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Breathalyzer for anesthesia: new study seeks safer surgery sleep

NCT ID NCT07272044

Knowledge-focused Sponsor: Second Affiliated Hospital, School of Medicine, Zhejiang University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 explores whether analyzing a patient's exhaled breath can accurately measure the depth of anesthesia during surgery. Researchers will compare breath concentrations of two common anesthetics with standard brain wave monitoring (BIS) in 500 adults. The goal is to develop a non-invasive method to manage anesthesia for patients who cannot use standard monitors.

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

About 500 people

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

Started

Mar 2024

Expected to finish

Mar 2029

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.

Who is studied

Patients who underwent general anesthesia for the first time and combined intravenous and inhalational anesthesia

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: * Age ≥18 years old * ASA I-III * Expected duration of surgery \> 1 hour * Radial artery catheterization was performed * Patients requiring BIS monitoring. Exclusion Criteria: * Patients with contraindications to general anesthesia * mental disorder, unable to answer * long-term use of antiepileptic drugs and psychotropic drugs * pregnant patients * patients refused to participate * the investigator thought that the study was not suitable for inclusion * patients who did not wake up in PACU

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As listed by the trial registrant

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

Anesthesia

How to take part

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  1. The places running it

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  2. The official record

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Contacts and locations

Locations

  • Second Affiliated Hospital, School of Medicine, Zhejiang University

    RECRUITING

    Hangzhou, Zhejiang, China

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