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Diagnostic Imaging II Exam Two > Wrist and Fingers > Flashcards

Flashcards in Wrist and Fingers Deck (46)
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1

What is the most common carpal injury?

Scaphoid

2

What is the second most common carpal injury?

Triquetral chip fracture

3

What is the third most common carpal injury?

Hamate

4

The majority of scaphoid fractures (70%) occur where?

Waist (middle 1/3)

5

Where would a patient with a scaphoid fracture point to an area of pain?

Snuffbox

6

There is a higher likelihood of complications when a scaphoid fracture is in which direction?

More posterior

7

What is the best view to assess a scaphoid fracture?

P-A with ulnar deviation (flexion)

8

How does an area of scaphoid AVN occur on plain film?

Area of white density

9

What is the name of the sign where a large gap is seen between the lunate and scaphoid?

Terry Thomas sign

10

What X-ray view is used for a triquetral fracture?

Only lateral

11

What usually causes a triquetral fracture?

Avulsion from ligaments

12

What is a big sign on X-ray for a hamate fracture?

No hook present

13

What is the most common carpal dislocation?

Perilunate dislocation

14

What is the second most common carpal dislocation?

Lunate dislocation (anterior)

15

In what type of carpal dislocation does everything move relative to the lunate?

Perilunate

16

What is the normal amount of joint space between the carpal bones?

1-2 mm

17

What is the mechanism of injury for a perilunate dislocation?

FOOSH

18

What is a common fracture to be associated with a perilunate dislocation?

Scaphoid (75%)

19

With a perilunate dislocation, in which direction does everything go except the lunate?

Posterior

20

The "pie sign" is associated with what injury?

Anterior lunate dislocation

21

What is the mechanism of injury for an anterior lunate dislocation?

Hyperextension

22

What is the most common carpal instability pattern?

Rotatory subluxation of the scaphoid

23

A Terry Thomas sign greater than 4mm is associated with what carpal instability pattern?

Rotatory subluxation of scaphoid

24

What is the X-ray sign associated with a rotatory subluxation of scaphoid?

Ring sign

25

What is the "ring sign"?

The scaphoid appears round in shape instead of kidney bean

26

What is the diagnosis if both a ring sign and Terry Thomas sign are present?

Rotatory subluxation of the scaphoid

27

What is the name of the fracture occurring at the neck of the metacarpals?

Boxer's/Bar Room

28

What causes a Bar Room fracture?

Direct blow with the fist

29

What is unique about the visibility of a Boxer's fracture on X-ray?

Visible on all views of the hand

30

What is the most common location for a Boxer's fracture?

5th digit