Class 21: Other Vascular Testing Modalities

Question 1

6 other types of other vascular testing modalities?

Answer 1

1. venous outflow plethysmography
2. arterial plethysmography
3. transcutaneous partial pressure of oxygen
4. angiography
5. magnetic resonance angiography
6. venography

Question 2

plethysmography measures changes in ____

Answer 2

volume

Question 3

3 types of venous outflow plethysmography?

Answer 3

1. impedance plethysmography (IPG)
2. strain-gauge plethysmography (SPG)
3. air-cuff plethysmography

Question 4

testing rationale for venous outflow plethysmography states that if venous thrombus exists, what two things are true for blood flow in the LEV?

Answer 4

1. blood pooling in LEV will increase greatly
2. blood outflow from LEV will be much slower

Question 5

what 2 things does plethysmography monitor?

Answer 5

1. filling/capacitance
2. emptying/outflow

Question 6

what is the normal rate of filling in a healthy vein in the lower extremities?

Answer 6

> 20 sec

Question 7

what does IPG stand for?

Answer 7

impedance plethysmography

Question 8

what does IPG measure?

Answer 8

small changes in electrical resistance in calf

Question 9

what does SPG stand for?

Answer 9

strain-gauge plethysmography

Question 10

what does SPG measure?

Answer 10

changes in volume (physical size) of calf

Question 11

what is another name for air-cuff plethysmography?

Answer 11

pneuomplethysmography

Question 12

what does pneumoplethysmography measure?

Answer 12

pressure changes in cuff reflecting changes in calf volume

Question 13

when is there a rise on the strip chart regardless of the type of plethysmography?

Answer 13

whenever blood pools in the area being monitored (normal)

Question 14

venous outflow plethysmography uses what type of coupling?

Answer 14

DC

Question 15

what is arterial plethysmography?

Answer 15

type of vascular testing that measures arterial changes in volume

Question 16

what type of coupling is used in arterial plethysmography?

Answer 16

AC

Question 17

normal findings of arterial plethysmography include a ___ upstroke, ___ peak, downstroke toward ___, and dicrotic notch may/may not be present

Answer 17

quick, sharp, baseline

Question 18

what does TcPO2 stand for?

Answer 18

transcutaneous partial pressure of oxygen

Question 19

what is the purpose of TcPO2?

Answer 19

to assess potential amputation sites for the likelihood of healing

Question 20

what is the normal partial pressure of oxygen?

Answer 20

55-77 mmHg

Question 21

what is another name for angiography?

Answer 21

arteriography

Question 22

what is arteriography?

Answer 22

a test allowing arteries to be seen on x-ray after injecting contrast medium

Question 23

what can a carotid angiogram evaluate?

Answer 23

TIA patients can be evaluated for stenosis/occlusion of the carotid

Question 24

what can a cerebral angiogram evaluate? (2)

Answer 24

1. presence of brain aneurysm
2. assess brain tumors pre-op

Question 25

what can a cardiac angiogram evaluate?

Answer 25

stenosis/occlusion of coronary arteries

Question 26

what does MRA stand for?

Answer 26

magnetic resonance angiography

Question 27

what is MRA?

Answer 27

the MRI study of arteries

Question 28

2 other names for venography?

Answer 28

phlebography
venogram

Question 29

what is venography?

Answer 29

a test allowing veins to be seen on x-ray

Question 30

what is the gold standard for detecting DVT?

Answer 30

phlebography/venography/venogram