Pulp Space of the Finger

pulpa digiti

The pulp space is the soft pad of the fingertip, in front of the distal phalanx. It is divided into many small compartments by fibrous septa that run from the skin to the bone, filled with fat and sweat glands, and is closed proximally at the distal flexion crease.

Anatomical Data

Boundaries & Contents

Location	Palmar side of the tip of each finger and thumb.
Boundaries	Skin of the fingertip superficially Distal phalanx deep Distal flexion crease proximally (septum closes the space) Fibrous septa from skin to periosteum within
Contents	Fat Sweat glands Terminal branches of the digital arteries and nerves

Biomechanics

Function & Actions

Provides a firm, sensitive cushion for grip and touch.

Clinical Relevance

Clinical Notes

Because the septa make the pulp a closed space, infection here (a felon) causes intense, throbbing pain as pressure rises, and can cut off blood to the distal phalanx and cause bone infection. The digital arteries supplying the diaphysis pass through the pulp. Drainage is by a lateral or central incision avoiding the tactile surface.

Pathology

Common Injuries & Conditions

Felon

A deep infection of the fingertip pulp, usually after a puncture wound, causing severe throbbing pain and tense swelling that needs prompt drainage.

Pulp Crush Injury

Crush of the fingertip compresses the septated pulp and often goes with a tuft fracture of the distal phalanx.

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