flexor tendon zones
Anatomical classification system dividing the hand and forearm into regions for flexor tendon injury management.
Full Definition
The flexor tendon zone system is a standardized anatomical classification that divides the hand and forearm into five distinct zones (I-V) to guide surgical treatment and predict outcomes for flexor tendon injuries. Zone I extends from the fingertip to the insertion of flexor digitorum superficialis. Zone II, known as 'no man's land,' spans from the A1 pulley to the superficialis insertion where both flexor tendons lie in close proximity within tight fibro-osseous tunnels. Zone III covers the lumbrical and hypothenar region, Zone IV involves the carpal tunnel, and Zone V encompasses the forearm. Each zone presents unique surgical challenges and rehabilitation requirements.
Usage
Usage note: Always specify zone number (I-V) when documenting flexor tendon injuries.
In Context
- "The laceration involved Zone II flexor tendons requiring immediate surgical repair." — Emergency surgery consultation
- "Zone II flexor tendon repairs have historically poor outcomes due to adhesion formation." — Surgical literature review