The Comparison of Picosecond 532 and 1,064 Nanometers Laser and Q-switched Nd:YAG 532 and 1,064 Nanometers Laser in the Treatment of Benign Pigmented Lesions: A Randomized Controlled Trial
试验速览
- 阶段
- 4 期
- 入组人数
- 20
- 试验地点
- 1
- 主要终点
- Doctor evaluation of improvement using quartile scale
研究概览
简要总结
The objective of this study is to evaluate the efficacy and safety of picosecond 532 and 1,064 nanometers laser in the treatment of benign pigmented lesions compared with q-switched 532 and 1,064 nanometers laser.
详细描述
Benign pigmented lesions can be divided into epidermal lesions such as freckles, lentigines, solar lentigines or cafe au lait macules and dermal lesions such as Nevus of Ota or Hori's nevus.
Q-switched 532 and 1064 nm lasers were reported to be safe and effective in the treatment of these benign pigmented lesions. By using selective photothermolysis theory, both q-switched 532 and 1064 nm lasers target on melanin causes photomechanical destruction of the melanin. However, the occurrence of post inflammatory hyperpigmentation (PIH) were reported especially in patients with darker skin type.
Recently, picosecond 532, 755, 1064 nm laser was reported to treat benign pigmented lesions effectively. With their ultra short pulse duration (picosecond domain), it is ideally believed to be pure photomechanical effects without thermal injury to surrounding tissue. As a result, the incident of PIH should be reduced.
The investigators then aimed to compared the efficacy and efficacy of different pulse duration between nanosecond and picosecond laser in the treatment of benign pigmented lesions.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •having any benign pigmented lesions on both sides of the face or any tattoo on any part of body which would like to be removed
- •Fitzpatrick skin phototype 3-5
排除标准
- •Previously treated with any laser within 3 months before enrollment into the study
- •Patients with lesions with any clinical suspicion of being pre-cancerous or skin malignancies of any kind
- •Patients who have photosensitive dermatoses
- •Pregnancy and lactation woman
- •Patients with wound infections (herpes, other) on the day of treatment
- •Patients with moderate and severe inflammatory acne, Immunosuppressed patients, history of vitiligo
- •Patients with unrealistic concerns/expectations and inability to do the appropriate post-operative care
研究组 & 干预措施
Picosecond laser
The pigmented lesions on this half-side of the face would be treated with picosecond laser.
For epidermal lesions, 1 laser treatment would be performed. For dermal lesions, 5 laser treatments would be performed every 3 month-interval.
The wavelength of 532 or 1064 nm would be chosen for appropriate lesions
干预措施: Picosecond laser (Device)
Q-switched Nd:YAG laser
The pigmented lesions on this half-side of the face would be treated with q-switched Nd:YAG laser.
For epidermal lesions, 1 laser treatment would be performed. For dermal lesions, 5 laser treatments would be performed every 3 month-interval.
The wavelength of 532 or 1064 nm would be chosen for appropriate lesions
干预措施: Q-switched Nd:YAG laser (Device)
结局指标
主要结局
Doctor evaluation of improvement using quartile scale
时间窗: For epidermal lesion: 1 and 3 months after 1 laser treatment. For dermal lesion: 1, 3 and 6 months after 5 laser treatments
Quartile scale 0-4
次要结局
- Patients evaluation of improvement using quartile scale(For epidermal lesion: 1 and 3 months after 1 laser treatment. For dermal lesion: 1, 3 and 6 months after 5 laser treatments)
- Side effect occurrence(immediately after treatments, 2, 3, 4, and 12 weeks after the 1st laser treatment, and added more 1, 3 and 6 months after 5 laser treatments for dermal lesions)
研究者
Woraphong Manuskiatti, M.D.
Professor
Mahidol University