| 摘要 |
The invention relates to a portable pneumotachograph for determining components in an expiration volume, comprising a processor (4), a PEEP valve (5) attached on the pneumotachograph (1) at the exhalation side, a filter (6) attached on the pneumotachograph (1) at the inhalation side for removing the portion of components to be determined in the inspiration air, at least one sampling unit (8) attached in or on the pneumotachograph tube (2), a valve (10) connected to the sampling unit (8), at least one sensor (7) provided outside of the pneumotachograph tube for determining one of the components in the expiration volume, and a pump (13) disposed downstream of the sensor (7), wherein a chemically and/or physically modified hose (18), which is enclosed by a climate control chamber (15) for conditioning the sample gas and/or calibration gas flowing through the hose (18), is provided between the valve (10) and the sensor (7), wherein the sample and/or calibration gases to be conditioned can be conducted in the hose through the climate control chamber, and in the climate control chamber (15) a defined gas atmosphere can be set such that by means of the climate control chamber (15) the relative humidity and/or the temperature and/or the composition of the sample and/or calibration gas flowing through the hose (18) can be set to predefined parameters. |
