Abstract
Article: Analysis of the Velocity Profile of the Popliteal Artery and Its Relevance During Blood Flow Studies
Authors: Omodele Abosede Olowoyeye, MBBS, MSc, Stephanie Elaine Gar-Wai Chiu, MSc, PhD, General Leung, MSc, PhD, Graham A. Wright, MASc, PhD, and Alan R. Moody, MBBS, FRCP, FRCR
Category: Vascular [VT]
Credit: 0.75 SDMS CME Credit
Objectives: After studying the article entitled “Analysis of the Velocity Profile of the Popliteal Artery and Its Relevance During Blood Flow Studies,” you will be able to
Determine appropriate machine settings for thorough popliteal artery velocity evaluation.
Determine the shear stress on the popliteal arterial wall.
Describe characteristic pathologic Doppler waveform changes in the popliteal artery.
The calculated wall shear rate in an artery is inversely proportional to the _________. Maximum velocity Bluntness factor Vessel diameter Blood viscosity
In a normal healthy artery, the increased flow of reactive hyperemia causes _________. Arterial dilation Arterial constriction A high resistance flow waveform No changes
What is the calculated bluntness factor in a vessel with turbulent flow likely to be? < 0.1 0.2-0.3 0.4-0.5 > 0.5
In the study reported, to avoid flow artifacts the popliteal artery velocity was measured at a site _________. At the origin of the popliteal artery In the proximal one-third of the popliteal artery Approximately 2 cm above the origin of the anterior tibial artery At the origin of the anterior tibial artery
What does the velocity profile in the popliteal artery appear to be in the resting state in young healthy normal patients? Somewhat blunted A fully developed parabola Plug flow Monophasic
What should the ratio TAVmean:TAVmax be in fully developed parabolic flow? 0.1 0.3 0.5 1.0
What does the Reynolds number predict? Peak systolic velocity End diastolic velocity Mean velocity The transition from laminar to turbulent flow
Footnotes