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Warm oxygen may shield patients from Post-Surgery breathing danger

NCT ID NCT07778420

Disease control Sponsor: Second Affiliated Hospital of Xi'an Jiaotong University 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 21, 2026 · Last updated Sep 02, 2026 · Updated 2 times

Summary

This trial tests whether giving heated and humidified oxygen during recovery from general anesthesia can reduce the chance of early hypoxemia—a dangerous drop in blood oxygen levels—compared to standard room-temperature oxygen. About 2,000 adults undergoing surgery will be randomly assigned to receive one of the two oxygen types through a face mask. The main goal is to see if the heated version lowers the rate of hypoxemia within the first 10 minutes of recovery, which could lead to safer post-surgery care.

What this could mean

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

Active substance
Heated and humidified oxygen therapy delivered via face mask
What this could lead to
If effective, this simple oxygen delivery method could become a standard practice to prevent dangerous drops in blood oxygen levels after surgery, improving patient safety and recovery.
What could go wrong
This is an early-stage trial, and the benefit may be small or not apply to all patients. There is also a risk of nasal discomfort or other minor side effects from the heated oxygen.

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

About 2,000 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Dec 2027

An estimate. End dates often move.

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: 1. Age ≥ 18 years 2. Undergoing elective or emergency surgery under general anesthesia with endotracheal intubation 3. Ramsay Sedation Score of 2-4 at 1 minute after extubation 4. ASA physical status class I-III 5. Expected PACU stay ≥ 30 minutes 6. Patient or legally authorized representative provides written informed consent Exclusion Criteria: 1. Pre-existing hypoxemia (SpO₂ \< 90% on room air) 2. Pre-existing diagnosis of severe chronic obstructive pulmonary disease (GOLD grade 3-4), interstitial lung disease, or uncontrolled asthma 3. Severe cardiovascular disease (NYHA class III-IV heart failure, unstable angina) 4. Neuromuscular disease affecting respiratory function 5. Maxillofacial surgery, severe spinal deformity, or other contraindications to face mask oxygen therapy or positioning 6. Use of cardiopulmonary bypass during surgery or planned postoperative ICU admission with endotracheal tube in place 7. Known intolerance to heated gas

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Conditions

The condition(s) this trial relates to.

Hypoxia Postoperative Complications

As listed by the trial registrant

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

Anesthesia recovery period Hypoxemia Postoperative complications

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    8 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • General Hospital of Western Theater Command, PLA

    Chengdu, Sichuan, 610083, China

  • Luoyang Central Hospital

    Luoyang, Henan, 471009, China

  • Shaanxi Nuclear Industry 215 Hospital

    Xianyang, Shaanxi, 712000, China

  • Shaanxi Provincial People's Hospital

    Xi'an, Shaanxi, 710068, China

  • Sichuan Cancer Hospital

    Chengdu, Sichuan, 610041, China

  • The Second Affiliated Hospital of Xi'an Jiaotong University

    Xi'an, Shaanxi, 710004, China

  • Xi'an Central Hospital

    Xi'an, Shaanxi, 710003, China

  • Xi'an People's Hospital

    Xi'an, Shaanxi, 710004, China

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Other studies related to the condition(s) this trial covers.