Cannula for minimizing dilution of dosing during nitric oxide delivery
First Claim
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1. A nasal cannula for therapeutic gas delivered to a patient in need thereof, comprising:
- 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 to a patient in need thereof,the second lumen being a triggering lumen, andthe third lumen being a second therapeutic gas lumen for delivering a second therapeutic gas comprising oxygen to the patient; and
a cannula nosepiece allowing separate flow paths to the patient for (i) the first therapeutic gas lumen, (ii) the triggering lumen, and (iii) the second therapeutic gas lumen; and
wherein the first lumen has an inner diameter that is smaller than inner diameters of the second lumen and third lumen but larger than an inner diameter of the flow path for the first lumen at the cannula nosepiece.
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Abstract
The present invention generally relates to, amongst other things, systems, devices, materials, and methods that can improve the accuracy and/or precision of nitric oxide therapy by, for example, reducing the dilution of inhaled nitric oxide (NO). As described herein, NO dilution can occur because of various factors. To reduce the dilution of an intended NO dose, various exemplary nasal cannulas, pneumatic configurations, methods of manufacturing, and methods of use, etc. are disclosed.
617 Citations
18 Claims
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1. A nasal cannula for therapeutic gas delivered to a patient in need thereof, comprising:
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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 to a patient in need thereof, the second lumen being a triggering lumen, and the third lumen being a second therapeutic gas lumen for delivering a second therapeutic gas comprising oxygen to the patient; and a cannula nosepiece allowing separate flow paths to the patient for (i) the first therapeutic gas lumen, (ii) the triggering lumen, and (iii) the second therapeutic gas lumen; and wherein the first lumen has an inner diameter that is smaller than inner diameters of the second lumen and third lumen but larger than an inner diameter of the flow path for the first lumen at the cannula nosepiece. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A nasal cannula for therapeutic gas delivered to a patient in need thereof, comprising:
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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 to a patient, the second lumen being a triggering lumen for triggering release of a pulse of the first therapeutic gas, and the third lumen being a second therapeutic gas lumen for delivering a second therapeutic gas comprising oxygen to the patient; the first therapeutic gas lumen, the triggering lumen, and the second therapeutic gas lumen aggregating at a cannula nosepiece, the cannula nosepiece allowing separate flow paths to the patient for each of the first therapeutic gas lumen, the triggering lumen, and the second therapeutic gas lumen; and the first therapeutic gas lumen having an inner diameter that is (i) smaller than an inner diameter of the second therapeutic gas lumen and an inner diameter of the triggering lumen and (ii) larger than an inner diameter of the flow path for the first therapeutic gas lumen at the cannula nosepiece. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification