Flashcards in Quiz 1 Deck (54)
What is the range of a normal teardrop distance?
Normal = 6-11 mm
What view is required to measure a teardrop distance?
AP pelvis or hip or modified lateral
What is waldenstrom's sign
> 11mm (than normal) or > 2mm right vs left from the teardrop distance
What is the ratio of the hip joint space width?
4mm: 4mm: 8mm = 1:1:2
What is the range of the superior hip joint space width?
What is the range of the axial hip joint space width?
What is the range of the medial hip joint space width?
What view is required for the hip joint space width?
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
What view do you need for acetabular depth?
AP pelvis, hip
What is the normal acetabular depth?
What does an acetabular depth of <9mm?
What view is needed for the symphysis pubis width?
How do you measure the symphysis pubis width?
Measure between joint surfaces at halfway point
What are the normal measurements of symphysis pubis width?
Female: 4-6 mm
What view is required for the presacral space measurement?
How do you measure the presacral space?
Measure soft tissue distance from anterior sacrum to posterior rectum (gas density)
What is the normal range of presacral space?
15 yo: 2-20mm
>20 mm = abnormal soft tissue
What is the view required for acetabular angle?
who do you do acetabular angle on?
How do you measure the acetabular angle?
Transverse line through the triradiate cartilages; second line connects lateral and medial acetabular surfaces; measure angle formed
What is the normal measurement of acetabular angle?
What is the measurement of protrusio acetabuli also known as?
what view do you need to measure protrusio acetabulli?
Ap pelvis, hip
How do you measure the protrusio acetabuli?
tangential line to margin of pelvic inlet and outer border of obturator
What is the normal measurement of protrusio acetabuli?
acetabular floor should not cross the tangential line drawn
What is the femoral neck angle?
Formed by the axis of the femoral neck with the axis of the femoral shaft
What is the normal range of the femoral neck angle?
Should be between 120 -130 degrees
What is coxa vara?
Value < 120 degrees