Peripheral blood-flow condition monitor
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United States of America Patent
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Sep 30, 1997
Grant Date -
N/A
app pub date -
Aug 12, 1996
filing date -
Feb 17, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for monitoring a peripheral blood-flow condition of a living subject by detecting a peripheral blood-flow resistance of the subject, including a first and a second pulse-wave sensor which are adapted to be worn on a first and a second portion of the subject, respectively, to detect a first and a second pulse wave, respectively, each of which is produced in synchronism with a heartbeat of the subject, a phase-difference determining device for determining a difference of respective phases of the first and second pulse waves detected by the first and second pulse-wave sensors, and a peripheral blood-flow resistance determining device for determining the peripheral blood-flow resistance of the subject, based on the phase difference determined by the phase-difference determining device, according to a predetermined relationship between peripheral blood-flow resistance and phase difference.
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