Could water replace gas in colonoscopies for better polyp detection?
NCT ID NCT06333392
First seen Jun 27, 2026 · Last updated Sep 04, 2026 · Updated 1 time
Summary
This study compares a new technique called total underwater colonoscopy (using water instead of gas) to the standard method in over 1,000 people undergoing screening after a positive stool test. The goal is to see if water helps doctors find more flat, hard-to-spot polyps that can lead to cancer, while also reducing pain and the need for repeat procedures. If successful, this simple change could make screening more effective and comfortable, especially for women.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 1,070 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Oct 2024
- Expected to finish
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Jun 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.
- Ages
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55 to 60 years
- 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.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * All individuals referred to colonoscopy after a positive FIT screening at the participating screening centres Exclusion Criteria: * Individuals with a CRC diagnosis within the last 10 years.
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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.
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
5 sites in 2 countries. 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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Akershus University Hospital Health Trust
RECRUITINGLørenskog, 1478, Norway
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Sahlgrenska University Hospital, Gothenburg, Region Västra Götaland, Sweden, Department of Medicine, Geriatrics and Emergency Care Mölndal
RECRUITINGGothenburg, Sweden
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Ullevål University Hospital Health Trust
RECRUITINGOslo, 0424, Norway
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Vestre Viken Health Trust, Bærum Hospital
RECRUITINGDrammen, 3004, Norway
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Østfold Hospital Health Trust
RECRUITINGGrålum, 1714, Norway
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a lab test tell which chemo works for colon cancer?
- Warm water may make colonoscopy less painful for older adults
- Can MRI and computer models predict how well cancer drugs reach tumors?
- Gut bacteria may hold clues to why some cancer treatments work better
- Burning the edges: a new way to stop colon polyps from coming back
- Missed Follow-Up colonoscopies: do they raise the risk of advanced growths?