Ulnar Vein
Ulnar Veins are deep veins of the forearm that arise in pairs on both forearms. They are Venae Comitantes (accompanying Veins) of the Ulnar Artery.
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COURSE AND POSITION
- Ulnar Veins arise from the Deep Palmar Venous Arch on its Ulnar side.
- An Anterior and a Posterior Ulnar Vein arises from the Arch and follow the Ulnar Artery anteriorly and posteriorly, respectively.
- They anastomose (join) freely with each other on their way.
- Anterior and Posterior Veins join after passing the elbow joint and form Common Ulnar Vein.
- Common Ulnar Vein ends by joining the Median Cubital Vein and later forming Brachial Vein.
FUNCTION AND SIGNIFICANCE
- Ulnar Veins drain the blood from medial aspect of hands and fingers through Palmar Venous Arch.
- They also drain the medial aspect of the forearm.
- They provide collateral (alternate) circulation in case of trauma to other vessels nearby.
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