Lost in interpretation: should the highest VC value be used to calculate the FEV1/VC ratio?
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چکیده
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Evaluation of Superiority of FEV1/VC Over FEV1/FVC for Classification of Pulmonary Disorders
Introduction: Forced expiratory value in one score (FEV1)/ Forced vital capacity (FVC) was used in classical literature for primary classifications of pulmonary disorders. American Thoracic Society/ European Respiratory Society guidelines recommended using FEV1/VC instead of FEV1/FVC.The aim of study was determination of the extent of superiority of FEV1/VC over the FEV1/FVC. Materials and Met...
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ABSTRACT A case study from July 1993 to June 1994 was carried out on the 711 persons of a glassplant workers (case), and 133 persons of a manufacturing foodstuffs workers (control). The purpose of this research is to determine the respiratory function due to free silica exposure. Statistical analysis of the spirometry test (18 parameters) show significant differences between averages of VC, F...
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BACKGROUND Spirometric diagnosis of chronic obstructive pulmonary disease (COPD) is based on the ratio of forced expiratory volume in 1 second (FEV1)/vital capacity (VC), either as a fixed value <0.7 or below the lower limit of normal (LLN). Forced vital capacity (FVC) is a proxy for VC. The first aim was to compare the use of FVC and VC, assessed as the highest value of FVC or slow vital capac...
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