Chemistry: analytical and immunological testing – Nitrogen containing – Oxides of nitrogen
Reexamination Certificate
2007-03-20
2007-03-20
Gakh, Yelena G. (Department: 1743)
Chemistry: analytical and immunological testing
Nitrogen containing
Oxides of nitrogen
C436S133000, C436S164000, C436S171000, C422S084000, C422S051000
Reexamination Certificate
active
10338353
ABSTRACT:
A method and an apparatus for measuring the concentration of a specific gas component of a gas mixture including another gas whose concentration is independently known using light absorption spectroscopy are provided. A method and an apparatus for assessing human airway inflammation by measuring the concentration of exhaled NO and CO2present in orally exhaled breath using light absorption spectroscopy are also provided. NO concentration is determined at the time during breath sampling corresponding to a known exhaled CO2concentration. Methods and apparatus are further provided for measuring NO concentration in orally exhaled human breath that analyze breath emanating from the lower airways and lungs, while excluding breath from the nasal cavity. They include steps and apparatus for discarding initially exhaled breath, flowing breath through an analysis chamber using a vacuum pump and flowing breath through an analysis chamber using a vacuum pump at an initial flow rate and later at a flow rate higher than the initial flow rate.
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Jeffers James
Namjou Khosrow
Roller Chad
Ekips Technologies, Inc.
Gakh Yelena G.
Tomlinson & O'Connell PC
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