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Angle β of greater than 80° at the start of spirometry may identify high‐quality flow volume curves |
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| Authors: | Weiying Ren Zhilong Jiang Lei Zhu |
| Affiliation: | 1. Department of Geriatrics, Zhongshan Hospital, Fudan University, Shanghai, China;2. Department of Respiratory Medicine, Zhongshan Hospital, Fudan University, Shanghai, China |
| Abstract: | |
| Keywords: | maximal expiratory flow– volume curve pulmonary function tests quality control spirometry spirometry standardization |