NASAL CANNULA

摘要

A nasal cannula arrangement for use as part of systems for delivery respiratory gases to a patient is disclosed. The nasal cannula arrangement includes a manifold part adapted to receive gases from a delivery conduit. The manifold includes one but preferably a pair of prongs extending upward and curving towards the rear of the manifold. The prongs are inserted into the nostrils of the patient and deliver gases to a patient. The prongs have a cut out on the rear side of the prongs. The cut out forms a gases outlet in the prongs and are shaped such that the area of the cut out area is greater than the cross sectional area of the prongs at the entry point to the prongs.

主权项

1. A cannula arrangement comprising:
a gases inlet manifold part configured to receive a gases flow; at least one elongate prong in fluid connection with said gases inlet manifold part, said at least one elongate prong being configured to be inserted into one or more airways of a patient, the gases flow passing through said gases inlet manifold part and through said at least one elongate prong; said at least one elongate prong having a rear side and a front side, wherein said rear side is closer to the patient when in use and said front side is further from the patient when in use; face mount parts extending laterally outward from said at least one elongate prong, said face mount parts being adapted to connect to a headgear assembly, said face mount parts being attached to said gases inlet manifold part, said face mount parts being adapted to rest against a portion of a face of the patient to stabilize said cannula arrangement; and said at least one elongate prong has a reinforcing feature to provide structural rigidity to said at least one elongate prong and to prevent collapse of said at least one elongate prong in at least one axis, said reinforcement feature further configured to prevent collapse of said at least one elongate prong in response to a tensile force or a compressive force.