Breath test could reveal hidden blood flow in lungs
NCT ID NCT01402752
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether a simple breathing test can reliably measure blood flow in the lining of the windpipe and large airways. Healthy adults breathe a harmless gas called dimethyl ether, and the amount they breathe out reveals how much blood is flowing through the airway tissues. The goal is to see if the measurement gives the same result when repeated five minutes apart. If the method proves reproducible, it could offer a non-invasive way to monitor airway health in conditions like asthma or chronic bronchitis.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
dimethyl ether tracer gas
What this could lead to
If validated, this non-invasive technique could help doctors monitor airway blood flow in lung diseases without needing a bronchoscope.
What could go wrong
This is a small, early-stage validation study in healthy people only. The method may not work reliably in patients with lung disease or be practical in routine care.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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The condition terms exactly as the trial's registrant entered them.