Sweat test/cystic fibrosis genetics | Exclude cystic fibrosis, diagnose non-classical cystic fibrosis |
Immune function |
| White cell differential |
| Hypogammaglobulinaemias |
| Functional antibody problems |
| Part of complement pathways |
24 h pH study/impedence study |
Barium meal | Gastro-oesophageal reflux |
Videofluoroscopy | Aspiration |
Flexible bronchoscopy | Foreign body, malacia, abnormal anatomy |
Bronchoalveolar lavage | Microbiological investigations
Fat laden macrophages – aspiration |
Nasal nitric oxide±ciliary biopsy | Primary ciliary dyskinesia |