| abstract |
The invention relates to a device for determining measurement values describing the function of the lungs or the respiratory system of a patient, said device comprising, as device elements, a mouthpiece (1) comprising a tube for introducing respiratory air and for sucking in air, and a gas measurement chamber (2, 3), with at least one of the following gas sensors being arranged in the gas measurement chamber (2, 3) to determine the relevant measurement values: nitrogen monoxide sensor, carbon dioxide sensor, oxygen sensor, carbon monoxide sensor, multi-gas sensor, sensor for volatile organic compounds (such as alkane sensor, alkene sensor, aldehyde sensor), alkane sensor, infrared sensor and/or fibre optic sensor and/or resistance sensor and/or semiconductor sensor, the gas measurement chamber (2, 3) being separated by a closable opening into a first gas measurement chamber (2) and a second gas measurement chamber (3), the second gas measurement chamber (3) being a chamber that is closed off or can be closed off. The closable opening opens a first flow path (22) from the first gas measurement chamber (2) into the second gas measurement chamber (3) on exhalation and thus introduction of respiratory air into the device. At least one gas sensor is arranged in the second gas measurement chamber (3). |