Rubinsztajn, Renata; Wrotek, Katarzyna; Wawrzeniuk, Anna
December 2007
Problemy Terapii Monitorowanej;dec2007, Vol. 18 Issue 4, p209
Academic Journal
Background. According to the ERS/ATS recommendations (2005) FEV6 (forced expiratory volume in 6 second) measurement seems to be more reproductible than the measurement of FVC. However, some patients may not be able to produce prolonged (i.e. minimum 6s) expirations. Aim of the study. Evaluate the forced expiration time (FET) and the possibility to calculate FEV6, as recommended by ERS/ATS, in patients with asthma. Material and methods. The study group consisted of 399 patients with asthma (240 F, 159M), in the mean age 47,24±18,87 years. Spirometry was performed with the standard protocol according to the ERS/ATS guidelines (Lungtest 1000, MES, Poland). Results. The value FET≥6s was obtained only in 76 subjects (19,0%); 60 patients (15,0%) achieved FET<3s. In this group the obturation have 70 patients (the severe and very severe 20 ones). In the group with FET>6s the statistical important correlation were found between FEV6 and FEV1; FVC and age. Conclusion. 1. Calculation of FEV6 based on spirometry is possible in the limited group of patients and therefore it is difficult to verity if its measurement is more reproducible than the measurements of FVC. 2. In asthmatic patients with airflow limitation FET>6s is achieved more frequently than in patients with no changes in spirometry. 3. Patients education may play the important role in the better technical quality of spirometry.


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