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Can a sticky patch replace lab tests for sweat? small study puts hDrop sensor to the test

NCT ID NCT07490756

Knowledge-focused Sponsor: University of Arkansas, Fayetteville 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested how well the hDrop wearable sensor measures sweat rate and sodium loss compared to standard lab methods. Twenty healthy adults wore the sensor while exercising in a hot room for 60 minutes. Researchers also collected sweat using patches and electrical stimulation to check the device's accuracy and reliability across two separate visits.

What this could mean

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

Active substance
hDrop hydration sensor
What this could lead to
If the hDrop sensor proves accurate, it could offer a simple way for athletes and workers to monitor hydration and electrolyte loss in real time.
What could go wrong
This is a small, early-stage study with only 20 healthy participants, so results may not apply to everyone. The device is not FDA-approved and is meant for education, not medical diagnosis.

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

20 people

The number who actually took part.

Started

Mar 2025

Finished

Feb 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.

Ages

18 to 39 years

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: * Healthy exercisers * No orthopedic injury * No chronic conditions * Able to exercise for 60min in the heat Exclusion Criteria: * Chronic conditions * Not 18y or over 39y * Taking medications that alter fluid balance or thermoregulation * Current orthopedic injury

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As listed by the trial registrant

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

Sweat sodium concentration

Contacts and locations

Locations

  • University of Arkansas Exercise Science Research Center

    Fayetteville, Arkansas, 72701, United States

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