Class 21: Other Vascular Testing Modalities Flashcards
6 other types of other vascular testing modalities?
- venous outflow plethysmography
- arterial plethysmography
- transcutaneous partial pressure of oxygen
- angiography
- magnetic resonance angiography
- venography
plethysmography measures changes in ____
volume
3 types of venous outflow plethysmography?
- impedance plethysmography (IPG)
- strain-gauge plethysmography (SPG)
- air-cuff plethysmography
testing rationale for venous outflow plethysmography states that if venous thrombus exists, what two things are true for blood flow in the LEV?
- blood pooling in LEV will increase greatly
- blood outflow from LEV will be much slower
what 2 things does plethysmography monitor?
- filling/capacitance
- emptying/outflow
what is the normal rate of filling in a healthy vein in the lower extremities?
> 20 sec
what does IPG stand for?
impedance plethysmography
what does IPG measure?
small changes in electrical resistance in calf
what does SPG stand for?
strain-gauge plethysmography
what does SPG measure?
changes in volume (physical size) of calf
what is another name for air-cuff plethysmography?
pneuomplethysmography
what does pneumoplethysmography measure?
pressure changes in cuff reflecting changes in calf volume
when is there a rise on the strip chart regardless of the type of plethysmography?
whenever blood pools in the area being monitored (normal)
venous outflow plethysmography uses what type of coupling?
DC
what is arterial plethysmography?
type of vascular testing that measures arterial changes in volume
what type of coupling is used in arterial plethysmography?
AC
normal findings of arterial plethysmography include a ___ upstroke, ___ peak, downstroke toward ___, and dicrotic notch may/may not be present
quick, sharp, baseline
what does TcPO2 stand for?
transcutaneous partial pressure of oxygen
what is the purpose of TcPO2?
to assess potential amputation sites for the likelihood of healing
what is the normal partial pressure of oxygen?
55-77 mmHg
what is another name for angiography?
arteriography
what is arteriography?
a test allowing arteries to be seen on x-ray after injecting contrast medium
what can a carotid angiogram evaluate?
TIA patients can be evaluated for stenosis/occlusion of the carotid
what can a cerebral angiogram evaluate? (2)
- presence of brain aneurysm
- assess brain tumors pre-op
what can a cardiac angiogram evaluate?
stenosis/occlusion of coronary arteries
what does MRA stand for?
magnetic resonance angiography
what is MRA?
the MRI study of arteries
2 other names for venography?
phlebography
venogram
what is venography?
a test allowing veins to be seen on x-ray
what is the gold standard for detecting DVT?
phlebography/venography/venogram
