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Windpipe size may predict oxygen trouble during lung procedure

NCT ID NCT07587736

Knowledge-focused Sponsor: Ankara Ataturk Sanatorium Training and Research Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study will observe 300 adults scheduled for a lung biopsy (EBUS-TBNA) to see if the size of their windpipe, measured by ultrasound before the procedure, can predict dangerous drops in oxygen levels. The procedure is done under sedation, and low oxygen is a known risk. The goal is to find a simple way to identify high-risk patients and improve safety.

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 help doctors identify patients at higher risk for low oxygen during EBUS-TBNA, allowing them to take extra precautions.
What could go wrong
This is an observational study, not a treatment trial. It only looks for a link between tracheal size and oxygen drops; it won't test any new therapy or device.

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 300 people

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

Expected to start

May 2026

An estimate. Start dates often move.

Expected to finish

May 2027

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

This study will be conducted in accordance with the Declaration of Helsinki and will be carried out at SBÜ Ankara Atatürk Sanatoryum Training and Research Hospital. In patients aged 18 years and older scheduled to undergo EBUS-TBNA, the narrowest pre-procedural tracheal diameter will be determined. The relationship between tracheal diameter and the development of hypoxemia will be analyzed.

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 scheduled for elective EBUS-TBNA * Patients who provide written informed consent * Patients with ASA physical status I-III * Patients aged ≥18 years Exclusion Criteria: * Tracheal stenosis or significant airway obstruction * History of tracheostomy * Use of home oxygen therapy * Pre-procedural SpO₂ \< 90% on room air * History of prior thoracic surgery * Diagnosis of congestive heart failure * Presence of pleural effusion * FEV1 \< 40% * COPD patients classified as GOLD stage 3-4 * Restrictive lung disease (FVC \< 50%) * Advanced pulmonary hypertension * History of surgery affecting neck anatomy * Tracheal deviation due to large thyroid or mediastinal mass * ASA physical status IV * Pregnancy * EBUS performed under general anesthesia (with endotracheal intubation or laryngeal mask airway) * Hemodynamic instability

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Conditions

The condition(s) this trial relates to.

Hypoxia tracheal disorder

As listed by the trial registrant

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

Endobronchial ultrasound - transbronchial needle aspiration Hypoxemia Trachea

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

  • Ankara Ataturk Sanatorium Training and Research Hospital, Ankara, 06280

    Ankara, Turkey (Türkiye)

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