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    Ultrasonic Doppler measurement of renal artery blood flow (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: An extensive evaluation of the practical and theoretical limitations encountered in the use of totally implantable CW Doppler flowmeters is provided. Theoretical analyses, computer models, in-vitro and in-vivo calibration studies describe the sources and magnitudes of potential errors in the measurement of blood flow through the renal artery, as well as larger vessels in the circulatory system. The evaluation of new flowmeter/transducer systems and their use in physiological investigations is reported.
    Keywords: AEROSPACE MEDICINE
    Type: NASA-CR-148131 , SEL-76-004
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Ultrasonic Doppler measurement of renal artery blood flow (1976)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Studies were made of (1) blood flow redistribution during lower body negative pressure (LBNP), (2) the profile of blood flow across the mitral annulus of the heart (both perpendicular and parallel to the commissures), (3) testing and evaluation of a number of pulsed Doppler systems, (4) acute calibration of perivascular Doppler transducers, (5) redesign of the mitral flow transducers to improve reliability and ease of construction, and (6) a frequency offset generator designed for use in distinguishing forward and reverse components of blood flow by producing frequencies above and below the offset frequency. Finally methodology was developed and initial results were obtained from a computer analysis of time-varying Doppler spectra.
    Keywords: AEROSPACE MEDICINE
    Type: NASA-CR-148780 , SU-SEL-76-030 , TR-4962-3
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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