Peripheral Resistance Flashcards
flow is steady in nature feeding a dilated vasc bed
low resistance flow
diastole reflects
where the blood is going
low resistance flow
there is more flow in diastole
Examples of low resistance arteries
ICA, vertebral, renal, celiac, splenic and hepatic
flow pulsatile in nature
high resistance flow
high resistance flow
little to no flow in diastole
reflections travel back up the vessel from the periphery producing
flow reversals in the vessel flow
Examples of high resistance arteries
ECA, subclavian, ao, iliac, extremity a, fasting SMA
Reversal component of a high resistant signal may disappear distal to stenosis due to
decreased peripheral resistance, secondary to ischemia
Doppler flow distal to a significant stenosis is ____ resistant
lower
if rounded, prox or dist stenosis
prox
systole reflects where the
blood came from
normally high resistant signal may become monophasic as it approaches
the significant stenosis or obstruction
doppler flow prox to a significant stenosis is ______ resistance
higher
has no diastole or minimal
vasoconstruction
pulsatile changes in medium/ small sized arteries of the limbs are
increased
