RecruitingNot Applicable

GREENWATER 2.0: Reducing Iodinated Contrast Agents in Hospital Wastewater

Italy416 participantsStarted 2026-03-10

Plain-language summary

The goal of this observational study is to learn if using a dedicated urine collection device after CT scans can help reduce the amount of iodinated contrast agent released into hospital wastewater in adult outpatients undergoing contrast-enhanced CT scans. The main questions it aims to answer are: * Does the dedicated urine collection device improve patient acceptance and compliance with post-contrast urine collection? * How much iodinated contrast agent can be recovered from urine collected after CT scans? Participants will: * Have their planned CT scan with iodinated contrast agent as part of their regular medical care. * Wait in the radiology department for about 60 minutes after the contrast injection. * Use a dedicated urine collection device before leaving the hospital. * Answer short questions about their experience with the device. This does not change the CT scan, the contrast agent used, or the standard clinical imaging procedure. The only additional procedure is the use of the dedicated urine collection device after the scan.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Adult patients aged 18 years or older. * Patients scheduled for a clinically indicated contrast-enhanced CT scan with iodinated contrast agent. * Patients able to provide written informed consent. * Patients willing to wait approximately 60 minutes after contrast injection before using the dedicated urine collection device. Exclusion Criteria: \- Patients unable to use the dedicated urine collection device for urine collection.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Patient Acceptance and Compliance With Post-Contrast Urine Collection

Timeframe: At the time of the CT examination, up to 60 minutes after contrast injection

Trial details

NCT IDNCT07620093

SponsorI.R.C.C.S Ospedale Galeazzi-Sant'Ambrogio

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2026-09

Contact for this trial

Luca Maria Sconfienza, MD, PhD

+390283502227 io@lucasconfienza.it

View on ClinicalTrials.gov More Environmental Sustainability in Radiology trials