Chapter 7: Segmental Pressures

Question 1

Two methods used for segmental pressures

Answer 1

-four cuff method (two thigh cuff)
-three cuff method (one thigh cuff)

Question 2

Where are the cuffs placed for the 4 cuff method

Answer 2

-brachial, bilaterally
-high thigh
-above knee
-below knee, upper calf
-ankle

Question 3

Where are the cuffs placed in 3 cuff method

Answer 3

-brachial, bilaterally
-one thigh cuff method
-below knee
-ankle

Question 4

What size cuff is used for brachial

Answer 4

10 cm or 12 cm

Question 5

What size cuff is used for calf and ankle

Answer 5

10cm

Question 6

What size cuff is used for 4 cuff method

Answer 6

12 cm

Question 7

What size cuff is used for the 3 cuff method

Answer 7

19cm

Question 8

Width of cuff 20% greater than the diameter of the limb

Answer 8

20% rule

Question 9

3 cuff method can’t differentiate between?

Answer 9

Inflow and SFA disease

Question 10

what can result in falsely elevated pressures

Answer 10

calcified vessels (medial calcinosis)

Question 11

how do you calculate the ABI

Answer 11

highest ankle pressure / highest brachial pressure

Question 12

ABI of >1.3

Answer 12

medial calcinosis

Question 13

ABI 1.0 - 1.3

Answer 13

normal

Question 14

ABI > 0.9 and <1.0

Answer 14

mild disease

Question 15

ABI 0.5-0.9

Answer 15

occlusive disease with claudication

Question 16

ABI >0.3 and < 0.5

Answer 16

severe occlusive disease

Question 17

ABI <0.3

Answer 17

critical occlusive disease

Question 18

a ____ pressure gradient drop side to side or from one level to the next is significant in the presence of an abnormal ABI

Answer 18

20-30 mmHg

Question 19

a toe pressure of _____ or less has a very poor healing potential

Answer 19

30mm/Hg

Question 20

a ____ pressure gradient drop side to side or from one level to the next is significant (upper extremity)

Answer 20

15-20 mmHg

Question 21

a difference of >20 mmHg between ____suggests obstruction in the vessel with the lower pressure

Answer 21

radial and ulnar