Lying down changes your lungs: new study compares obese and Non-Obese volunteers
NCT ID NCT07341113
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This completed study looked at how different lying positions affect air and blood flow in the lungs of 40 healthy volunteers—half with obesity and half without. Using a non-invasive imaging tool called electrical impedance tomography (EIT), researchers measured how well ventilation and perfusion matched up in each position. The goal was to better understand how body shape and position influence lung function, which could help personalize breathing support for patients with obesity.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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40 people
The number who actually took part.
- Started
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Dec 2025
- Finished
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Mar 2026
- 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 non-obese and obese volunteers
- Ages
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18 to 65 years
- 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: -BMI between 18-25 kg/m² or 30-40 kg/m² Exclusion Criteria: * Individuals with a body mass index (BMI) between 25 and 30 kg/m², * Pregnancy * Respiratory tract infection within the previous two weeks * Anatomical abnormalities of the chest wall that may interfere with Electrical Impedance Tomography (EIT) measurements.
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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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Koç University Hospital
Istanbul, 34010, Turkey (Türkiye)
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Other studies related to the condition(s) this trial covers.
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