Why the study?
Does the ultrasonic pulsatility index accurately reflect the severity of proximal arterial stenosis in a canine model?
Does the ultrasonic pulsatility index accurately reflect the severity of proximal arterial stenosis in a canine model?
The ultrasonic pulsatility index correlates broadly with arterial stenosis severity but exhibits wide variability due to distal vascular bed differences, limiting its precision except in very tight stenoses.
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PI reduction signals tight stenoses in canines but varies widely otherwise; leaves open its diagnostic reliability in humans.
Evans et al. (1980) studied this question.
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