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Breath test meets x-ray: a new way to pinpoint gut troubles?

NCT ID NCT07145580

Diagnosis Sponsor: Klinik Arlesheim Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 20, 2026 · Last updated Aug 21, 2026 · Updated 1 time

Summary

This study looks at whether combining a lactulose breath test with an abdominal X-ray can more accurately diagnose two common gut conditions: small intestinal bacterial overgrowth (SIBO) and carbohydrate intolerance. The test works by tracking hydrogen in the breath and using an X-ray to see where food has traveled in the gut. If hydrogen rises before the contrast agent reaches the large intestine, it suggests SIBO; if it rises after, it points to carbohydrate intolerance. The researchers will review data from 510 patients who had this combined test to see if it is practical and safe.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Combined lactulose H2-breath test with abdominal X-ray imaging
What this could lead to
If successful, this could provide a simple, affordable way to accurately distinguish between SIBO and carbohydrate intolerance, leading to better treatment choices.
What could go wrong
This is a retrospective study, so it can't prove cause and effect. The test's accuracy may be limited by variability in transit time measurements, and the added X-ray may not be practical in all settings.

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

510 people

The number who actually took part.

Started

Aug 2025

Finished

Jul 2026

Lead sponsor

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

Patients referred for breath testing to assess the causes of digestive symptoms or maldigestion 2020-2024

Ages

18 years and older

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patients referred for breath testing to assess the causes of digestive symptoms or maldigestion 2020-2024 * Patients signed general consent to allow use of clinical data obtained during clinical assessment and breath testing to be used in research project. Exclusion Criteria: \-

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Conditions

The condition(s) this trial relates to.

irritable bowel syndrome small intestinal bacterial overgrowth

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Breath tests Food intolerance syndromes Small intestinal bacterial overgrowth syndrome (SIBO)

Contacts and locations

Locations

  • Klinik Arlesheim

    Arlesheim, Basel-Landschaft, 4144, Switzerland

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