Spine Parameters Flashcards Preview

Random > Spine Parameters > Flashcards

Flashcards in Spine Parameters Deck (11):
1

How is lumbar lordosis measured?

sagittal Cobb angle measurement from the superior end plate of L1 to the sacral end plate

2

What is normal lumbar lordosis?

Within 11 degrees of the Pelvic Incidence (can range from 20 to 70 degrees)

3

What levels contribute the most to lumbar lordosis?

L4-5 and L5-S1

4

What is pelvic incidence? How can it be measured?

PI is the sum of the Pelvic Tilt (PT) and the Sacral Slope (SS)

Geometrically, this is the angle formed between a line from the center of the femoral head to the midpoint of the sacral end plate and a line orthogonal to the sacral end plate

5

What is the relationship between PI and skeletal maturity?

increases with growth and becomes fixed at skeletal maturity

6

Which of the pelvic parameters is fixed and serves as the foundation?

Pelvic Incidence

7

What is pelvic tilt?

the angle formed by a vertical line through the center of the femoral heads and the line from the center of the femoral axis and the midpoint of the sacral end plate

8

What is a normal value for Pelvic Tilt?

Less than 15 degrees

9

How do people compensate for a loss of lumbar lordosis?

increase their PT via hip extension

10

What is sacral slope?

the angle formed between the horizontal and the sacral end plate

11

What is a plumb line?

A way of assessing sagittal balance

Draw a line from the middle of the C7 vertebral body straight down. It should pass through the superior endplate of S1 by 1.7 to 2 cm