The Different Flow Pattern in Tracheal Stenosis, Bronchospasm and Emphysema
- 1 January 1977
- journal article
- research article
- Published by S. Karger AG in Respiration
- Vol. 34 (1) , 45-49
- https://doi.org/10.1159/000193776
Abstract
We can conclude that the combination of a high FEV2/1 index and a ‘peak-flow-less’ flow-volume loop is characteristic for the presence of proximal airway stenosis and is a reliable means for differentiation against bronchospasm and emphysema. In comparison, the measurement of airway resistance, FEV1 alone, inspiratory shift of mid-breathing level etc., indicate only the presence of airway obstruction, but fail to give specific information for functional differentiation of bronchial obstruction and morphological evidence of proximal airway stenosis.Keywords
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