Method and device for assessing the state of blood vessels
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United States of America Patent
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Feb 10, 1998
Grant Date -
N/A
app pub date -
Mar 8, 1996
filing date -
Sep 14, 1993
priority date (Note) -
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Abstract
A method and device for use in assessing the state of blood vessels within the human or animal body is provided. A vessel segment is identified for investigation, and at least one blood pressure responsive device is used to obtain pulse volume recordings of different sites, representing pressure at sites proximal and distal to the vessel segment. From the waveform signals obtained, Fourier transform spectra are determined for the respective sites and the transfer function between them is calculated. This is then analyzed to determine a clinically significant parameter, such as the integral of the transfer function, and this can be compared with a predetermined value to provide an indication as to the state of the vessel segment.
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