PDDT (Derifield Leg Check)

Question 1

Typically ankle inversion is noted on what leg in the prone extended position?

Answer 1

short leg

Question 2

If ankle inversion is on the side opposite the short leg in the prone position, it may be due to…

Answer 2

a previous ankle inversion sprain

Question 3

What is Step 1 in Derifield Leg Check?

Answer 3

• -Remove ankle inversion/eversion

- -Apply headward pressure w/ the thumbs to assess for short leg

Question 4

What are the 3 sighted reference points for Derifield Leg Checks?

Answer 4

As the doctor raises the legs to 90 degrees flexion, the doctor sites a line running between the:

• • Thighs
• • 2nd Sacral Tubercle
• -EOP

Question 5

What is Step 2 in Derifield Leg Check?

Answer 5

• • Place the chiropractic index finger across the metatarsal-phalangeal junction
• • Raise feet up to 90* flexion
• -Remove inversion/eversion and assess for short leg

Question 6

INTERPRETATION OF THE INITIAL DERIFIELD LEG CHECK

• –If the reactive (right) leg is ½” short in the prone extended position, and:
• -1) stays ½” short or
• -2) shortens more than ½” in the knee-flexed position,

==the initial leg check indicates……

Answer 6

the initial leg check indicates Right NegativeDerifield.*

Question 7

INTERPRETATION OF THE INITIAL DERIFIELD LEG CHECK

• –If the reactive (right) leg is ½” short in the prone extended position, and then
• -1) lengthens,
• -2) becomes even, or
• -3) crosses over and becomes long in the knee-flexed position;

==the initial leg check indicates…….

Answer 7

the initial leg check indicates Right Positive Derifield.*

Question 8

INTERPTRETATION OF THE INITIAL DERIFIELD LEG CHECK

—If the legs are even in the prone extended position, but one leg becomes long in the knee-flexed position, this usually indicates _______

Answer 8

Positive Derifield

–on the side of the long leg in the knee-flexed position.