- See:
-
Frx Dislocations of the Hip:
-
Avascular Necrosis of the Femoral Head;
- Discussion:
- overall incidence between 5-40%;
- if reduction is performed w/in 6 hours, incidence of AVN will be less than 10%;
- in the study by McKee et al 1998, the occurance of AVN was 26% with a mean time to reduction of 15.3 hours;
- time after dislocation when the dx of of AVN is variable;
- AVN occurs 2-5 yrs after posterior dislocation of the hip;
- typically, period of 3-4 months is required following dislocation before sufficient atrophy is present
in surrounding bone to contrast living and dead bone on x-ray for the purpose of dx;
Changes on magnetic resonance images after traumatic hip dislocation.
Distinguishing avascular necrosis from segmental impaction of the femoral head following an acetabular fracture: preliminary report.
GS Gruen et al.
J. Orthop. Trauma.
Vol 2(1) 1988. p 5-9.
Irreducible fracture dislocation of the hip: a severe injury with a poor prognosis.
MD McKee et al.
J. Orthop Trauma.
Vol 12. No 4. p 223-229.
