Measurement of systolic pressure
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United States of America Patent
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May 12, 2015
Grant Date -
Nov 17, 2011
app pub date -
Dec 3, 2009
filing date -
Dec 5, 2008
priority date (Note) -
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Abstract
A noninvasive method for measuring systolic blood pressure Psyst, by applying and maintaining an astringent emptying pressure P1, which is above the systolic blood pressure Psyst, on a first zone of the finger located in the vicinity of the distal part of the finger, applying and maintaining an astringent occluding pressure P2, which is above the systolic blood pressure Psyst, on a second zone of the finger located upstream of the first zone, releasing the emptying pressure P1, releasing the occluding pressure P2 in a controlled manner, and, at the same time, acquiring at least the occluding pressure P2 and at least the blood volume Vs, at the level of the first zone as a function of time, and calculating the systolic blood pressure Psystcorresponding to the occluding pressure P2 at the moment of blood return in the finger, characterized by a substantially positive variation in the blood volume Vsof the finger at the level of the first zone.
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