DocumentCode :
1217192
Title :
Noninvasive Versus Invasive Doppler Renal Blood Velocity and Flow Measurements
Author :
Greene, Ernest R. ; Avasthi, Pratap S. ; Voyles, Wyatt F. ; Seigel, Rober S.
Author_Institution :
Research Division of the Lovelace Medical Foundation
Issue :
3
fYear :
1986
fDate :
3/1/1986 12:00:00 AM
Firstpage :
302
Lastpage :
307
Abstract :
We compared simultaneous noninvasive and invasive determinations of blood velocity and flow in the renal arteries of 5 mongrel dogs. Noninvasive measurements of blood velocity spectra (¿FN) were made using an ultrasonic echo-Doppler duplex scanner. Vessel diameters (DN) and Doppler angles (¿N) were measured from sector images of the renal artery. Invasive measurements of blood velocity spectra (¿F1) were made using a catheter Doppler velocimeter. Vessel lumen diameter (D1) and Doppler angle (¿1) were measured angiographically. Using the Doppler and continuity equations, temporal mean blood velocities (VN, V1) and flows (QN, Q1) of five cardiac cycles were calculated. The ranges of velocity (8-48 cm/s) and flow (40-380 ml/min) were varied by pharmacological intervention. Standard linear regressions (n = 33) were Results suggest that simultaneous noninvasive echo-Doppler and invasive catheter Doppler measurements of canine renal artery blood velocity and flow correlate significantly. Nevertheless, large standard errors of the estimates exist which suggest that important systematic and experimental errors are present in both methods.
Keywords :
Arteries; Blood; Catheters; Dogs; Equations; Fluid flow measurement; Goniometers; Noninvasive treatment; Ultrasonic variables measurement; Velocity measurement; Animals; Blood Flow Velocity; Dogs; Renal Circulation; Rheology;
fLanguage :
English
Journal_Title :
Biomedical Engineering, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9294
Type :
jour
DOI :
10.1109/TBME.1986.325714
Filename :
4122280
Link To Document :
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