This paper is only available as a PDF. To read, Please Download here.
Abstract
A quantitative directional Doppler system was used to determine blood flow in 8 mm.
aortoaortic Dacron grafts in dogs. The Doppler was calibrated with frequency standards
and the output was integrated for one minute intervals. With the probe held at an
angle of 60° to the, flow axis, the average frequency of the Doppler shift was determined.
Frequency was converted to velocity with the Doppler equation. Volume flow was calculated
from the product of velocity and cross-sectional area of the graft. When, compared
with an electromagnetic, flowmeter, the Doppler system was highly accurate with flow
rates up to 900 c.c. Per minute. At flow rates above 900 c.c. per minute, there was
a significant decrease in Doppler output which probably is due to the effects of turbulence
and background noise on the Doppler signal.
To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to SurgeryAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- Experimental and clinical experience with transcutaneous Doppler ultrasonic flowmeters.Arch. Surg. 1970; 101: 21
- Blood flow and microcirculation.in: John Wiley & Sons, Inc.,, New York1974: 100
- An ultrasonic pulsed Doppler system for measuring blood flow in small vessels.J. Appl. Physiol. 1974; 37: 626
- A phase-locked echo tracking system for recording arterial diameter changes in vivo.J. App. Physiol. 1974; 32: 728
- Continuous monitoring of cardiac output.Biotelemetry. 1974; 1: 21
- Analysis of flow patterns in blood vessels with the directional ultrasonic Doppler technique through a transcutaneous approach.Jap. Circ. J. 1973; 37: 735
- Human carotid artery wall thickness, diameter, and blood flow by a noninvasive technique.J. Appl. Physiol. 1974; 37: 955
- A review of noninvasive measurement of blood flow.Biomed. Eng. 1974; 9: 335
Article info
Publication history
Accepted:
November 12,
1975
Footnotes
☆This work was supported by National Institutes of Health Grant, RR05487-13 and RR-05569-10. Dacron grafts were supplied by U.S.C.I.
Identification
Copyright
© 1976 Published by Elsevier Inc.
