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Flashcards in Mock Exam 2 Deck (10)
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1

What is the flexor retinaculum?

A fibrous band on the palmar side of the hand near the wrist. It arches over the carpal bones, covering them and forming the carpal tunnel.

2

What is a boutonniere deformity?

Characterized by PIP flexion and DIP extension

3

How does a boutonniere deformity occur?

Rupture of the extensor tendon or central slip, so the finger can't perform active extension.

4

What are the three componenets of a Boutonniere deformity?

Central slip rupture
Triangular ligament attenuation
Lateral Band Volar migration

5

What are the four stages of a Boutonniere deformity?

Injury to central slip leading to lack of extension of PIP
Triangular ligament, lateral band separation, and volar migration causing flexion force on the PIP and extension on DIP
Retinacular ligament contracture
PIP and DIP capsular contracture

6

What is the treatment for actue Boutonniere deformity?

Finger 8 splint for 6 weeks.

7

What is the cause of a mallet finger

Rupture or avulsion of the terminal extensor tendon

8

What does a patient present with when they have mallet finger?

Inability to extend distal phalanx

9

What is swan neck deformity?

Hyperextension of PIP joint and flexed DIP joint

10

What is the cause of swan neck deformity?

Volar plate laxity of injury (PIP)
Subluxation (MP)