A Diagnostic Accuracy Study: N-Tidal Assessment for Respiratory Diagnosis Compared to Using Standard Testing
Sponsor: Liverpool Heart and Chest Hospital NHS Foundation Trust
Trial Details
| Condition | Asthma (Diagnosis), COPD (Chronic Obstructive Pulmonary Disease) |
| Intervention | Partial pressure of CO2 during tidal breathing; FENO; Spirometry |
| Status | Not_yet_recruiting |
| Participants | 1,200 |
| Est. Completion | 19 Dec 2026 |
| Last Updated | 24 Apr 2026 |
Primary Outcome
Diagnostic accuracy of the diagnostic algorithms of N-Tidal Diagnose 1; Diagnostic accuracy of prototype diagnostic algorithms
Eligibility Criteria
Inclusion Criteria
Inclusion Criteria: * Age ≥ 18 years * Referred for respiratory diagnostic testing with a clinical suspicion of asthma or COPD * Participant is willing and able to provide informed consent Exclusion Criteria: * Referred for respiratory diagnostic testing for a condition other than asthma or COPD, with no mention in the referral of a clinical suspicion of COPD or asthma * Participants who, in the opinion of the chief investigator, or their delegate, are unlikely to comply with the requirements of the study * Inability to give written informed consent * Participants who are acutely unwell * Patients unable to breathe through their mouths e.g. tracheostomy patients
Trial Sites
Countries
This content is for educational purposes for healthcare professionals only and does not constitute clinical advice. Clinical decisions should be based on individual patient assessment, current guidelines, and appropriate specialist consultation. Editorial Standards · Privacy Policy · Terms of Service