- See:
-
Blood Supply to the Wrist:
-
Kienbock's Disease:
- Discussion:
- majority of lunates have both dorsal & palmar vessels & are thus as
well-vascularized as the other carpal bones;
- neither single intraosseous nor extraosseous disruption alone will cause
avascular necrosis in these bones because of the rich external and
internal anastomoses;
- lunate blood supply may be jeparidized by dorsal approaches to wrist, but
perfusion from palmar radiocarpal arch is adequate in most cases;
- usually there is, an rich anastomotic network fed by multiple dorsal &
palmar vessels;
-
in < 20% of pts: a
single vessel enters palmar surface and branching with
in the bone to provide the sole supply;
- w/ this pattern, pts w/ in severe hyperextension injuries or dislocations may
have a disruption of palmar nutrient vessels as they enter the bone;
