Scientists measure healthy diaphragms to set new standard
NCT ID NCT03129386
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study used ultrasound to measure how much the diaphragm thickens during a sniff in 60 healthy adults. The goal was to define a normal range for this measurement, which could help doctors spot diaphragm problems in the future. Participants were grouped by age and gender to see if these factors affect the results.
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 provide doctors with a normal range to better diagnose diaphragm problems in patients.
- What could go wrong
- This is a small, observational study in healthy people only. It does not test any treatment, so results may not apply to patients with disease.
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
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60 people
The number who actually took part.
- Started
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Jun 2016
- Finished
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Jan 2019
- Lead sponsor
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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
Healthy adult subjects with no antecedent history of neuromuscular or cardiorespiratory disease.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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: * Over 18 years of age Exclusion Criteria: * Antecedent history of neuromuscular or cardiorespiratory disease
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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University Health Network
Toronto, Ontario, M5G 2N2, Canada
More trials for these conditions
Other studies related to the condition(s) this trial covers.