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New combo test aims to spot tough airways before surgery

NCT ID NCT07642206

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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

Summary

This study will test whether combining an ultrasound measurement of the neck with a simple lip bite test can predict difficult airway in 134 obese adults undergoing surgery. Participants will have their hyomental distance measured in different head positions and perform the upper lip bite test. The goal is to see if this combo is more accurate than standard methods at identifying patients who may be hard to intubate.

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 could give doctors a simple, non-invasive way to predict difficult airways in obese patients, improving safety during anesthesia.
What could go wrong
This is a small observational study, not a treatment trial. The test may not be accurate enough in practice, and 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.

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 134 people

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

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Mar 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 to 65 years

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: * Adult obese patients aged 18 to 65 years. * Both sexes. * American Society of Anesthesiologists (ASA) physical status II- III. * Body Mass Index (BMI) ≥ 30 kg/m² (classified as obese). * Scheduled for elective surgical procedures requiring general anesthesia with endotracheal intubation. * Ability to understand and provide informed written consent. * Cooperative and able to perform the ULBT on command. * Normal dentition (presence of upper and lower incisors to perform ULBT accurately). Exclusion Criteria: * History of maxillofacial trauma, surgery, or congenital facial anomalies affecting mandibular movement or neck anatomy. * Known or suspected difficult airway requiring awake intubation. * Patients with limited neck mobility (e.g., cervical spine disease or immobilization). * Temporomandibular joint disorders or restricted mandibular mobility. * Pregnancy.

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As listed by the trial registrant

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

Airway assessment

How to take part

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

  1. The places running it

    1 site. 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

  • Kasr Al-Ainy Hospital, Cairo University

    Cairo, Cairo Governorate, Egypt

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