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The surgical anatomy of the dorsal carpal branch of the ulnar artery: basis for a neurovascular dorso-ulnar pedicled flap

Anatomie chirurgicale de la branche carpienne dorsale de l'artère ulnaire. Bases anatomiques d'un lambeau pédiculé neurovasculaire dorso-ulnaire

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Summary

In order to design a neurovascular flap from the dorso-ulnar aspect of the midhand for pedicled transfer to adjacent or distant locations, the surgical anatomy of the dorsal carpal branch of the ulnar artery (DCBUA) was studied in 12 cadavers. The DCBUA was identified in all specimens. It originates from the ulnar artery 1.6 to 4.4 centimeters proximal to the ulnar styloid, passing deep to the flexor carpi ulnaris tendon, and spirals superficially to the extensor retinaculum around the ulnar border of the wrist. Its terminal branches supply an undetermined area of skin overlying the ulnar metacarpals and the ulnar hypothenar region, either by direct cutaneous supply (3/12 specimens) or by septo-cutaneous perforators (8/12 specimens). The DCBUA is closely related to the dorsal sensory branch of the ulnar nerve, with which it supplies a common neurovascular territory.

Résumé

Afin de déterminer les limites d'un lambeau pédiculé à partir du versant dorso-ulnaire de la région métacarpienne, l'anatomie chirurgicale de la branche carpienne dorsale de l'artère ulnaire a été étudiée sur 12 cadavres. La branche carpienne dorsale de l'artère ulnaire (DCBUA en abrévviations anglaises), a été identifiée chez tous les spécimens. Elle naît de l'artère ulnaire à une distance variant de 1,6 à 4,4 cm au-dessus du processus styloïde, passe en arrière du tendon du fléchisseur ulnaire du carpe, et contourne superficiellement le bord ulnaire du poignet pour gagner le rétinaculum des extenseurs. Ses branches terminales vascularisent une aire cutanée encore mal définie, qui recouvre les métacarpiens ulnaires et la région hypothénarienne, soit par des branches cutanées directes (3 cas sur 12), soit par des perforantes septo-cutanées (8 cas sur 12). La DCBUA est en rapport étroit avec la branche sensitive dorsale du nerf ulnaire, avec laquelle elle assure la prise en charge d'un territoire neuro-vasculaire commun.

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Oppikofer, C., Büchler, U. & Schmid, E. The surgical anatomy of the dorsal carpal branch of the ulnar artery: basis for a neurovascular dorso-ulnar pedicled flap. Surg Radiol Anat 14, 97–101 (1992). https://doi.org/10.1007/BF01794883

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