Richards R S, Dowdy P, Roth J H
Hand and Upper Limb Centre, St. Joseph's Health Centre, London, Ontario, Canada.
J Hand Surg Am. 1993 Sep;18(5):888-92. doi: 10.1016/0363-5023(93)90061-7.
Three cases in which the ulnar artery was palmar to the palmaris brevis muscle at the level of the wrist are described and the results of a cadaveric study are presented. The anomaly was confined to the level of Guyon's canal with a normal position of the artery proximally in the forearm and distally in the palm. In spite of its superficial location, the artery was patent in all patients and no symptoms referable to the ulnar artery were present. The ulnar nerve was found dorsal to the palmaris brevis in Guyon's canal in all three patients. An accessory muscle was found in one patient, but no other anatomic anomalies were seen. A cadaveric study of 43 limbs revealed a similar anomaly of the ulnar artery in 1 cadaver. In the presence of this anomaly the ulnar artery may be at increased risk during surgical exploration of Guyon's canal. Exposure of the artery in the forearm prior to exploration of Guyon's canal is recommended.
本文描述了3例尺动脉在腕部水平位于掌短肌掌侧的病例，并展示了一项尸体研究的结果。该异常局限于Guyon管水平，动脉在前臂近端和手掌远端位置正常。尽管动脉位置表浅，但所有患者的动脉均通畅，且无尺动脉相关症状。在所有3例患者中，发现尺神经在Guyon管内位于掌短肌背侧。1例患者发现有副肌，但未见其他解剖异常。对43条肢体的尸体研究发现1具尸体存在类似的尺动脉异常。存在这种异常时，在对Guyon管进行手术探查时，尺动脉可能面临更高风险。建议在探查Guyon管之前先暴露前臂的动脉。
