Oro/nasopharyngeal airway for administering/sampling inhalent/ex

Details Oro/nasopharyngeal airway for administering/sampling inhalent/ex Oro/nasopharyngeal airway for administering/sampling inhalent/ex

1997-12-05

1999-08-17

Weiss, John G.

Surgery

Respiratory method or device

Respiratory gas supply means enters mouth or tracheotomy...

12820026, 12820125, 12820718, 128911, A61M 1600

Patent

active

059378581

ABSTRACT:
An oro
asopharyngeal airway comprises an arcuately shaped tubular member adapted for insertion into a patient's pharynx, either through the mouth or nasal passage, to prevent obstruction during the administration of anesthesia. According to a preferred embodiment, an inhalant gas, typically oxygen (O.sub.2), is delivered to the airway via a gas line connected to the proximal end of the tubular member, while expired carbon dioxide (CO.sub.2) is sampled in the patient's pharynx via a second gas line connected to the tubular member in the vicinity of its distal end. Preferably, the respective inhalant and expired gas lines are positioned within the interior of the tubular member and are integral parts thereof Alternatively, the airway defines two discrete and parallel lumens or conduits, one being adapted to be connected to an inhalant gas supply, and the other being adapted to be connected to a gas level-sensing device.

REFERENCES:
patent: 4256099 (1981-03-01), Dryden
patent: 4300550 (1981-11-01), Gandi et al.
patent: 4821715 (1989-04-01), Downing
patent: 5143062 (1992-09-01), Peckham
patent: 5555890 (1996-09-01), Schaller
patent: 5765558 (1998-06-01), Psaros et al.

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