The radialis indicis artery supplies the radial side of the index finger, the side used for precision pinch against the thumb. Its preservation is critical in radial index finger reconstruction. The index pulp, with its high-density mechanoreceptors for pinch, is supplied by this vessel and the first dorsal metacarpal artery.
| Origin | Radial artery (deep palmar arch) |
|---|---|
| Course | Runs along the radial side of the index finger to supply the radial aspect of the index digit |
| Branches |
|
The first dorsal metacarpal artery flap (kite flap) based on the first dorsal metacarpal artery (a dorsal branch of the radialis indicis) provides sensate dorsal index skin for thumb tip reconstruction. The flap's arc of rotation and its sensory innervation from the dorsal branch of the radial nerve make it ideal for thumb pulp coverage.
First dorsal metacarpal artery flap based on radialis indicis dorsal branch providing sensate thumb tip coverage.
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