Method and apparatus for the noninvasive assessment of hemodynamic parameters including blood vessel location
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United States of America Patent
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Mar 17, 2009
Grant Date -
May 9, 2002
app pub date -
Mar 22, 2001
filing date -
Jun 29, 1999
priority date (Note) -
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Abstract
A method and apparatus for determining the mean arterial blood pressure (MAP) of a subject during tonometric conditions. In one embodiment, the apparatus comprises one or more pressure and ultrasound transducers placed over the radial artery of a human subject's wrist, the latter transmitting and receiving acoustic energy so as to permit the measurement of blood velocity during periods of variable compression of the artery. In another aspect of the invention, a wrist brace useful for measuring blood pressure using the aforementioned apparatus is disclosed. In yet another aspect of the invention, backscattered acoustic energy is used to identify the location of the blood vessel of interest, and optionally control the position of measurement or treatment equipment with respect thereto.
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