Blood Vessels of the Hand

Description

Running distally from the forearm into the palm, the red arterial system can be read as the radial and ulnar arteries approaching the wrist on the lateral (radial) and medial (ulnar) sides, then feeding the superficial and deep palmar arches. Common palmar digital arteries branch anteriorly from the arches and divide into proper palmar digital arteries along the sides of each finger, continuing to terminal arcades at the distal phalanges. Blue venous channels accompany this distribution with paired deep veins (venae comitantes) alongside the arteries and a more superficial dorsal venous network draining proximally toward the cephalic vein laterally and basilic vein medially. Small arterioles and capillary beds are implied throughout the digits, densest at the fingertip pulp. Palmar arch anatomy is where hand perfusion is won or lost. Radial artery cannulation at the wrist, harvesting the radial artery for coronary bypass, or lacerations near the thenar eminence all hinge on whether the superficial palmar arch is complete and how reliably the ulnar artery can backfill the thumb and index territory. One cut, big consequences. This vascular map also supports teaching around Allen test rationale, digital ischemia after crush or ring constriction, and why epinephrine use in digital blocks is approached with attention to end-artery risk in compromised circulation. Hand surgeons, emergency physicians, and anatomists can drop this figure into lectures on upper limb circulation, microvascular repair, and safe approaches to the volar wrist and palm, while publishers will find it suited to atlas plates and patient-facing explanations of arterial versus venous bleeding. It also pairs well with chapters on peripheral arterial disease, Raynaud phenomenon, and flap planning for fingertip reconstruction. Anatomical accuracy verified by SciePro's Medical Advisory Board.