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Can High-Flow oxygen prevent dangerous dips during difficult intubations?

NCT ID NCT03604120

Prevention Sponsor: Nantes University Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 14, 2026 · Last updated Sep 15, 2026 · Updated 1 time

Summary

Researchers compare two ways to deliver oxygen before and during breathing-tube placement in surgery patients who are hard to intubate. One method uses a high-flow nasal cannula, the other uses a standard face mask. The trial measures how often oxygen levels drop below 95% or require rescue ventilation, and tracks complications. It includes 186 adults at risk of difficult intubation.

What this could mean

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

Active substance
high-flow nasal cannula oxygen therapy
What this could lead to
If it works, this could give anesthesiologists a safer way to keep oxygen levels stable when placing a breathing tube in patients with a difficult airway.
What could go wrong
The trial is small and focuses on a specific group of surgical patients, so the approach may not work for everyone or in every hospital. High-flow oxygen can also cause discomfort or nosebleeds.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

186 people

The number who actually took part.

Started

Sep 2018

Finished

Mar 2021

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.

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 18 years of aged and over * And anticipated difficult intubation * And requiring a rapid sequence induction for laryngoscopic intubation * Or requiring a fiberoptic intubation Exclusion Criteria: * BMI \> 35 * Pulse oxymetry \< 90% in ambient air * Haemodynamic instability * Pregnancy * Protected adult * Lack of consent * Patient already enrolled in another randomized study looking forward improving preoxygenation quality.

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As listed by the trial registrant

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

Intubation;difficult

Contacts and locations

Locations

  • Nantes University Hospital

    Nantes, 44093, France

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