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Which blade size works best for intubation? large study seeks answers

NCT ID NCT06232837

Knowledge-focused Sponsor: University Hospital, Clermont-Ferrand Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This completed study looked at over 3,000 adults having surgery to see which size of Macintosh blade (a tool used to guide a breathing tube into the windpipe) works best. The goal was to find out if blade size affects how often the tube goes in on the first try and how often serious problems like low oxygen or low blood pressure occur. The results could help doctors choose the right blade size for safer intubation.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this study could help doctors choose the best blade size for safer, faster intubation in routine surgeries.
What could go wrong
This is an observational study, not a controlled trial, so it can show patterns but not prove cause and effect. Results may not apply to all patients or settings.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

3,058 people

The number who actually took part.

Started

Jan 2024

Finished

Sep 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Any patient requiring orotracheal intubation with direct laryngoscopy in first place

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patients must be admitted in a participating operative room and require mechanical ventilation through an orotracheal tube. * Adult (age ≥ 18 years) * Subjects must be covered by public health insurance * Written informed consent from the patient or proxy (if present) before inclusion or once possible when patient has been included in a context of emergency. Exclusion Criteria: * Anticipated difficult intubation requiring videolaryngoscopy or other technic in first place * Nasotracheal intubation * Refusal of study participation or to pursue the study by the patient * Absence of coverage by the French statutory healthcare insurance system * Protected person

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Endotracheal intubation Intubation complication Intubation; difficult or failed

Contacts and locations

Locations

  • CHU Clermont-Ferrand

    Clermont-Ferrand, 63000, France

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