Observational Analytical Validation Study of the Replior ScratchSense

November 1, 2026 updated by: Replior AB

Observational Analytical Validation Study of the Replior ScratchSense for Nocturnal Scratching Assessment

Nocturnal scratching is a frequent and meaningful symptom in dermatological conditions such as atopic dermatitis. It may reflect underlying disease activity and can substantially disrupt overall sleep and quality of life. Existing approaches to characterizing Nocturnal Scratching-such as self-reports, sleep diaries, and video monitoring-are often subjective, labor-intensive, or lack scalability for widespread use.

Emerging wearable technologies offer an alternative, by enabling objective, continuous, and non- invasive signal related to scratch behavior during sleep.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The primary objective of this analytical validation study is to evaluate the characteristics of the Replior ScratchSense designed to detect and quantify Nocturnal Scratch behavior in users. This includes validating the accuracy, precision, specificity, and overall reliability of the ring's scratch detection algorithm in a controlled environment.

Sleep tracking as secondary objective. Replior ScratchSense ring (scratch and sleep research tracking)

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
35

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • France
      • Grenoble, France
        • Recruiting
        • Eurofins Optimed 1 rue des Essarts, 38610 Gières - France

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Willing and able to wear two finger-worn sensors, one on each hand (on the index or middle finger), during sleep for three nights. Willing to undergo a video recording using thermal camera overnight in a controlled environment during sleep for three nights. Willing to wear the PSG system during sleep as part of the protocol during sleep for three nights.

Able and willing to follow all study instructions, including completing questionnaires and attending study visits. Written informed consent signed prior to selection, included specific thermal video recording consent.

Description

Inclusion Criteria:

  • Male / female participant, aged 18 to 65 years inclusive. Negative pregnancy test at screening for childbearing potential women. Presence of itch-related and/or scratching-inducing conditions: documented or self-reported history of nocturnal itching and scratching, due to conditions such as:

    • Atopic dermatitis
    • Chronic pruritus of unknown origin
    • Other pruritic dermatological or systemic conditions. Expected Nocturnal Scratch activity: participants must: Have experienced Nocturnal Scratching in the past 7 days, and
    • Be considered likely to scratch during the study period, based on medical history, clinician judgment, or recent self-report

Exclusion Criteria:

  • No current or expected nocturnal itch: well-controlled conditions or no recent reports of nighttime scratching.
  • Confounding movement disorders or sleep conditions: diagnosed restless legs syndrome, periodic limb movement disorder, moderate/severe obstructive sleep apnea, Parkinson's disease, or other conditions that may interfere with motion analysis.
  • Recent changes in anti-pruritic treatment: Initiation or dose changes of systemic medications that may suppress nocturnal itch within the past 2 weeks, including: i. Oral corticosteroids ii. Immunosuppressive agents (e.g., cyclosporine, methotrexate) iii. Biologics (e.g., dupilumab) unless on a stable dose ≥8 weeks iv. Sedating antihistamines unless stable for ≥1 week.
  • Topical treatment use: initiation of topical corticosteroids, calcineurin inhibitors, or emollients within 3 days prior to study start, and no use during the study.
  • Severe psychiatric or cognitive impairment that could impair the ability to consent or comply with the protocol

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: OTHER
  • Time Perspectives: PROSPECTIVE

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Sensor wearing

Concerning Nocturnal Scratch, each participant will be equipped with two Replior ScratchSense rings, worn on the index or middle finger of each hand
Device: Scratch and sleep research tracking

Replior ScratchSense finger worn sensor in detecting and characterizing nocturnal scratching through motion and contact vibration signals and collecting signals associated with sleep related movement patterns and scratch-related intensity and pressure.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Number of Scratch bout
Time Frame: From enrollment to Night 3 (Visit3)

Scratch Bout: a group of one or more Scratch Events occurring in close temporal proximity.
From enrollment to Night 3 (Visit3)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Total Sleep Time (TST)
Time Frame: From enrollment to Night 3

Minutes of sleep across the night; the total minutes actually spent asleep during the night.
From enrollment to Night 3

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Replior AB

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Christer Nilsson, Replior AB

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 12, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 10, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 11, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 26, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 26, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 2, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 4, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 1, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • OP115126.REP

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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