Cannula For Minimizing Dilution Of Dosing During Nitric Oxide Delivery

摘要

Described are nasal cannulas that improve the precision of the delivered dose for nitric oxide therapy by reducing the dilution of nitric oxide. The nasal cannulas may reduce the total volume and potential for retrograde flow during nitric oxide therapy through the design of the specific dimensions of the flow path and/or having check valves in the nitric oxide delivery line and/or having a flapper or umbrella valve dedicated to nitric oxide delivery. The nasal cannulas may also use materials that limit oxygen diffusion through the cannula walls. The nosepiece for these cannulas may be manufactured by a molding technique.

主权项

1. A nasal cannula for therapeutic gas delivered to a patient, 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 to a patient,the second lumen being a triggering lumen, andthe third lumen being a second therapeutic gas lumen for delivering a second therapeutic gas 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.