Measuring airway opening during out-of-hospital cardiac arrest
Official title: Measurement of Airway Opening Index During Out-of-hospital Cardiac Arrest: The Lazarus AOI Trial.
Run by University Hospital, Ghent · NCT07438938 · Data updated 2026-11-12
This project tests whether the Airway Opening Index (AOI) measured from capnograms during CPR in adults with out-of-hospital cardiac arrest is common and linked to return of spontaneous circulation.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 150 (estimated) |
| Sponsor | University Hospital, Ghent Academic / other |
| Locations | 1 site (Ghent, East-Flanders) |
| Status | Recruiting |
| Started | October 1, 2022 |
| Main results expected | September 30, 2026 |
| Study ends | January 1, 2027 |
| Registry record updated | February 27, 2026 |
| Trial ID | NCT07438938 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults who had an out-of-hospital cardiac arrest, were intubated during CPR, and have available immediate post-intubation capnogram recordings are the intended cases for analysis.
✕Probably not a fit
Patients who were not intubated, who did not receive CPR after intubation, or whose capnogram recordings are technically unusable are not eligible and would not benefit from this analysis.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This retrospective observational cohort uses capnography recordings from about 150 adult out-of-hospital cardiac arrest cases logged in the Lazarus database at Ghent University Hospital. The Airway Opening Index (AOI) will be calculated from capnograms obtained immediately after intubation to quantify airway closure during CPR. The analysis will report AOI prevalence, examine correlations between AOI and return of spontaneous circulation (ROSC), and explore how applied positive airway pressures relate to AOI and outcomes. Results are intended to clarify whether AOI can serve as a CPR quality metric or prognostic indicator.
Why it matters
Potential benefit: If successful, this work could provide a simple capnogram-derived marker to help predict ROSC and guide ventilation strategy during CPR.
How similar studies have gone: Capnography patterns and airway closure have been described in prior work, but using a standardized Airway Opening Index (AOI) as a prognostic or quality metric remains relatively novel and not yet widely validated.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Adult (over 18 years old) patients with out-of-hospital cardiac arrest. * Patients undergoing cardiopulmonary resuscitation (CPR). * Patients who were intubated and had available capnogram recordings immediately after intubation. Exclusion Criteria: * Patients that were not intubated * Patients that did not receive CPR following intubation * Cases with a technical challenge with the ETCO₂ measurement (i.e., issues with waveform data of the capnogram.
Where it's running
-
Ghent University Hospital
Ghent, East-Flanders, Belgium Recruiting
Study contacts
- Study coordinator: Said Hachimi Idrissi, MD, PhD
- Email: SAID.HACHIMIIDRISSI@ugent.be
- Phone: 0032 9 332 50 24
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.