Anatomical study of the internal pudendal artery and its perforasome

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K09868
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 56070:Plastic and reconstructive surgery-related
• Research Institution: The University of Tokushima
• Principal Investigator: HASHIMOTO Ichiro 徳島大学, 大学院医歯薬学研究部(医学域), 教授 (70314870)
• Co-Investigator(Kenkyū-buntansha): 山下 雄太郎 徳島大学, 病院, 助教 (10868285) ; 山崎 裕行 徳島大学, 病院, 医員 (20867189) ; 長坂 信司 徳島大学, 病院, 特任助教 (50867190) ; 安倍 吉郎 徳島大学, 大学院医歯薬学研究部(医学域), 准教授 (40467808)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 内陰部動脈 / 皮膚穿通枝 / 穿通枝皮弁 / 坐骨直腸窩

Outline of Final Research Achievements

(1) Three types of branching patterns from the internal iliac artery were observed.
(2) The distribution pattern of skin perforators in the ischiorectal fossa was divided into three groups: those originating from the internal pudendal artery alone (78.5%), those from both the internal pudendal and inferior gluteal arteries (17.5%), and those from the inferior gluteal artery alone (4%). Cases with skin perforators originating from the inferior gluteal artery accounted for 21.5% of all cases.
(3) The mean number of skin perforators in the ischiorectal fossa was 1.7 (1.3 in males and 2.0 in females), significantly more in females than in males, and all cases had skin perforators in the ischiorectal fossa. The skin perforators appeared in the medial to dorsal region of the ischiorectal tuberosity into the ischiorectal fossa.

Free Research Field

形成外科学

Academic Significance and Societal Importance of the Research Achievements

坐骨直腸窩の皮膚穿通枝は安定して存在していることや解剖学的には坐骨結節内側から背側に皮膚穿通枝が存在することを明らかにした。また穿通枝数に性差があることや坐骨直腸窩に下臀動脈由来の穿通枝が存在することを初めて示した。これらの結果は坐骨直腸窩を基部とする穿通枝皮弁の安全な挙上法や手術適応の判断に重要な知見となるため、論文にまとめPlastic Reconstructive Surgery Global Open. 2022 Oct 11;10(10):e4561.に発表した。