Left Superficial Palmar Arterial Arch (Arcus palmaris superficialis sinister)
Educational content only — not medical advice.
Anatomy
The left superficial palmar arterial arch is an important vascular arcade situated deep to the palmar aponeurosis and superficial to the long digital flexor tendons. Formed primarily by the direct continuation of the ulnar artery and completed laterally by the superficial palmar branch of the radial artery, it gives off three common palmar digital arteries to supply the fingers.
Clinical notes
The Allen test evaluates the patency and collateral flow of the superficial palmar arch prior to radial artery cannulation or coronary artery bypass grafting; deep lacerations of the palm risk vigorous pulsatile bleeding from this arch.
Related structures
Educational references
FAQ
What is the role of the Left Superficial Palmar Arterial Arch?
The left superficial palmar arterial arch is an important vascular arcade situated deep to the palmar aponeurosis and superficial to the long digital flexor tendons. Formed primarily by the direct continuation of the ulnar artery and completed laterally by the superficial palmar branch of the radial artery, it gives off three common palmar digital arteries to supply the fingers.
Why is the Left Superficial Palmar Arterial Arch clinically important?
The Allen test evaluates the patency and collateral flow of the superficial palmar arch prior to radial artery cannulation or coronary artery bypass grafting; deep lacerations of the palm risk vigorous pulsatile bleeding from this arch.
Source & license
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