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Flashcards in Quiz 1 Deck (54)
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1

What is the range of a normal teardrop distance?

Normal = 6-11 mm

2

What view is required to measure a teardrop distance?

AP pelvis or hip or modified lateral

3

What is waldenstrom's sign

> 11mm (than normal) or > 2mm right vs left from the teardrop distance

4

What is the ratio of the hip joint space width?

4mm: 4mm: 8mm = 1:1:2

5

What is the range of the superior hip joint space width?

3-6 mm

6

What is the range of the axial hip joint space width?

3-7mm

7

What is the range of the medial hip joint space width?

(4-13mm)

8

What view is required for the hip joint space width?

AP hip

9

How do you measure the acetabular depth?

Line from superior pubis at joint margin to upper outer acetabulum; measure from this line to greatest distance to acetabulum floor

10

What view do you need for acetabular depth?

AP pelvis, hip

11

What is the normal acetabular depth?

Male: 7-18mm
Female: 9-18mm

12

What does an acetabular depth of <9mm?

dysplastic

13

What view is needed for the symphysis pubis width?

Ap pelvis

14

How do you measure the symphysis pubis width?

Measure between joint surfaces at halfway point

15

What are the normal measurements of symphysis pubis width?

Male: 5-7mm
Female: 4-6 mm

16

What view is required for the presacral space measurement?

Lateral sacrum

17

How do you measure the presacral space?

Measure soft tissue distance from anterior sacrum to posterior rectum (gas density)

18

What is the normal range of presacral space?

15 yo: 2-20mm

>20 mm = abnormal soft tissue

19

What is the view required for acetabular angle?

AP pelvis

20

who do you do acetabular angle on?

pediatric patients

21

How do you measure the acetabular angle?

Transverse line through the triradiate cartilages; second line connects lateral and medial acetabular surfaces; measure angle formed

22

What is the normal measurement of acetabular angle?

12-29 degrees

23

What is the measurement of protrusio acetabuli also known as?

Kohler's line

24

what view do you need to measure protrusio acetabulli?

Ap pelvis, hip

25

How do you measure the protrusio acetabuli?

tangential line to margin of pelvic inlet and outer border of obturator

26

What is the normal measurement of protrusio acetabuli?

acetabular floor should not cross the tangential line drawn

27

What is the femoral neck angle?

Formed by the axis of the femoral neck with the axis of the femoral shaft

28

What is the normal range of the femoral neck angle?

Should be between 120 -130 degrees

29

What is coxa vara?

Value < 120 degrees

30

What is coxa valgum?

>130 degrees