高位起始橈動脈：中西部剖検標本における頻度と形態学的特徴
Umair Naseem1, Michael Pollack1, Khalid Khan1
1Anatomy, A.T. Still University, Kirksville, USA.
Cureus
|January 16, 2026
まとめ
中西部剖検例の上腕動脈（BA）の奇形例の11.5%に高位起始橈動脈（RA）が認められた。これらの動脈分岐異常の理解は、医用手技にとって極めて重要である。
科学分野:
- 解剖学
- 血管生物学
- 医用画像処理
背景:
- 上腕動脈（BA）は橈骨動脈（RA）と尺骨動脈に二分岐し、前腕と手に栄養を供給する。
- 上腕動脈（BA）分岐部の解剖学的奇形は、臨床手技に影響を与える可能性がある。
- 動脈のランドマークの標準的な命名法は一貫性がない場合がある。
研究 の 目的:
- 高位起始橈骨動脈（RA）の頻度と形態学的特徴を決定すること。
- 中西部剖検標本における上腕動脈（BA）分岐部の奇形を調査すること。
主な方法:
- 31例の中西部剖検例における上腕動脈（BA）分岐部の評価。
- 高位起始橈骨動脈（RA）の起始部、走行、長さを特徴づけること。
- 写真による記録。
主要な成果:
- 解析対象は61の上肢であった。
- 腋窩動脈から起始する上腕動脈（BA）分岐部の奇形が7例（11.5%）認められた。
- 右（57.1%）および左（42.9%）の上肢の両方で奇形が観察された。
結論:
- 上腕動脈（BA）の10分の1以上に分岐パターンの奇形が見られる。
- これらの解剖学的奇形に対する認識は、冠動脈造影や経皮的インターベンションなどの手技にとって不可欠である。
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