further investigations
Last edited 08/2022 and last reviewed 08/2022
Further investigations in cystic fibrosis include:
- sputum culture
- skin test for aspergillus as 20% develop allergic bronchopulmonary aspergillosis
- chest radiography
- pulmonary function tests:
- there may be an obstructive defect causing a reduction in FEV1 and FVC
- the FEV1/FVC ratio is reduced
- FEF 25 – 75%
- in severe cases arterial blood gas sampling shows chronic hypoxia and hypercapnia
- glucose tolerance test
- malabsorption screen.
Reference:
- (1) NICE (October 2017) Cystic Fibrosis. Available at https://www.nice.org.uk/guidance/ng78. (Accessed on 05 June 2022)
- (2) NHS (2021) Cystic Fibrosis. Available at https://www.nhs.uk/conditions/cystic-fibrosis/. (Accessed on 05 June 2022)