quiz 2 revision

Question 1

ORIF stands for

Answer 1

Open Reduction Internal Fixation

Question 2

Features of KEINBOCK’S DISEASE:

Answer 2

• avascular necrosis of lunate
• dense, chalky white, sclerotic appearance
• cystic degeneration, fragmentation, collapse, loss of carpal height, scaphoid rotation

Question 3

Features of Smith’s fracture

Answer 3

Fall on back of hand or direct blow
* Ventral displacement
* Can be thought of as “reverse Colle’s”

Question 4

Collie’s fracture

Answer 4

Fall on outstretched hand (FOOSH)
* Dorsal displacement
* Often seen in elderly patients with osteoporosis or in younger
patients in high impact injuries

Question 5

Greenstick fracture

Answer 5

• Incomplete fracture with the opposite cortex intact.
• Often found in infants/children.

Question 6

Scaphoid fracture sites percentages are divided into

Answer 6

Waist - middle third - 70%
Distal third/pole) - 20%
Proximal third/pole - 10%

Question 7

What are the settings for a lat and ulnar deviation

Answer 7

55kVp
3.2mAs
FFD: 100-110cm

Question 8

What are the settings for a PA and oblique

Answer 8

52kVp
3.2mAs
FFD: 100-110cm

Question 9

For a PA wrist, we have to collimate __ and align the central ray to be __

Answer 9

Centre: Perpendicular to mid carpal area
Collimation: Include the proximal metacarpals and 1/3 of the radius and ulna

Question 10

For olique PA, we have to centre it to be

Answer 10

Perpendicular to mid carpal area; just distal to radius

Question 11

For lateral wrist we have to centre it to be

Answer 11

At the level of the styloid processes

Question 12

For PAAXIAL WRIST
with ULNAR DEVIATION, we have to centre it to be

Answer 12

To the scaphoid

Angle the xray tube 10-15 deg along the long axis of the forearmproximally

Question 13

Shaft fracture is

Answer 13

Usually 3rd or 4th metacarpal
► Dorsal angulation

Question 14

Boxer’s fracture is

Answer 14

► 4th or 5th neck fracture
► Anterior angulation of head
► Shortening & rotation of distal fragment

Question 15

If there is a fracture of the phalanges, they are most likely

Answer 15

►Distal phalanx fracture
► Salter Harris fracture
► Shaft fracture

Question 16

Transverse bone fracture

Answer 16

horizontal

Question 17

Linear bone fracture

Answer 17

straight line in the middle of bone

Question 18

Oblique nondisplaced

Answer 18

angled in tact (no gap)

Question 19

Oblique displaced

Answer 19

angled and in 2 separate pieces

Question 20

Spiral

Answer 20

separated and a fracture line that wraps around your bone and looks like a corkscrew

Question 21

Greenstick fracture

Answer 21

Edge fracture

Question 22

Comminuted

Answer 22

cracked into smaller pieces in the middle of the bone

Question 23

How are fractures described

Answer 23

Type, location, displacement, and complications

Question 24

Bennett Fracture

BASE OF FIRST METACARPAL
FRACTURE (THUMB)

Answer 24

► # dislocation
► Shaft displaced dorso-lateral
displacement due to tendon
tension
► Intraarticular #

Question 25

Bone Age

Answer 25

► Chronological age
► Skeletal age
► Dates of appearance
► Dates of fusion
► Growth plates
► Taken of left hand
or non dominant
hand

Question 26

High radiographic contrast describes radiographs that are more

Answer 26

black and white

Question 27

What is the name of the antiscatter grid in the table bucky

Answer 27

Oscillating grid

Question 28

When referring to the radiographic contrast, low contrast refers to

Answer 28

long gray scale

Question 29

Why is low contrast referred to the long gray scale?

Answer 29

A low contrast radiograph, one which is very gray, is produced with high kVp, which produces a lot of scattered radiation (very gray image). Low contrast = small difference in intensity between the lightest and darkest parts. Long gray scale refers to the image that contains many shades of grey.

Question 30

Which AEC cell is used for erect adbomen?

Answer 30

two lateral cells