Clinical trial Recruiting at 1 site Observational Ages 18 to 80

Comparing the carbon footprint of endoscopic ultrasound versus MRCP for suspected common bile duct stones

Official title: Prospective Comparison of the Carbon Footprint of Endoscopic Ultrasound (EUS) vs Magnetic Resonance Cholangiopancreatography (MRCP) for Evaluation of Suspected Choledocholithiasis

Run by Asian Institute of Gastroenterology, India · NCT07283185 · Data updated 2026-11-12

This project will test whether endoscopic ultrasound (EUS) produces a smaller carbon footprint than MRCP when used to check for common bile duct (CBD) stones in adults with intermediate risk.

More Choledocholithiasis trials

Quick facts

Study typeObservational
Ages18 Years to 80 Years
SexAll
Enrollment200 (estimated)
SponsorAsian Institute of Gastroenterology, India
Academic / other
Locations1 site (Hyderabad, Telangana)
StatusRecruiting
StartedDecember 1, 2025
Main results expectedNovember 2026
Study endsNovember 2026
Registry record updatedJanuary 6, 2026
Trial IDNCT07283185 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (age ≥18) with an intermediate likelihood of CBD stone per ESGE guidelines who are undergoing either MRCP or EUS are the ideal candidates.

Probably not a fit

Patients categorized as high or low likelihood for CBD stone, those with contraindications to either modality, or those undergoing both tests simultaneously would not be expected to benefit from this comparison.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study will measure and compare greenhouse gas emissions (CO2e) associated with diagnostic MRCP and EUS performed for adults with intermediate likelihood of CBD stones at a single tertiary center. Participants are adults referred for either MRCP or EUS per standard clinical care, and the trial will capture energy use, equipment and facility contributions, and downstream procedure needs such as same-session ERCP. The design builds on prior randomized data showing similar diagnostic performance between the two tests and prior work suggesting lower emissions from EUS. Results will be reported as per-procedure carbon footprints to inform more sustainable diagnostic choices.

Why it matters

Potential benefit: If successful, the findings could help clinicians choose a lower-carbon diagnostic option and reduce the environmental impact of care without compromising diagnosis.

How similar studies have gone: A landmark randomized trial has shown MRCP and EUS are diagnostically equivalent for intermediate-risk patients, and prior research has shown diagnostic EUS often produces substantially less CO2e per procedure than radiologic imaging.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age ≥18 years
* Intermediate likelihood of CBD stone (per ESGE)
* Undergoing either MRCP or EUS for evaluation

Exclusion Criteria:

* High or low likelihood category (per ESGE)
* Undergoing both MRCP and EUS simultaneously
* Contraindications to either modality

Where it's running

  • AIG Hospitals
    Hyderabad, Telangana, India
    Recruiting

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.