ACCESSORY CEPHALIC VEIN Meaning and
Definition
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The accessory cephalic vein is a superficial vein that runs along the lateral aspect of the upper limb. It is considered a variant vein as it is not present in all individuals and is not part of the usual venous anatomy.
The accessory cephalic vein typically originates from the dorsal venous network on the dorsum (back) of the hand. From there, it courses proximally and laterally along the forearm and the lateral aspect of the upper arm. It usually extends upwards, paralleling the course of the cephalic vein, and terminates by draining into the cephalic or the axillary vein.
Although the accessory cephalic vein can be present on both sides of the upper limb, it is more commonly observed on the radial (thumb) side. The vein may be palpable or visible under the skin due to its superficial location.
In clinical practice, the accessory cephalic vein is important to consider during venipuncture or when planning surgical procedures involving the upper limb. Its presence can impact the choice of venous access, particularly when the usual veins, such as the cephalic or basilic veins, are not accessible or suitable for procedures such as blood sampling, intravenous therapy, or arterial bypass surgery.
Overall, the accessory cephalic vein is an additional superficial vein that can assist in venous access options in the upper limb and may contribute to the venous drainage of the hand and forearm.
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