Ulna and radius fractures Flashcards Preview

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Flashcards in Ulna and radius fractures Deck (12):
1

Site of ulna fractures

Ulna shaft
Olecranon (less common)

2

Displacement of ulna shaft fracture fragments

Proximal ulna displaced posteriorly

3

Displacement of olecranon fracture fragments

Fragments displaced proximally by triceps brachii

4

Why are fractures of ulna and radius common

They are attached by interosseous membrane which can transmit force of trauma to one bone to the other

5

What are the 2 common fractures of ulna and radius

Monteggia's fracture
Galeazzi's fracture

6

Describe Monteggia's fracture and how it occurs

Proximal ulna shaft fractured
Head of radius dislocates anteriorly at elbow

Caused by force from behind ulna

7

Describe galeazzi's fracture

Distal radius fractured
Ulnar head dislocates at distal radio-ulnar joint

8

What are the 3 radius fractures

Colles' fracture (most common)
Radial head
Smith's fracture

9

Describe Colles' fracture and how it occurs

Fracture of distal radius
Structures distal to fracture (wrist and hand) are displaced posteriorly resulting in dinner fork deformity

Caused by fall onto outstretched hand

10

Describe radial head fractures and how they occur

Radial head forced into capitulum of humerus causing it to fracture

Caused by fall onto outstretched hand

11

Describe smith's fractures and how they occur

Fracture of distal radius
Structures distal to fracture (wrist and hand) are displaced anteriorly

Caused by fall on back of hand

12

How do ulna fractures commonly occur

Direct blow
Falling on a flexed elbow (olecranon)

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