Apparatus and method for respired gas collection and analysis
First Claim
1. Apparatus for collecting, transporting, sampling and analyzing nasal and oral gases respired by a patient, said apparatus comprisingcannula means constructed and arranged for placement in at least one of the patient'"'"'s nares,said cannula means having at least one opening distal from the patient'"'"'s nare for conducting respired nasal gases,a nasal respired gas conduit having at least two spaced openings, with one of said openings connected in fluid communication with the respired gas opening of the cannula means and the other end of said nasal respired gas conduit connected to respired gas distribution means,oral respired gas capture means for placement near the patient'"'"'s mouth,said oral respired gas capture means comprising a hollow member having at least one aperture therein to permit aggregation of oral respired gases therein and having at least one effluent opening for the removal of oral respired gases therefrom, andan oral respired gas conduit independent from said nasal respired gas conduit, having at least two spaced openings therein, with one of said openings connected in fluid communication with the effluent opening of said oral respired gas capture means and the other end of said oral respired gas conduit connected to said respired gas distribution means.
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Accused Products
Abstract
Apparatus and method for selective, separate or simultaneous collection and analysis of nasal gases and oral gases, and mixtures thereof, respired by a patient, with optional simultaneous delivery to the patient of selected inhalant gases. The apparatus comprises a nasal gas cannula and an oral gas capture member constructed and arranged to avoid or minimize contact with the patient'"'"'s mouth and other facial surfaces.
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Citations
18 Claims
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1. Apparatus for collecting, transporting, sampling and analyzing nasal and oral gases respired by a patient, said apparatus comprising
cannula means constructed and arranged for placement in at least one of the patient'"'"'s nares, said cannula means having at least one opening distal from the patient'"'"'s nare for conducting respired nasal gases, a nasal respired gas conduit having at least two spaced openings, with one of said openings connected in fluid communication with the respired gas opening of the cannula means and the other end of said nasal respired gas conduit connected to respired gas distribution means, oral respired gas capture means for placement near the patient'"'"'s mouth, said oral respired gas capture means comprising a hollow member having at least one aperture therein to permit aggregation of oral respired gases therein and having at least one effluent opening for the removal of oral respired gases therefrom, and an oral respired gas conduit independent from said nasal respired gas conduit, having at least two spaced openings therein, with one of said openings connected in fluid communication with the effluent opening of said oral respired gas capture means and the other end of said oral respired gas conduit connected to said respired gas distribution means.
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2. Apparatus for collecting, transporting, sampling and analyzing gases respired by a patient, said apparatus comprising
cannula means constructed and arranged for placement in at least one of the patient'"'"'s nares, said cannula means having at least one opening distal from the patient'"'"'s nare for conducting respired nasal gases, and a nasal respired gas conduit having at least two spaced openings, with one of said openings connected in fluid communication with the respired gas opening of the cannula means and the other end of said nasal respired gas conduit connected to respired gas distribution means, and oral respired gas capture means suspended from said cannula means near the patient'"'"'s mouth, and said oral respired gas capture means having a hollow member having at least one aperture therein, constructed and arranged to permit aggregation of oral respired gases therein and having at least one effluent opening for the removal of oral respired gases therefrom, and an oral respired gas conduit having at least two spaced openings therein, with one of said openings connected in fluid communication with the effluent port of said oral respired gas capture means and the other end of said oral respired gas conduit connected to said respired gas distribution means.
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13. A method for selective collection and analysis of gas respired by a patient comprising
collecting nasal respired gas in the patient'"'"'s nare, and collecting oral respired gas, and separately conducting each of said oral respired gas and said nasal respired gas to a distribution zone, and conducting from said distribution zone a sample gas comprising one or more gases selected from a class of gases including said nasal respired gas, and said oral respired gas, and a mixture of said nasal respired gas and said oral respired gas, and analyzing said sample gas for the presence and concentrations of preselected constituents.
Specification