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Texts and gadgets aim to keep kidney stones away

NCT ID NCT05196113

Prevention Sponsor: University of Michigan 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tested whether digital tools like a smart water bottle, a fitness watch, and text reminders could help people with a history of kidney stones drink more water as their doctor recommended. 216 adults who had a kidney stone in the past 5 years and drank less than 2 liters of urine per day took part. The goal was to see if these tools could increase their urine output and reduce the risk of forming new stones.

What this could mean

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

Active substance
behavioural intervention (digital tools and text reminders to increase fluid intake)
What this could lead to
If successful, this approach could offer a simple, low-cost way to help prevent kidney stones from coming back.
What could go wrong
This is a small, completed feasibility study. The tools may not work for everyone, and long-term adherence outside a study setting is uncertain.

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.

Phase

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

216 people

The number who actually took part.

Started

Jan 2022

Finished

Apr 2025

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.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * previous diagnosis of symptomatic kidney stone in past 5 yrs * 24-hr urine volume ≤ 2.0 L/day, * age 18 or older, * own iOS or Android smartphone, * proficient in English language, * capable of providing informed consent, and * willing to use a Fitbit smartwatch, connected water bottle, and mobile app for the study every day for a year, and receive text messages reminder to drink. Exclusion Criteria: * previous diagnosis with cystine stone, * pregnant or planning to become pregnant in the next 12 months, * concurrently participating in another study involving fluid intake or diet, * plan to have surgery or relocate outside the area within the next year * co-morbidities that preclude high fluid intake, conditions with high fluid losses (e.g., congestive heart failure, bariatric surgery, GI tract ostomy, short gut syndrome, chronic diarrhea including patients with ulcerative colitis/Crohn's disease, hyponatremia), or conditions that preclude ability to collect 24-hour urine (severe urinary incontinence), * active medical treatments that would impair protocol compliance, * chronic use of lithium, or * psychiatric conditions impairing compliance with the study protocol.

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Conditions

The condition(s) this trial relates to.

urolithiasis

As listed by the trial registrant

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

Urolithiasis

Contacts and locations

Locations

  • Penn State Hershey Medical Center

    Hershey, Pennsylvania, 17033, United States

  • University of Michigan

    Ann Arbor, Michigan, 48109, United States

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