Outer Arrangement of the Uterine Blood Flow Channels

Description

Circumferential vascular channels course along the outer uterine wall, with the uterine artery approaching the cervix at the level of the lateral fornix and ascending in a tortuous path within the broad ligament before giving off arcuate branches that run transversely through the myometrium. Medially, radial arteries project from the arcuate system toward the endometrium, where they continue as straight arteries to the basalis and spiral arteries to the functionalis. Superiorly, anastomoses link the uterine artery with the ovarian artery near the uterine cornu and fundus, while inferiorly the descending cervical and vaginal branches communicate with the vaginal arterial plexus adjacent to the upper vagina. Collateral pathways around the uterus drive real operative decisions. During total hysterectomy or cesarean delivery, the uterine artery crosses superior to the ureter near the cervix (water under the bridge), and bleeding often persists if only a single pedicle is controlled because ovarian and vaginal contributions can backfill the uterine arcade. Uterine artery ligation, stepwise uterine devascularization, and internal iliac artery ligation for postpartum hemorrhage all hinge on understanding where these anastomoses sit relative to the cervix, uterine isthmus, and fundus. Good landmarks. Use this artwork for OB-GYN teaching on uterine blood supply, endometrial perfusion, and the vascular basis of abnormal uterine bleeding, and for surgical atlases covering hysterectomy, myomectomy, and uterine-sparing hemorrhage control techniques. It also supports radiology and interventional content on uterine artery embolization for fibroids and adenomyosis, where the target is the uterine arterial tree and its collateral inflow from ovarian and vaginal sources. Anatomical accuracy verified by SciePro's Medical Advisory Board.