- 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.