'Normal' lung function?
- Caucasian man, age 53 yr, standing height 178 cm, has been smoking 20 cigarettes daily for 36 yr
- for over 10 yr daily cough and phlegm
- shortness of breath during exercise
- in autumn/winter exacerbations, occasionally with a wheezy chest.
Spirometry |
||
| index | observed | predicted |
| FEV1 | 2.85 L | 3.92 L |
| FVC | 4.70 L | 4.98 L |
| FEV1%FVC | 61% | 78% |
Your assessment whether this person has airway obstruction is based on:
- FEV1 as a percentage of the predicted value
- FEV1%FVC as a percentage of the predicted value
- Standard deviation score of FEV1
- Standard deviation score of FEV1%FVC