Patent ID: 9381317
Filing Date: 2016-07-05
CPC Classification: A61M

Claim Text:
1. A nasal cannula for delivery of respiratory gases supplied from a respiratory gas delivery system, the nasal cannula comprising: at least two nasal inserts, wherein at least one nasal insert is structured to allow the respiratory gases to be supplied through a lumen and exhaled gases to be substantially exhausted about at least one flange during use; and the at least one flange coupled to at least one nasal insert, the at least one flange adapted to position within a nasal passage and having a non-sealing structure that avoids creating a seal in the nasal passage, the at least one flange adapted to partially impede the egress of respiratory gasses delivered to an upper airway of a patient, wherein the at least one flange includes a top surface defining a corresponding top surface area; and wherein the at least one flange further includes at least one slot defining a corresponding implicit surface area, the top surface area of the top surface being substantially greater than the implicit surface area of the at least one slot.