Avascular necrosis
definition
aetiology
non-traumatic
traumatic
steroids
Gaucher's disease
incidence
pathophysiology
clinical
diagnosis
MRI
pathologic process resulting from interruption of blood supply to the bone
Xray
femoral head lucency
subchondral sclerosis
subchrondral collapse
femoral head flattening
joint space narrowing
symptomatic but N xray
common
failure of blood supply to the femoral head
final common pathway of traumatic or nontraumatic factors that compromise the circulation to the femoral head
femoral head ischaemia results in the death of marrow and osteocytes and usually results in collapse of the necrotic segment.
history
exam
asymptomatic
pain
limited ROM
groin
exacerbated by WB
relieved by rest
limited and painful PROM
esp abd
painful resisted hip flexion
subluxation
dislocation
displaced NOF #
intravascular coagulation
coagulation secondary to
extravascular compression
marrow fat enlargement
vessel wall injury
chemotherapy
radiation
thromboembolic event
fat emboli
SLE
ischaemic insult
SUFE
infection
ancillary
haemoglobinopathies
bone scan
treatment
non-surgical
surgical
prophylactic
core decompression
bone grafting
reconstructive
THJR
resurfacing arthroplasty
complications