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New device measures Skin's natural chemical to personalize light therapy

NCT ID NCT04223570

Knowledge-focused Sponsor: Dartmouth-Hitchcock Medical Center 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested a new handheld device that measures a natural chemical called protoporphyrin IX in the skin. This chemical is important for photodynamic therapy, a light-based treatment for certain skin conditions. Researchers measured the chemical levels in 219 adults at different body spots and looked at how factors like age, skin type, and temperature affect those levels. The goal was to learn how to customize light therapy for each person.

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.

Participants

219 people

The number who actually took part.

Started

Dec 2022

Finished

May 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.

Who is studied

Patient subjects will be recruited at the DHMC outpatient dermatology clinic. Patients presenting for their routine sessions or regularly scheduled follow-up dermatology appointments will be provided information about the study. Employees at this location will also have the opportunity to participate.

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: * All patients and staff appearing at the Dartmouth-Hitchcock Medical Center Heater Road Dermatology Clinic who are aged 18 years and older Exclusion Criteria: * Pregnant women * Women who are breast-feeding * Adults unable to consent * Individuals who are not yet adults * Prisoners.

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Conditions

The condition(s) this trial relates to.

actinic keratosis

As listed by the trial registrant

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

Photodynamic therapy Protoporphyrin ix

Contacts and locations

Locations

  • Dartmouth-Hitchcock Medical Center Heater Road Clinic

    Lebanon, New Hampshire, 03766, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.