Vascular Anatomy of Scaphoid   

- 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 
           - 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.

Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Wednesday, May 30, 2012 3:01 pm