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Characterization and interpretation of forced expiration

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Abstract

Forced expiration is the most widely used test for assessing pulmonary mechanics in man. For clinical purposes, results can be described in terms of the forced vital capacity (FVC) and the forced expiratory volume in 1 sec (FEV1). In order to provide a more complete description of forced expiration, additional parameters have been applied, e.g., flows at various lung volumes (flow volume loops) and the distribution of transit times during lung emptying (moments).

In an ongoing epidemiological study we found that age, sex, smoking, socioeconomic status, ABH secretor status, protease inhibitor type, and familial COPD contribute to airways obstruction. We also found that characteristic patterns of obstruction provide insight into risk factors and the pathophysiology of disease.

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Supported by NIH-HL 14153 and HL 00461

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Menkes, H., Cohen, B., Permutt, S. et al. Characterization and interpretation of forced expiration. Ann Biomed Eng 9, 501–511 (1981). https://doi.org/10.1007/BF02364767

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