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Technical
IVT
extensor tendon zones
Anatomical regions (I through VIII) used to classify extensor tendon injuries based on location from fingertip to forearm.
Full Definition
The extensor tendon zone system divides the dorsal aspect of the hand and forearm into eight distinct zones for injury classification and treatment planning. Zone I covers the DIP joint area (mallet finger injuries), Zone II the middle phalanx, Zone III the PIP joint (boutonniere injuries), and so forth proximally. Each zone has specific rehabilitation protocols and surgical considerations, making accurate zone identification essential for proper documentation and patient care.
Usage
Usage note: Use Roman numerals (I-VIII) when specifying zones. Do not confuse with flexor tendon zones, which use different numbering.
In Context
- "The laceration involved extensor tendon zones II and III, requiring primary repair with early mobilization." — Operative report
- "Zone VI extensor tendon injuries often require tendon transfers due to the muscle-tendon junction involvement." — Hand surgery textbook
Also known as
dorsal tendon zones
extensor zones
Contrasted with
flexor tendon zones
Don't confuse with
flexor tendon zones
nerve injury zones