Apparatus for collection of airway gases
First Claim
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1. An apparatus for collecting airway gases, comprising:
- a mouthpiece through which a user in use exhales to deliver a gas flow therethrough, wherein the mouthpiece is configured to provide a resistance to exhalation which is such as to cause closure of the oropharyngeal velum of the user on exhalation therethrough;
a first nosepiece which is fluidly connected to the mouthpiece for fitting to one nostril of the user;
a second nosepiece for fitting to the other nostril of the user;
a collection device which is fluidly connected to the second nosepiece for collecting airway gases as delivered from the second nosepiece; and
a scrubber which is fluidly connected to the mouthpiece for removing one or more gases from the gas flow as delivered to the first nosepiece.
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Abstract
The invention relates to an apparatus for collection of airway gases from a subject comprising a first means for producing closure of the velum of the subject, and a second means for collection of the airway gases, wherein the first and second means need not be integral with each other.
139 Citations
36 Claims
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1. An apparatus for collecting airway gases, comprising:
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a mouthpiece through which a user in use exhales to deliver a gas flow therethrough, wherein the mouthpiece is configured to provide a resistance to exhalation which is such as to cause closure of the oropharyngeal velum of the user on exhalation therethrough; a first nosepiece which is fluidly connected to the mouthpiece for fitting to one nostril of the user; a second nosepiece for fitting to the other nostril of the user; a collection device which is fluidly connected to the second nosepiece for collecting airway gases as delivered from the second nosepiece; and a scrubber which is fluidly connected to the mouthpiece for removing one or more gases from the gas flow as delivered to the first nosepiece.
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2. An apparatus for collecting airway gases, comprising:
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a mouthpiece through which a user in use exhales to deliver a gas flow therethrough, wherein the mouthpiece is configured to provide a resistance to exhalation which is such as to cause closure of the oropharyngeal velum of the user on exhalation therethrough; a first nosepiece which is fluidly connected to the mouthpiece for fitting to one nostril of the user; a second nosepiece for fitting to the other nostril of the user; a collection device which is fluidly connected to the second nosepiece for collecting airway gases as delivered from the second nosepiece; and a further collection device which is fluidly connected between the mouthpiece and the first nosepiece for collecting one or more gases from the gas flow as delivered to the first nosepiece, wherein the further collection device comprises a condenser.
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3. A method of collecting airway gases, comprising the steps of:
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a user exhaling through a mouthpiece to deliver a gas flow therethrough, wherein the mouthpiece is configured to provide a resistance to exhalation which is such as to cause closure of the oropharyngeal velum of the user on exhalation therethrough; fitting a first nosepiece, which is fluidly connected to the mouthpiece, to one nostril of the user; fitting a second nosepiece to the other nostril of the user; and collecting airway gases as delivered from the second nosepiece in a collection device which is fluidly connected thereto. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of collecting airway gases, comprising the steps of:
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a user exhaling into a mouthpiece, wherein the mouthpiece is configured to provide a resistance to exhalation which is such as to cause closure of the oropharyngeal velum of the user on exhalation thereinto; fitting a nosepiece to one nostril of a nasal airway of the user; providing a gas flow through the nasal airway of the user from the other nostril to the one nostril of the user while the oropharyngeal velum of the user is closed; and collecting airway gases as delivered from the nosepiece in a collection device which is fluidly connected thereto. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification