FEV1 = Det forcerede udåndingsvolumen i første sekund er det volumen, som udåndes i det første sekund efter en maksimal indånding. 2019 May;64(5):570-575. doi: 10.4187/respcare.06131. To find the normal range ofthe FEV,., aruler should belaidacross thechart sothattheedgecorresponds withthe knownFVC(shownonboth sides). It's used as a common indexes in the diagnosis of airway obstructive and restrictive lung disease. Background Forced expiratory volume in 1 s as a percentage of predicted (%FEV1) is a key outcome in cystic fibrosis (CF) and other lung diseases. 0 is the lower endofthenormalrange, sothe 50th, 10th, and3rd centiles havebeenshown. Patients showing a BMI within the normal range (i.e. The normal value for this ratio is above 0.75-85, though this is age dependent. FEV 1 PREDICTED VALUES MALE CAUCASIAN Figures based on prediction equations from Hankinson et al. When compared to the reference value, a lower measured value corresponds to a more severe lung abnormality. FEV1/FVC. Normal Fev1 should be above 80 percent. According to the European Respiratory Society (ERS) criteria, a FEV1% predicted of less than 88% (in men) and 89% (in women) defines when a patient has COPD. Race. If the FVC and the FEV1 are within 80% of the reference value, the results are considered normal. Mini -Wright Single Patient Use (Standard Range) Part Ref: 3103388 EU scale (EN 13826) Multiple Patient Use Part Ref: 3103387 Blue text on a yellow NHS Logistics580 Quanjer PH, Stanojevic S, Cole TJ, et al. Severe: FEV 1 /FVC<0.7, 30% predicted