Device for determining the levels of NO in exhaled air
DCFirst Claim
1. Device for determining the level of nitric oxide generated within the body of a living organism in an exhaled airstream belonging to the living organism selected to have its lung function evaluated, said device including a measuring device arranged to determine a current portion of said generated nitric oxide and/or a distribution of said generated nitric oxide over time during an exhalation phase, a first fluid path which allows a first portion of exhaled air from the organism during a commencing period of the exhalation phase to pass with no or with only a very small resistance or back-pressure to a free space, and a second fluid path which allows a second portion of the exhaled air from the organism during a remaining duration of the exhalation phase to pass through said measuring device against a resistance or back-pressure so that the level of said generated nitric oxide in the second portion of the exhaled air can be measured.
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Abstract
A device for determining the level of nitric oxide in an exhaled airstream belonging to a living organism selected to have its lung function evaluated, where an initial device is arranged to determine the current portion of nitric oxide and/or the distribution of nitric oxide over time during an exhalation phase. During the commencing period of the exhalation phase, the exhaled air is arranged to pass with no or with only a very small resistance or back-pressure to a free space, and during the remaining period, the exhaled air is arranged to pass through the initial device against the action of a suitable resistance or back-pressure. The level of nitric oxide is measured during this remaining period.
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Citations
19 Claims
- 1. Device for determining the level of nitric oxide generated within the body of a living organism in an exhaled airstream belonging to the living organism selected to have its lung function evaluated, said device including a measuring device arranged to determine a current portion of said generated nitric oxide and/or a distribution of said generated nitric oxide over time during an exhalation phase, a first fluid path which allows a first portion of exhaled air from the organism during a commencing period of the exhalation phase to pass with no or with only a very small resistance or back-pressure to a free space, and a second fluid path which allows a second portion of the exhaled air from the organism during a remaining duration of the exhalation phase to pass through said measuring device against a resistance or back-pressure so that the level of said generated nitric oxide in the second portion of the exhaled air can be measured.
Specification