DEVICE AND METHOD FOR THE DETERMINATION OF NO IN EXHALED AIR

摘要

The invention concerns a device and method for determining the level of nitric oxide in exhaled air, 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 said initial device against the action of a suitable resistance or back-pressure. Further, portions of the exhaled air can be distinguished from the flow of exhaled air by collecting or diverting portions corresponding to fractions or multiples of the estimated dead space of the individual under study.