Diagnosis

Lung Function Tests

Lung function tests are used to monitor a patient's respiratory function over time and clinical changes in the lung, such as increased mucus production. Changes in lung function test results can signal an exacerbation and the need for intervention.³

Spirometry in patients with CF shows reduced airflow rates, including a reduction in FEV₁ and FEV₁/FVC ratio. The ratio of residual volume to total lung capacity is often increased.³
Based on lung function tests, more than 60% of adult patients with CF are characterized as having moderate or severe lung disease.¹

Source: Adapted from; Cystic Fibrosis Foundation. Patient Registry Annual Data Report. 2005.⁸

Learn more about:

>> Spirometry Testing

>> Pulmonary Function Tests

References:
1. Boucher RC. Cystic Fibrosis. In: Kasper DL, Braunwald E, Fauci AS, Hauser SL, Longo DL, Jameson JL et al., editors. Harrison's Internal Medicine. 16th ed. New York: McGraw-Hill; 2005. p. 1-9.
3. Welsh M. Cystic Fibrosis. In: Goldman L, Ausiello D, eds. Cecil Textbook of Medicine. 22nd ed. Philadelphia: WB Saunders; 2004. p. 1-22.
8. Cystic Fibrosis Foundation. Patient Registry Annual data Report. 2005.