- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01083498
Fractional Laser as Treatment Option for Various Pigment Disorders (fractional-2)
Ablative Fractional Laser Therapy as Treatment for Becker's Nevus; a Pilot Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Actual)
Phase
- Phase 2
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Becker nevus
- Subjects attending the outpatient department of the Netherlands Institute for Pigment Disorders
- Age at least 18 years
- Subject is willing and able to give written informed consent
Exclusion Criteria:
- use of bleaching creams during the past six weeks
- history of keloid
- active eczema
- suspected hypersensitivity to lidocaine or triple therapy
- use of isotretinoin in the past six months
- high exposure of the lesion to sunlight or UV light (UVA or UVB).
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Ablative fractional laser
In each patient, a square test region of 5-10 cm2 was treated with ablative fractional laser in three sessions in combination with intermittent topical bleaching with triple topical therapy (hydroquinone 5%, tretinoin 0.05%, triamcinolone acetonide 0.1% cream) to prevent laser-induced postinflammatory hyperpigmentation. Note: this study had a split-lesion design. In each patient, two test regions were randomized to receive either ablative fractional laser therapy or no treatment. |
10,600 nm ablative fractional laser Irradiance: 10 mJ/microbeam.
Coverage: 35-45%.
Number of treatment sessions: 3
Other Names:
|
No Intervention: Control
In each patient, a square test region of 5-10 cm2 was treated with topical bleaching with triple topical therapy (hydroquinone 5%, tretinoin 0.05%, triamcinolone acetonide 0.1% cream)alone (to allow comparison of the regions). Note: this study had a split-lesion design. In each patient, two test regions were randomized to receive either ablative fractional laser therapy or no treatment. |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Physician's global assessment
Time Frame: T0, 3 and 6 months follow-up
|
Improvement of hyperpigmentation was assessed by an independent blinded dermatologist.
The results were scored on a scale from zero to six (0: total clearance (100% improvement), 1: almost total clearance (90-99% improvement), 2: distinct clearance (75-89% improvement) 3: moderate clearance (50-74% improvement) 4: mild clearance (25-49% improvement) 5: no change, 6: worsening of hyperpigmentation).
|
T0, 3 and 6 months follow-up
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
L-value
Time Frame: T0, 3 and six months follow-up
|
Improvement of hyperpigmentation was assessed by color measurement through reflectance spectroscopy (Microflash 200 d, Datacolor International, Lawrenceville, GA).
This instrument, with an aperture of 4 mm, determines color by measuring the intensity of reflected light of particular wavelengths.
In this study, the obtained L value, reflecting the lightness of the measured area of skin, was used.
|
T0, 3 and six months follow-up
|
Melanin index
Time Frame: T0, 3 and 6 months follow-up
|
Melanin index was measured using a spectrometer (Derma-Spectrometer, Cortex Technology ApS, Hadsund, Denmark) in order to assess changes in the amount of dermal and epidermal melanin.
|
T0, 3 and 6 months follow-up
|
Patient's global assessment
Time Frame: 3 and 6 months follow-up
|
Patients were asked to score the improvement of hyperpigmentation on a visual analogue scale (VAS) from 0 to 10 (Patient's Global Assessment, PGA) at all follow-up moments.
|
3 and 6 months follow-up
|
Patient's satisfaction
Time Frame: 3 and 6 months follow-up
|
Patient's satisfaction was scored on a visual analogue scale (VAS) from 0 to 10.
|
3 and 6 months follow-up
|
Histopathologic assessment
Time Frame: 3 months follow-up
|
In order to evaluate for microscopic and ultrastructural treatment induced changes, 2 mm punch biopsies were taken from all patients at three months follow-up.
Biopsies were taken from the optical centre of both treated and control site.
All biopsy specimens were split for processing for light microscopy.
.... was assessed by an independent blinded pathologist.
|
3 months follow-up
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- fractional-2
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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