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Which oxygen level is safer when waking from anesthesia?

NCT ID NCT04879290

Knowledge-focused Sponsor: University Hospital, Caen 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether giving 50% or 100% oxygen before removing a breathing tube after anesthesia leads to fewer drops in oxygen levels. 119 patients were monitored after surgery. The goal is to find the safest oxygen setting to prevent breathing problems during recovery.

What this could mean

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

Active substance
oxygen
What this could lead to
If it works, this could help standardize safer oxygen levels during anesthesia recovery, reducing breathing complications.
What could go wrong
This is a small, completed trial with 119 patients, so results may not apply to all surgeries or patient types. The difference between oxygen levels may be small.

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

119 people

The number who actually took part.

Started

Apr 2021

Finished

Aug 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 undergoing general anesthesia, with invasive mechanical ventilation including an airway device (supraglottic airway device or tracheal tube) at their arrival in PACU. * ASA physical status classification 1, 2, or 3 stabilized. * Surgery performed in emergency operating room department including vascular, digestive, urological and minor trauma surgery or surgery performed in head and neck anesthesia pole block including anterior cervical spine, lumbar disc herniation, cranioplasty, nerve stimulator, vertebroplasty, narrow lumbar canal, simple arthrodesis (less than or equal to two stages), otological, ophthalmological and skin surgery. Exclusion Criteria: * Per-operative hemodynamic instability. * Patients with a BMI greater than 35. * Patients classified as difficult to intubate and / or ventilate. * Heavy surgeries (operating time greater than 4 hours). * Patient requiring postoperative non invasive mechanical ventilation * Patients with diagnosed COPD * SPO2 in room air \< 96% before the intervention. * Any patient under guardianship. * Pre-operative and / or intra-operative morphine intake. * Surgical management of the upper airways (ex : tonsillectomy) * Pregnant and lactating women.

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Conditions

The condition(s) this trial relates to.

Hyperoxia Hypoxia Postoperative Complications Pulmonary Atelectasis

As listed by the trial registrant

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

Anesthesia Atelectasis Hyperoxia Hypoxemia Postoperative complications

Contacts and locations

Locations

  • University Hospital, Caen

    Caen, 14033, France

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