxa vara (neck shaft angle <135o) Delayed union Nonunion: this is rare because it is extra capsular fracture.

Proximal Femoral Fractures In Children Hip fractures rarely occur in children Due to high velocity trauma (falling, RTA) Pathological fractures sometimes occur through a bone cyst or benign tumor Under 2 years, the probability of child abuse should be considered

Between 4 &8 years the ligamentum teres contribute very little to the blood supply Delbet Classifications: Type І: is a fracture-separation of the epiphysis; sometimes the epiphyseal fragment is dislocated from the acetabulum Type II: a transcervical fracture of the femoral neck, the commonest (50%) Type III : is a basal (cervical-trochantric) #, the second most common injury Type IV: Intertrochantric fracture.

Treatment: These # should be treated as a matter of urgency, and certainly within 24 hrs of injury Undisplaced fractures immobilization in a plaster spica Displaced type IV closed reduction, traction and spica immobilization. Type I,II and III fractures treated by closed reduction and then internal fixation with smooth pins or cannulated screws

Complications: 1- AVN. 2- Malunion . (coxa vara) 3- Shortening .

Subtrochanteric Fractures Occurs mostly with relatively trivial injury In an elderly pt. with osteoporosis, osteomalacia or paget’s disease. Blood loss is greater than with femoral neck or trochanteric # making healing slower Fracture healing is slow

Clinical Features: Leg lies externally rotated & short thigh is markedly swollen. movement is painful X-ray: The # is through or below the lesser trochanter & frequently comminuted. Treatment: Open reduction & internal fixation is treatment of choice

Early Shock vascular injury Late Malunion. Delayed union Non union Complications: Early Shock vascular injury Late Malunion. Delayed union Non union