Arm Classifications

Question 1

Distal humerus fx?

Answer 1

1) Uni or bicondylar

2) T, Y, or lambda type

Question 2

Supracondylar humerus fx types?

Answer 2

1) Extension

2) Flexion (uncommon)

Question 3

Extension type supracondylar humerus fx types?

Answer 3

I: Nondisplaced
II: Partially displaced (post. cortex intact)
III: Displaced (no cortical continuity)

Question 4

Olecranon fx?

Answer 4

Colton:
I: nondisplaced = <2mm
II: displaced = displace, avulsion, tranverse/oblique, comminuted, displaced fx-dx

Question 5

Radial head fracture?

Answer 5

Mason: 4 types
I: nondisplaced (<2mm)
II: single displaced fragment
III: comminuted
IV: fx with elbow dislocation

Question 6

Elbow dislocation classifications?

Answer 6

By direction of forearm bones:

• Posterior (posterolateral >80%)
• Medial
• Lateral (rare)
• Anterior (rare)
• Divergent (rare)