Finger Injuries
A 32-year-old man presents 2 days after jamming his finger playing basketball. He has a swollen PIP joint with bruising over the dorsum. He cannot actively extend the PIP joint but can passively extend it fully. When asked to extend against resistance, the PIP remains flexed while the DIP hyperextends. Regarding boutonniere deformity:
Mark each as TRUE or FALSE
Boutonniere deformity is caused by disruption of the central slip of the extensor tendon at the PIP ...
The pathomechanics involve central slip rupture allowing the lateral bands to sublux volarly below t...
Boutonniere deformity affects the DIP joint primarily; the lateral bands migrate dorsally; DIP flexi...
The Elson test helps diagnose acute central slip injury: with the PIP flexed 90 degrees over a table...
Acute closed boutonniere is treated with PIP extension splinting (holding PIP in extension while all...
Answer the questions to see explanations
Click T (True) or F (False) for each option