The purpose of this study is to determine the efficacy and safety of a blue light device for treating Psoriasis vulgaris. The study will compare a blue light treated plaque with an untreated control plaque. Additionally, two intensities of blue light are compared.
Blue light has been shown to release bioactive nitric oxide (NO) from nitrite and nitrosated proteins found in high concentrations in the skin. This bioactive NO has many physiological functions regulating immune responses, proliferation / differentiation as well as local blood Perfusion of the skin. The study will test the PSO-CT02 device, an new investigational medical device emitting blue light with a peak wavelength of 453nm on treating localised mild Psoriasis vulgaris. It can be worn on the Skin above the effected skin area. In this study Treatment (target) and control area as well as intensity of blue light are randomized. The control area will serve as reference. 50 Patients will treat the target area daily (at least 5 times/week) at home for an initial treatment period of 4 weeks. During those 4 weeks, patients will return to the study site for safety and effectiveness assessments twice. After this initiation period patients will treat their plaque for further 8 weeks (3 times/week). This is followed by a 4 week follow up phase without treatment.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
47
The PSO-CT02 device is a non CE marked investigational medical device that is worn on the affected skin area where it irradiates the Psoriasis plaque for 30 minutes with blue light.
Department of Dermatology and Allergology, Medical faculty of the RWTH Aachen
Aachen, Germany
Change From Baseline (Visit 2) of the Local Psoriasis Area Severity Index (PASI) of the Target Area (High Intensity (HI) Group) as Compared to the Control Area at End of Treatment (Visit 7, Week 12).
In this study only the "local" PASI (also called local psoriasis severity index - LPSI) was evaluated. The investigator evaluated and graded the severity of erythema, induration, and scaliness as the key symptoms of psoriasis on the study areas using the following scale: 0 = no sign, 1 = slight, 2 = moderate, 3 = marked,4 = very marked A total severity score was calculated as the sum of the three symptom ratings (range 0-12 whereas 0 (best) - 12 (worst)).
Time frame: baseline and week 12
Change From Baseline of the Local Psoriasis Area Severity Index (PASI) of the Target Area (High Intensity) as Compared to the Control Area at End of Treatment During the Attack Period (Week 4, Visit 5)
In this study only the "local" PASI (also called local psoriasis severity index - LPSI) was evaluated. The investigator evaluated and graded the severity of erythema, induration, and scaliness as the key symptoms of psoriasis on the study areas using the following scale: 0 = no sign, 1 = slight, 2 = moderate, 3 = marked,4 = very marked A total severity score was calculated as the sum of the three symptom ratings (range 0-12 whereas 0 (best) - 12 (worst)).
Time frame: baseline and week 4
Change From Week 12 of the Local Psoriasis Area Severity Index (PASI) of the Target Area (High Intensity) as Compared to the Control Area at End of Follow-up
In this study only the "local" PASI (also called local psoriasis severity index - LPSI) was evaluated. The investigator evaluated and graded the severity of erythema, induration, and scaliness as the key symptoms of psoriasis on the study areas using the following scale: 0 = no sign, 1 = slight, 2 = moderate, 3 = marked,4 = very marked A total severity score was calculated as the sum of the three symptom ratings (range 0-12 whereas 0 (best) - 12 (worst)).
Time frame: Week 12 and week 16
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Change From Baseline (Visit 2) of the Local Psoriasis Area Severity Index (PASI) of the Target Area (Low Intensity (LI) Group) as Compared to the Control Area by Week.
In this study only the "local" PASI (also called local psoriasis severity index - LPSI) was evaluated. The investigator evaluated and graded the severity of erythema, induration, and scaliness as the key symptoms of psoriasis on the study areas using the following scale: 0 = no sign, 1 = slight, 2 = moderate, 3 = marked,4 = very marked A total severity score was calculated as the sum of the three symptom ratings (range 0-12 whereas 0 (best) - 12 (worst)).
Time frame: baseline and week 4, 12, 16
Difference in Change From Baseline of Local Psoriasis Area Severity Index (PASI) Between Target and Control Area of the High Intensity (HI) Group as Compared to the Low Intensity (LI) Group
In this study only the "local" PASI (also called local psoriasis severity index - LPSI) was evaluated. The investigator evaluated and graded the severity of erythema, induration, and scaliness as the key symptoms of psoriasis on the study areas using the following scale: 0\. = no sign 1. = slight 2. = moderate 3. = marked 4. = very marked A total severity score was calculated as the sum of the three symptom ratings (range 0-12).
Time frame: baseline and week 4, 8, 16
Change From Baseline of Erythema Evaluated by Mexameter of the Target Area of High Intensity (HI) and Low Intensity (LI) as Compared to the Control Area
Erythema was measured directly after treatment. Mexameter readings ranged from 0 to 100. Higher values describe higher erythema levels.
Time frame: baseline and week 4, 12
Change From Week 12 (End of Treatment) of Erythema Evaluated by Mexameter of the Target Area of High Intensity (HI) and Low Intensity (LI) as Compared to the Control Area at End of Follow-up
Erythema was measured directly after treatment. Mexameter readings ranged from 0 to 100. Higher values describe higher erythema levels.
Time frame: week 12 and week 16
System Usability Scale
At the end of treatment (visit 7), the usability of the investigational device was evaluated by a questionnaire presented to the patient in German. The usability was evaluated by using the System Usability Scale (SUS) which is an effective tool for assessing the usability of a device. It provides an easy-to-understand score from 0 (negative) to 100 (positive).
Time frame: week 12
Change From Baseline in Dermatology Life Quality Index (DLQI)
It is a simple 10-question validated questionnaire. The DLQI is calculated by summing the score of each question resulting in a maximum of 30 and a minimum of 0. The higher the score, the more quality of life is impaired. As the change from baseline is calculated negative values in the Outcome Measure Data indicate an improvement in quality of life.
Time frame: baseline and week 12
Time to First Use of Topical Co-treatment With Vitamin D of High Intensity (HI) and Low Intensity (LI)
Time frame: patients will be followed for the complete duration of the clinical study for 16 weeks
Total Duration of Topical Co-treatment With Vitamin D of High Intensity (HI) and Low Intensity (LI)
Time frame: week 16
Adverse Device Events (Serious and Non-serious)
Adverse device events: Adverse event related to the use of an investigational medical device wich led to any untoward medical occurrence, unintended disease or injury, or untoward clinical signs (including abnormal laboratory findings) in subjects, users or other persons. Serious adverse device event: Adverse device effect that has resulted in a) led to death, b) led to serious deterioration in the health of the subject, that either resulted in 1) a life-threatening illness or injury, or 2) a permanent impairment of a body structure or a body function, or 3) in-patient or prolonged hospitalization, or 4) medical or surgical intervention to prevent life-threatening illness or injury or permanent impairment to a body structure or a body function, c) led to foetal distress, foetal death or a congenital abnormality or birth defect.
Time frame: week 0, 1, 2, 4, 8, 12, 16