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Catheter or guidewire device including flow sensing and use thereof

  • US 9,295,842 B2
  • Filed: 01/03/2014
  • Issued: 03/29/2016
  • Est. Priority Date: 07/05/2012
  • Status: Active Grant
First Claim
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1. A method of performing a medical treatment procedure on a tissue, the method comprising:

  • disposing in proximity to the tissue an apparatus comprising;

    an elongated member having a proximal portion and a distal portion;

    at least one flow sensor disposed proximate to the distal portion of the elongated member, each of the at least one flow sensor comprising;

    at least one temperature sensor; and

    at least one heating element disposed proximate to the at least one temperature sensor;

    a reference temperature sensor disposed on a proximal portion of the elongated member; and

    a control module coupled to the at least one flow sensor and the reference temperature sensor;

    using the control module to maintain a temperature difference between the reference temperature sensor and the temperature sensor of the at least one flow sensor at a stage of performance of the medical treatment procedure, comprising;

    monitoring a value of a temperature measurement of the reference temperature sensor and/or a temperature measurement of the temperature sensor of the at least one flow sensor; and

    controlling a first signal to the at least one heating element to cause the at least one heating element to emit heat or discontinue emitting heat, such that that the temperature difference is maintained,wherein the temperature difference is a constant temperature difference or a time varying temperature difference.

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