| Abstrakt: |
Spirometric assessment of human lung capacity is usually feasible only under laboratory conditions, using expensive equipment, bicycle ergometers, or treadmills. Hence, it is desirable to develop a portable device to measure the key parameters of the external respiration of a subject under field conditions, with the data saved in the memory on a breath-by-breath basis and then transferred to a computer for further analysis. We have created a portable device consisting of an easy and tiny sensor fastened to a respiratory mask. The sensor is connected with a cable to a tiny device with an LCD screen where the values of pulmonary ventilation ( Ve), expiratory volume ( Vt), and respiratory rate are shown in turn by the choice of the operator. Metrological studies have shown that the instrument error generally did not exceed 5%. [ABSTRACT FROM AUTHOR] |
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