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Apparatus for measuring properties of gases supplied to a patient

  • US 9,814,856 B2
  • Filed: 12/15/2016
  • Issued: 11/14/2017
  • Est. Priority Date: 08/20/2004
  • Status: Active Grant
First Claim
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1. An apparatus for supplying gases to a patient comprising:

  • a gases supply;

    a delivery conduit;

    a heater wire configured to heat said conduit, wherein said heater wire is located within, around or throughout said conduit;

    at least one identification element having a characteristic impedance, wherein said at least one identification element is used in an electrical circuit including said heater wire; and

    a controller configured to control the heating of the heater wire, wherein said controller is configured to measure said characteristic impedance of said identification element and identify said delivery conduit based on said characteristic impedance and to apply power to said heater wire based at least in part on the identified conduit.

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