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Cannula for minimizing dilution of dosing during nitric oxide delivery

  • US 9,795,756 B2
  • Filed: 12/04/2013
  • Issued: 10/24/2017
  • Est. Priority Date: 12/04/2012
  • Status: Active Grant
First Claim
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1. A nasal cannula for therapeutic gas delivered to a patient, comprising:

  • a nitric oxide source;

    an oxygen source;

    a first lumen, a second lumen, and a third lumen;

    the first lumen being a first therapeutic gas lumen for delivering a first therapeutic gas comprising nitric oxide from the nitric oxide source to the patient,the second lumen being a triggering lumen, andthe third lumen being a second therapeutic gas lumen for delivering a second therapeutic gas comprising oxygen from the oxygen source to the patient; and

    a cannula nosepiece allowing separate flow paths to the patient for each of (i) the first therapeutic gas lumen, (ii) the triggering lumen, and (iii) the second therapeutic gas lumen; and

    wherein the cannula nosepiece comprises a nitric oxide flow path having an inner diameter that is smaller than an inner diameter of the first therapeutic gas lumen.

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