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Method and apparatus for non-invasively measuring hemodynamic parameters using parametrics

  • US 9,814,398 B2
  • Filed: 12/02/2013
  • Issued: 11/14/2017
  • Est. Priority Date: 02/05/2002
  • Status: Active Grant
First Claim
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1. A method for determining an optimum location for applanating a blood vessel, comprising:

  • placing a transducer proximate to one side of a blood vessel at a starting position laterally offset from said substantially optimum location for applanating said blood vessel;

    automatically moving said transducer laterally over said blood vessel from said starting position to an ending position at a first rate, said ending position being past said substantially optimum location for applanating said blood vessel on a second side of said blood vessel, said automatic moving occurring while simultaneously measuring pulse pressure of said blood vessel via said transducer in order to collect a first pulse pressure data set;

    automatically backtracking said transducer laterally over said blood vessel from said ending position toward said starting position at a second rate, said automatic backtracking occurring while simultaneously measuring pulse pressure of said blood vessel via said transducer in order to collect a second pulse pressure data set;

    based at least in part on a correlation between said first and second pulse pressure data sets, determining said optimum location; and

    based at least in part on said determination of said optimum location, automatically positioning said transducer over said blood vessel to place said transducer over said substantially optimum location.

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