main points Flashcards
carotid artery stenosis of 50-79% would have a PSV of ____ and a EDV or ___
>125 <140
a carotid artery stenosis of 79-99% would have a PSV of? and EDV of?
>125, >140
when assessing the degree of vasospasm what is considered normal?
<120
when assessing the degree of vasospasm what is considered severe?
>=200
subclavian steal is more frequent on the ____ side rather than the ____..there is often a lower brachial blood pressure ipsilateral to the steal. the abnormal brachial blood pressure would be >= ___-___mmHg lower than the contralateral side
left, right 15-20
what is the diameter reduction equation?
1-(d/D) x100
Q=
Q=P/R flow = pressure/ resistance
with RAR of ___ is equal to 60% stenisis or PSV of?
>=3.5, 180-200
for renal artery stenosis, finding a peak systolic velocity of ___-____ along with post stenotic turbulence is consideres to be abnormal and suggestive of a >=60% diameter reuction
>=180-200cm/sec ( found in the renal artery)
when evaluating upper arm to forarm and difference of ___-____ is abnormal
>=15-20mmHg
what is a normal finger brachial index?
.8-.9
when peforming a toe brachial index the toes should be ____-___% compaired to the highest brachial pressure
60-80%
the most important element in the serial assessment of bypass grafts is the comparison of the current study to the previous study. a segmental decrease of ____ cm/sec PSV is abnormal
30 cm/sec
the most important element in the serial assessment of bypass grafts is the comparison of the current study to the previous study. a change in quality of phascitity from ___ to ____ is considered abnormal
triphasic to biphasic or biphasic to monophasic of from triphasic to monophasic
the most important element in the serial assessment of bypass grafts is the comparison of the current study to the previous study. a decrease in ABI of ____ is considered abnormal
>.15
Whats normal RI? abnormal?
<.7, >=.7
normal PRR? abnormal PRR?
>=.2, <.2
SMA with a 275 cm/sec = ____% stenosis
70%
what is a normal PPG refill time?
>20 seconds
in general an acceleration time of ____ msec in the common femoral artery suggests the presence of significant iliac disease
>=133
with toe pressure what number would it be if it were to fail to heal?
<30
veins must measure what to be used in a bypass graft
2-3
reactive hypermia what represents a single level disease?
2-6 minutes after exercise to be normal
reactive hyperemia what represents a multilevel disease?
6-12 minutes
normal penile pressure? abnormal?
>.75 ,
what is poiseilles simple equation?
Q=P/R pressure / resistance
with 4 cuff what is the thigh pressure compared to the brachial
20-30 above
if the vertebral artery is below baseline what would you expect is happening?
subclavian steal
occlusion of the Rt ICA may result in a neurological defect to which part of the brain?
Rt anterior circulation
during contraction on the calf muscle what prevents flow from going back into the superficial system
flow maintains its unidirectional flow because of the closed valves in there perforators
T/F flow from the posterior arch vein flows into the GSV?
True
Budd chiari syndrome results from what?
hepatic vein occulsion
how are velocity and pressure related?
inversely
which endoleaks are most easily flung w ultrasound and usually repaired when found?
type I and III
T/F percutaneous transluminal angioplasty is used to dilate focal plaque formation in a vessel
true
for insitu bypass grafts it is important to observe the presence of patent branches that have not be ligated as they could form what?
AVF
with any graft what is the biggest concern ?
leaks causing peudoaneuryms as well as stenosis
what is the most frequent term used to describe a stent?
scaffold
celiac artery stenosis improves with what?
deep inspiration and returns with expiration
compared to a normal artery an artery PROXIMAL to the fistula has greatly increased flow especially during what?
diastole because the fistula markedly reduces resistance
the plethysmographic waveform known as peaked pulses a characteristic of what condition?
raynauds
why is a patient most likely referred to the vascular lab for radial arty mapping?
to determin viability of use for coronary bypass
