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Diagnostic Imaging II Exam Two > Hip and Legs > Flashcards

Flashcards in Hip and Legs Deck (71)
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1

Why is it important to not externally rotate the hip on X-ray?

Shortens the neck of the femur

2

What is the most common type of hip dislocation?

Posterior (85-90%)

3

How is the leg positioned after a posterior hip dislocation?

Internally rotated and adducted (across midline) and leg is superior to acetabulum

4

If the femur is seen superior on X-ray following a dislocation, what type probably occurred?

Posterior

5

Where does the leg lie after an anterior hip dislocation?

Externally rotated, abducted, and flexed

6

Anterior hip dislocations may be associated with what other condition?

Femoral neck fracture

7

If the femur is seen inferior on X-ray following a dislocation, what type probably occurred?

Anterior

8

Where would the femur end up after a central hip dislocation?

Into pelvic outlet

9

What is the most serious complication of fractures of the proximal femur?

AVN

10

What gender is more likely to be affected by fractures of the proximal femur? Age population?

Females; elderly

11

What is the most common location for a fracture of the proximal femur?

Subcapital

12

What two kinds of stress can cause a fracture of the proximal femur?

Overuse or insufficiency

13

What is the most common fracture seen due to insufficiency?

Hip (proximal femur)

14

What imaging procedure should be used following hip trauma?

MRI to check for marrow edema

15

How long does it take for a stress fracture to appear as a transverse radiolucency or fluffy periosteal reaction?

7-10 days

16

Why do stress fractures usually appear radiographically normal?

Less than 30% bone destruction, so unable to be seen

17

What is most likely the cause of a femoral shaft fracture in children under 5?

Abuse (usually transverse or comminuted)

18

What is the best recommendation for an athlete with a stress fracture?

REST for 6 months to allow healing

19

The FBI sign is more important in what area?

Knee

20

What is the most common area to be affected of the proximal tibia?

Lateral tibial plateau

21

An avulsion of the anterior tibial spine is more common in what population?

Children

22

An avulsion of the anterior tibial spine results from what mechanism?

Hyperextension (usually fall of bicycle)

23

What soft tissue injury is likely to occur with an avulsion of the anterior tibial spine?

ACL (more common in adults)

24

What is the most common patella fracture type?

Transverse/horizontal

25

What is an important differential diagnosis when assessing patellar fractures?

Bipartite patella (look to history)

26

What is the usual location for a bipartite patella?

Superlateral margin

27

What is the most common knee ligament to be damaged?

MCL

28

What is the second most common knee ligament to be damaged?

ACL

29

What is the most common forced directed to the knee for injury?

Lateral to medial

30

What makes up the Odonohue's triad?

MCL tear, ACL tear, lateral meniscus compression (MAYBE medial meniscal damage, too)