Trash to treasure: used filters may hold breath biomarkers
NCT ID NCT07607977
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at whether the filters used in ventilators during surgery can capture tiny proteins and particles from a patient's breath. Researchers will analyze these filters to see if they can detect signs of respiratory inflammation. Ten adults having planned surgery will take part, and no extra procedures are needed beyond standard care.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 10 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2026
- Expected to finish
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May 2027
An estimate. End dates often move.
- 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
The investigators will include adult patients who are scheduled for elective surgery for non-malignant conditions under general anesthesia with invasive mechanical ventilation. The written and oral study information will be provided at the standard preoperative consultation with the anesthesiologist the day before elective surgery.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 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: * ≥18 years, able to understand study information in Danish. * Admitted for elective surgery for non-malignant conditions with either intravenous or inhalation anaesthesia and invasive mechanical ventilation according to standard practice. * Expected invasive mechanical ventilation \> 1 hour. * Possess legal capacity. * Informed, signed consent is obtained. Exclusion Criteria: * Patients who are transferred to the ICU for continuous invasive mechanical ventilation after end of elective surgery. * Known chronic lung disease.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Aalborg University Hospital
RECRUITINGGistrup, 9260, Denmark
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