Green dye could help surgeons prevent stomach ulcers after bypass

NCT ID NCT06002906

Ongoing Symptom relief Sponsor: University Health Network, Toronto Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether a safe green dye, injected during gastric bypass surgery, can help surgeons see blood flow to the new stomach connection. Poor blood flow can lead to ulcers, leaks, or narrowing. The trial involves 300 adults and will follow them for two years to see if using the dye reduces these complications.

What this could mean

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

Active substance: indocyanine green (a green dye injected into the bloodstream to highlight blood flow during surgery)
What this could lead to: If it works, this dye could help surgeons spot poor blood flow during gastric bypass, potentially lowering the risk of ulcers, leaks, and other complications.
What could go wrong: This is a pilot study, so it's early and small. The dye's benefit is not proven yet, and it may not reduce complication rates in practice.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

gastric ulcer morbid obesity

As listed by the trial registrant

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

OBESITY, MORBID ULCER, GASTRIC

Contacts and locations

Locations

Toronto Western Hospital, University Health Network

Toronto, Ontario, M5T2S8, Canada

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