synonyms: Intrinsic Minus Hand
Claw Hand ICD-10
Claw Hand ICD-9
Claw Hand Etiology / Epidemiology / Natural History
- Etiology is median/ulnar nerve injury: ulnar nerve palsy, cubital tunnel syndrome, ulnar tunnel syndrome, median nerve palsy, Volkmann's ischemic contracture, leprosy (Hansen's disease, Charcot-Marie-Tooth disease (hereditary motor-sensory neuropathy), compartment syndrome of the hand
- musculotendinous weakness or contracture leads to MCP hyperextension and IP joint flexion
Claw Hand Anatomy
- radial two lumbrical are innervated by median nerve, ulnar two by ulnar nerve.
- four dorsal interosseous which are abductors (DAB) with insertions on index, middle both radial and ulnar and ring fingers. 3 palmar adductors for index, ring and small
- hypothenar muscles are innervated by ulnar n
- thenar muscles except deep head of FPB(ulnar) and Adductor policis are innervated by median nerve
Claw Hand Clinical Evaluation
- MCP hyperextension with PIP and DIP flexion.
Claw Hand Xray / Diagnositc Tests
- Hand films generally are normal.
Claw Hand Classification / Treatment
- operative treatment is directed at preventing MCP hyperextension either by passive tenodesis or an active tendon transfer.
Claw Hand Associated Injuries / Differential Diagnosis
Claw Hand Complications
- Loss of function use of hand
Claw Hand Follow-up Care
Claw Hand Review References
- Greens Operative hand surgery