Evaluation of the Tolerance and Performance of Cyto-selective Difluoroethane-based Cryotherapy in the Treatment of Brown Spots (Solar and Senile Lentigines, Post-Inflammatory Hyperpigmentation)
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 80
- 试验地点
- 2
- 主要终点
- Change from baseline skin hyperpigmentation
研究概览
简要总结
CS5_7 study aim to evaluate the tolerance and to adjust the mode of administration of two conditions of cryotherapy treatment applied on the brown spots of the face and hands with 1 prototype (816-v1). A brown spot is defined as solar or senile lentigo and post-inflammatory hyperpigmentation (PIH).
The study will evaluate the following prototype :
• Prototypes from (816-v1 201) to (816-v1 290)
详细描述
Rational :
Hyperpigmentation is a problem in all skin types. Safe depigmentation is a challenge. Cryotherapy with liquid nitrogen at -70 °C has been used in the treatment of solar skin lesions for many years but causes considerable damage.
Solar/senile lentigo is a harmless patch of darkened skin. It results from exposure to ultraviolet (UV) radiation, which causes local proliferation of melanocytes and accumulation of melanin within the skin cells (keratinocytes). Solar/senile lentigos or lentigines are very common, especially in people over the age of 40 years.
A solar/senile lentigo is a flat, well-circumscribed patch. It can be round, oval or irregular in shape. Colour varies from skin-coloured, tan to dark brown or black, and size varies from a few millimetres to several centimetres in diameter. They can be slightly scaly. Solar/senile lentigines are found as groups of similar lesions on sun-exposed sites, particularly the face or the back of hands.
Cryotherapy is more and more used to improve skin appearance and currently used to treat lentigo spot. However, the cryogenic gas (conventional cryotherapy - liquid nitrogen) creates a dermabrasion of the skin surface and person receiving this kind of treatment presents an impaired skin during a few days following the treatment as temporary damage of stratum corneum, erythema, scars, burns
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Sequential
- 主要目的
- Treatment
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 18 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Female or male.
- •Ages 18 to
- •Phototypes V and VI (according with Fitzpatrick scale), according to the spots' distribution table.
- •Featuring brown spots ≥ 3 and ≤ 6 mm in diameter (on the face (and when possible, on the hands).
- •Agreeing not to be exposed to the sun (or artificial UV) during the study.
- •Informed, having undergone a general clinical examination attesting to his/her ability to participate in the study.
- •Having given written consent for their participation in the study.
- •No suspicion of carcinoma after investigation by a dermatologist.
排除标准
- •Having performed cosmetic treatments (exfoliants, scrubs or self-tanners, manicures (only nails care acceptable), facials, UV ...) in the month before the start of the study, at the level of the face and/or hands.
- •Having applied a depilatoring product in the month prior to the start of the study, on the face and/or hands.
- •Having performed cosmetic treatments in a dermatologist (laser, Intense Pulsed Light (IPL), peeling, creams, cryotherapy ...), on the face and/or hands in the last 6 months.
- •With dermatosis, autoimmune disease, systemic, chronic or acute disease, or any other pathology that may interfere with treatment or influence the results of the study (people with diabetes or circulatory problems, allergic to cold, Raynaud's syndrome...).
- •Receiving treatment by general or local (dermo corticoids, corticosteroids, diuretics ...) likely to interfere with the evaluation of the parameter studied.
- •Participating in another study or being on a period of exclusion from a previous study.
- •Unable to follow the requirements of the protocol.
- •Vulnerable: whose ability or freedom to give or refuse consent is limited.
- •Major protected by law (tutorship, curatorship, safeguarding justice...).
- •People unable to read and write english language.
- •Unable to be contacted urgently over the phone.
- •For female subjects:
- •Pregnant woman (or wishing to be pregnant during study) or while breastfeeding.
- •A woman who does not have a contraceptive method.
结局指标
主要结局
Change from baseline skin hyperpigmentation
时间窗: Day 0, Day 7, Day 14, Day 21, Day 28, Day 35, Day 42, Day 49, Day 56, Day 63, Day 70, Day 77, Day 84 and Day 0 + 6 months
The evaluation will be performed visually on the selected spots. A scale in 6 points (0 to 5) will be used : 0=Clear of hyperpigmentation; 1. Almost clear of hyperpigmentation; 2. mild, but noticeable hyperpigmentation; 3. moderate hyperpigmentation (medium brown in quality); 4. severe hyperpigmentation (dark brown in quality); 5. very severe hyperpigmentation (very dark brown, almost black in quality).
Self-assesment of pain by VAS
时间窗: Day 0
The pain of the treatment will be assessed by the Visual Analogue Scale (VAS) at time T0 on the treated area. The pain assessed is that felt during the application of the devices. It will be collected from the patient within 5 minutes of application. The VAS is made up of a 10-centimeter line anchored by two ends of the pain. 10 is the first end being the "maximum pain imaginable" and 0 is the other end being "no pain".
Change from baseline skin appearance
时间窗: Day 0, Day 7, Day 14, Day 21, Day 28, Day 35, Day 42, Day 49, Day 56, Day 63, Day 70, Day 77, Day 84 and Day 0 + 6 months
The evaluation will be performed visually on the selected spots and surrounded spotless skin area around the spot skin to assess erythema, oedema blister, bubble, scars, micro-bruise, hematoma, dryness,desquamation, fissures/cracks, roughness,crust, pink spots and papules. A scale in 5 points (0 to 4) will be used : 0=none; 1. very mild; 2. mild; 3. moderate; 4. severe.
Incidence of unexpected events
时间窗: Day 0, Day 7, Day 14, Day 21, Day 28, Day 35, Day 42, Day 49, Day 56, Day 63, Day 70, Day 77, Day 84 and Day 0 + 6 months
Unexpected events
Change from baseline skin sensation
时间窗: Day 0, Day 7, Day 14, Day 21, Day 28, Day 35, Day 42, Day 49, Day 56, Day 63, Day 70, Day 77, Day 84 and Day 0 + 6 months
The evaluation will be performed visually on the selected spots and around the spot skin to assess tightness, stinging, itching, warm and burning sensation. A scale in 5 points (0 to 4) will be used : 0=none; 1. very mild; 2. mild; 3. moderate; 4. severe.
Change from baseline skin hypopigmentation
时间窗: Day 0, Day 7, Day 14, Day 21, Day 28, Day 35, Day 42, Day 49, Day 56, Day 63, Day 70, Day 77, Day 84 and Day 0 + 6 months
The evaluation will be performed visually on the selected spots. A scale in 5 points will be used (0 to 4): 0=no hypopigmented lesion; 1. very slight area of hypopigmentation of very small size and very slightly fairer than the surrounding skin; 2. slight area of hypopigmentation of small size and slightly fairer than the surrounding skin; 3. moderate : area of hypopigmentation of moderate size and much fairer than the surrounding skin; 4. severe : area of hypopigmentation of large size and much fairer than the surrounding skin.
Change from baseline spots visibility
时间窗: Day 0, Day 7, Day 14, Day 21, Day 28, Day 35, Day 42, Day 49, Day 56, Day 63, Day 70, Day 77, Day 84 and Day 0 + 6 months
Standardized photographs will be taken using a Dermatoscope C-Cube® (PIXIENCE) which allows realizing high resolution skin pictures. The capture will be taken on the previously selected lentigo and a spotless area.
次要结局
- Self assessment of skin appearance(Day 0, Day 7, Day 14, Day 21, Day 28, Day 35, Day 42, Day 49, Day 56, Day 70, Day 84 and Day 0 + 6 months)