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Apparatus and method of assessing a narrowing in a fluid filled tube

DC
  • US 9,775,524 B2
  • Filed: 04/30/2015
  • Issued: 10/03/2017
  • Est. Priority Date: 01/06/2011
  • Status: Active Grant
First Claim
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1. A method of assessing a narrowing in a blood vessel, the method comprising:

  • positioning at least one pressure-sensing probe within a blood vessel;

    obtaining, with an intravascular processing system having a processor in communication with the at least one pressure-sensing probe, pressure measurements from within the blood vessel using the at least one pressure-sensing probe, the pressure measurements being obtained not during hyperaemia;

    identifying, with the intravascular processing system, a wave free period corresponding to a time window when a differential of flow velocity is minimal or absent; and

    calculating, with the intravascular processing system, a pressure ratio using the pressure measurements obtained during the wave free period to provide an assessment of a severity of the narrowing in the blood vessel.

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