VOL: 99, ISSUE: 47, PAGE NO: 37
WHAT IS IT?
- History of smoking 10-20 cigarettes a day for 20 or more years prior to onset of symptoms.
- Spirometry: forced expiratory volume in one second (FEV1). Obstructive impairment is shown by FEV1 <80 per cent of predicted value and FEV1/FVC (forced expiratory vital capacity) ratio <70 per cent.
- Stopping smoking reduces the rate of decline (BTS, 1997; Kanner, 1996).
- Inhaled bronchodilators - the patient’s inhaler technique should be reviewed regularly.
British Lung Foundation