Functional evaluation of breath: spirometry and body plethysmography comparison in people with cystic fibrosis.

[Purpose] The aim of the present study was to establish up-to-date data regarding the lung function of cystic fibrosis (CF) patients. [Subjects and Methods] Forty-eight patients of both genders, with a diagnosis of CF, were recruited. As a result our sample presented, according to the GOLD criteria, 23 patients with mild lung obstruction (FEV1%pred: 89.86), 16 patients with moderate lung obstruction (FEV1%pred: 56.1) and 9 patients with severe obstruction (FEV1%pred: 32.1). [Results] All patients presented normal total lung capacity followed by an important residual volume increase. [Conclusion] Our results were important to illustrate the CF patient's lung functional status and to improve the health system strategy in treating such individuals.