Clinical trial Recruiting at 1 site Observational Ages 18 and up

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.

More Cardiac Arrest (CA) trials

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment150 (estimated)
SponsorUniversity Hospital, Ghent
Academic / other
Locations1 site (Ghent, East-Flanders)
StatusRecruiting
StartedOctober 1, 2022
Main results expectedSeptember 30, 2026
Study endsJanuary 1, 2027
Registry record updatedFebruary 27, 2026
Trial IDNCT07438938 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

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.