What are the main fascial spaces of the hand?

The main fascial spaces are the midpalmar space, thenar space, and pulp spaces of the digits, each with distinct anatomical locations and clinical significance.

How does infection spread to the midpalmar space?

Infection typically spreads from the ulnar bursa. Pus collects in the space and can exit through lumbrical canals into the medial web spaces, requiring drainage via incisions in those areas.

What is the clinical relevance of the thenar space?

The thenar space is prone to infection, often from the radial bursa or synovial sheath of the index finger. Drainage is performed via an incision in the first web space to manage pus accumulation.

What is a pulp space infection (felon) and why is it serious?

A pulp space infection, or felon, is a common abscess in the fingertip that increases pressure, causing severe pain and risking necrosis of the distal phalanx. Drainage uses lateral incisions to preserve tactile sensation.

What is the space of Parona and how is it involved in infections?

The space of Parona is a forearm fascial interval beneath long flexor tendons. Infections often result from neglected ulnar bursa infections, with pus accumulating beneath the flexors and requiring drainage via distal forearm incisions.

How are the midpalmar and thenar spaces anatomically separated?

They are separated by the intermediate palmar septum, which attaches to the third metacarpal. The midpalmar space is medial to this septum, while the thenar space is lateral.

What structures form the boundaries of the pulp spaces in the fingers?

The pulp spaces are bounded superficially by the skin and superficial fascia, and deeply by the distal two-thirds of the distal phalanx. They contain fatty tissue divided by fibrous septa.

Palmar Spaces – Thenar, Midpalmar & Pulp Anatomy

❓ Frequently Asked Questions