Wolfe's Classification of Trigger Finger
Grade Type Description
I Pre-triggering Pain in the palm; possible history of catching, but not seen on examination; tenderness over A1 pulley
II Active Patient demonstrates catching but can actively extend the finger
III Passive Patient demonstrates locking that requires passive extension (IIIa); may be unable to flex the finger (IIIb)
IV Contracture A locked trigger finger with a fixed flexion contracture of the proximal interphalangeal joint

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