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Innominate variant artery in the first web space.

Jakub Miletin1, Andrej Sukop2, Vaclav Baca3

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|April 29, 2020
PubMed
Summary

A rare accessory artery variation on the dorsal hand was identified in 11.93% of cases. This study details its anatomy, classifies four types, and proposes a new name: the superficial dorsal branch of the radial artery.

Keywords:
Anatomical variantAnatomical variationArteryFirst web spaceHandRadial artery

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Area of Science:

  • Anatomy
  • Vascular anatomy
  • Human anatomy

Background:

  • Hand anatomy exhibits numerous variations.
  • Detailed descriptions of radial artery branches are lacking.
  • An accessory artery on the dorsal interosseus primus muscle is frequently observed.

Purpose of the Study:

  • To determine the incidence and diameter of the accessory artery.
  • To provide a detailed description of this arterial variation.
  • To propose a systematic name aligned with Terminologia Anatomica.

Main Methods:

  • Dissection of 503 hand samples (133 donors, 237 cadavers).
  • Measurement of arterial diameters.
  • Statistical analysis including Shapiro-Wilk, Mann-Whitney U, and ANOVA tests.

Main Results:

  • The accessory artery variation was found in 11.93% of cases.
  • Four types of branching patterns were identified.
  • Types 1-3 formed an anastomosis with the superficial palmar arch; Type 4 did not.

Conclusions:

  • The incidence and detailed anatomy of this radial artery variation were established.
  • A new systematic name, 'superficial dorsal branch of radial artery,' is proposed.
  • This nomenclature can enhance understanding and clinical application.