[Dependence of airway resistance and intrathoracic gas volume on airflow and respiratory frequency in health adults].
With a routine body plethysmograph with computerized calculation of airway resistance (Rt) and intrathoracic gas volume (IGV) on 11 healthy volunteers the correlations between Rt, IGV, breathing frequency (15-120) and flow (1.4-4.2 l/s) were examined. Rt increases significantly with increasing flow. In the range of clinical examinations with increasing frequency in the range between 15 and 30/min the flow increases only for a small amount. The increase of airway resistance in this range is very small. At an increase of the flow from 1 to 2 l/s an increase of Rt of 20% can be expected. An increase of the flow for 300% (1.25-5.0 l/s) is followed by an increase of Rt for 60%. IGV values are not influenced by these different frequencies and flows.
Marek
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Berufsgenossenschaftliches Forschungsinstitut für Arbeitsmedizin (BGFA), Institut an der Ruhr-Universität Bochum.
Ulmer
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WT
D000328:Adult; D000368:Aged; D000403:Airway Resistance / Q000502:physiology*; D005260:Female; D006801:Humans; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged; D010993:Plethysmography, Whole Body / Q000295:instrumentation; D011650:Pulmonary Alveoli / Q000502:physiology; D012123:Pulmonary Ventilation / Q000502:physiology*; D012016:Reference Values; D012119:Respiration / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted
Abhängigkeit des Strömungswiderstandes und des intrathorakalen Gasvolumens von der Strömung und der Atemfrequenz bei gesunden Erwachsenen.