- See:
-
Arteries of the Upper Limb:
-
Vascular Anatomy of Scaphoid:
-
Vascularity of the Lunate:
- Discussion:
- vascular supply of wrist is obtained thru
radial,
ulnar, anterior interosseous arteries and the
deep palmar arch;
-
extraosseous arterial pattern:
- formed by anastomotic network of dorsal and palmar arches connected longitudinally at their medial &
lateral borders by radial & ulnar artery;
-
palmar transverse arches include:
- radiocarpal, intercarpal, &
deep palmar arch;
-
palmar radiocarpal arch:
- provides blood supply to palmar surface of lunate &
triquetrium;
- radial and ulnar recurrent arteries supply distal carpal row;
- Pathology of Vascular Supply to the Arch:
- pathology of intrinsic blood supply to carpal bones is related to AVN following trauma;
- scaphoid,
capitate, and 20% of lunate are supplied by a single artery and are therefore are at risk for avascular necrosis;
-
trapezium, triquetrum,
pisiform, & 80% of lunate receive nutrient arteries thru two non articular surfaces;
- these bone have consistent intraosseous anastomosies & as might be expected, they rarely develop avascular necrosis;
- trapezoid and
hamate lack intraosseous anastomosis & following frx can have asvascular fragments;
The blood supply of the human distal radioulnar joint and the microvasculature of its articular disk.
