- See:
Blood Supply to the Wrist:
- Discussion:
- scaphoid receives majority of its blood supply via dorsal vessels at or just distal to waist area;
- these vessels perfuse the proximal pole in a retrograde fashion;
- most important vascular branches of
radial artery enter scaphoid thru foraminae along its dorsal ridge;
- it supplies 70-80% of bone, including entire proximal pole;
- second group of vessels, arise from palmar & superficial palmar branches of radial artery & enter carpal
scaphoid in region of its distal tubercle;
- it perfuses distal 20-30 % of bone, including tuberosity;
- Proximal Scaphoid:
- proximal two thirds to three fourths of scaphoid is supplied by vessels entering dorsal surface;
- vessels enter thru dorsal ridge in 79 %, distal to waist in 14 %, & proximal to waist in 7 %;
- vessels branched soon after entering bone and then coursed proximally and palmarly as far as the subchondral bone;
- Distal Scaphoid:
- tubercle & distal 20-30 % of scaphoid are supplied by palmar vessels;
- in few specimens, two or three vessels enter tip of tubercle & penetrated the bone as far as waist;
- there were no anastomoses between the dorsal and palmar vessels in any of the specimens;
The vascularity of the scaphoid bone.
