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Can ultrasound consistently measure the diaphragm? a study puts it to the test

NCT ID NCT07747532

Knowledge-focused Sponsor: University Health Network, Toronto 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 05, 2026 · Last updated Aug 06, 2026 · Updated 1 time

Summary

This study looks at whether diaphragm ultrasound gives consistent results when performed by different anesthesiologists. Two doctors will each scan the diaphragm using three different methods, and their measurements will be compared to see which method is most reliable. The goal is to find a dependable way to assess diaphragm function, especially on the left side, which is often harder to image. Participants are adults having elective surgery, and the study focuses on improving measurement accuracy rather than testing a treatment.

What this could mean

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

Active substance
Diaphragm ultrasound using three different measurement methods
What this could lead to
If reliable, this could help standardize diaphragm ultrasound, making it a more trustworthy tool for assessing diaphragm function in patients.
What could go wrong
The study is small and focuses on measurement consistency, not on patient outcomes. Results may not apply to all patient groups or ultrasound 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.

Participants

About 58 people

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

Expected to start

Aug 2026

An estimate. Start dates often move.

Expected to finish

Jul 2028

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

Patient aged 18 years or over who are scheduled for any elective surgical procedure at Toronto Western Hospital or Women's College Hospital, Toronto.

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: Participants must meet all the following inclusion criteria to be eligible for the study: 1. Any elective surgical patient 2. Age ≥18 years 3. American Society of Anesthesiologists class I to III Exclusion Criteria: Participants will not be eligible for the study if any of the exclusion criteria is present: 1. Pregnancy - patients will be asked if they are pregnant or not and screened post-consent from their medical chart. 2. History of diaphragmatic dysfunction 3. Previous surgical procedures on the lung, thorax or diaphragm. 4. Inability to understand the study activities and provide informed consent when explained about the study and the consent process 5. Refusal to participate in study

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Conditions

The condition(s) this trial relates to.

diaphragm disorder

As listed by the trial registrant

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

Diaphragm issues

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

  • Toronto Western Hospital, University Health Network

    Toronto, Ontario, M5T 2S8, Canada

More trials for these conditions

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