Allergy skin testing |
Rhinoscopy |
Sinus radiography/computed tomography |
Sputum bacteriological testing |
Therapeutic trial of GERD with proton pump inhibitor or pH probe |
Sleep studies |
Precipitins for Aspergillus |
Pulmonary function tests (including lung volume and DL,CO) |
Chest radiography/computed tomography |
Bronchoscopy with or without bronchoalveolar lavage |
Laryngoscopy |
Psychological evaluation |
Induced sputum cell counts |
Additional tests may be required. GERD: gastro-oesophageal reflux disease; DL,CO: diffusion capacity of the lung for carbon monoxide.