The dorsal carpal venous network (dorsal venous plexus of the hand) is the superficial venous plexus on the dorsum of the hand, formed by the dorsal digital veins and draining into the cephalic vein laterally and the basilic vein medially. It is the most visible and accessible venous network for intravenous cannulation and phlebotomy in clinical practice.
The dorsal carpal venous network is the primary site for peripheral intravenous cannulation and blood sampling in clinical medicine. Prominent visible dorsal hand veins are targeted for IV access when antecubital veins are unavailable. In chronic kidney disease patients requiring arteriovenous fistula creation, preservation of forearm and hand veins is critical — blood sampling from the ipsilateral forearm and hand is avoided to protect future fistula access sites. Dorsal hand vein distension during venipuncture is enhanced by dependent positioning and gentle fist clenching.
Patients with chronic kidney disease approaching renal replacement therapy must have their non-dominant forearm and hand veins protected from venipuncture and cannulation; repeated dorsal carpal venous network cannulation thromboses the cephalic and basilic tributaries required for a functioning Brescia-Cimino fistula at the wrist or antecubital fossa.
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