Avascular Necrosis (R) Flashcards
1
Q
Which is one of the commonest sites for AVN?
A
Hip joints
2
Q
Pathogenesis of AVN?
A
No blood supply to femoral head
3
Q
Aetiology of AVN?
A
Primary: idiopathic
Secondary: Alcohol, steroids, hyperlipidaemia, thrombophilia
4
Q
Signs/symptoms of AVN?
A
Groin pain
5
Q
Investigations for AVN?
A
MRI: Early cases can show
X-ray: late cases
6
Q
What would an x-ray show?
A
- Patchy sclerosis of the weight bearing area of femoral head
- Lytic zone underneath formed by granulation tissue form attempted repair
- Hanging rope sign on x-ray
- Femoral head may collapse
7
Q
Treatment of AVN if detected pre-collapse?
A
Drill holes made up the femoral neck & into abnormal area in the head
8
Q
Treatment of AVN if collapse has occured?
A
THR
9
Q
What does drilling holes in the femoral neck and into abnormal area in head do?
A
- Relieves pressure
- Promotes healing
- Prevents collapse
