Skip to content

A Randomized, Evaluator-blinded Comparative Study of Potassium Titanyl Phosphate (KTP) 532-nm Picosecond Laser and Alexandrite 755-nm Picosecond Laser for the Treatment of solar Lentigines in Asians

A Randomized, Evaluator-blinded Comparative Study of Potassium Titanyl Phosphate 532-nm Picosecond Laser and Alexandrite 755-nm Picosecond Laser for the Treatment of solar Lentigines in Asians

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
TCTR
Registry ID
TCTR20210408004
Enrollment
30
Registered
2021-04-08
Start date
2020-05-01
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Reduction of solar lentigines Solar lentigines laser hyperpigmentation aging spot

Interventions

treated with this device once,treated with this device once
Active Comparator Device,Experimental Device
KTP 532-nm picosecond laser,Alexandrite 755-nm picosecond laser

Sponsors

Division of Dermatology, Department of medicine, Faculty of Medicine, Ramathibodi hospital
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 80 Years

Inclusion criteria

Inclusion criteria: Subjects had at least two similar solar lentigines with the diameter more than 5 mm at either arm.

Exclusion criteria

Exclusion criteria: were patients with other skin diseases including active skin infection, skin inflammation and wound, those who received any topical medication or laser therapy 3 month prior to the enrollment, immunocompromised patients or currently on isotretinoin or immunosuppressive agents, those who had a previous history of keloid and skin cancer, and pregnant and lactating women.

Design outcomes

Primary

MeasureTime frame
Mean luminance score evaluate at every visit colorimeter (DSM II ColorMeter)

Secondary

MeasureTime frame
Improvement score evaluate at every visit 5-point rating scale

Countries

Thailand

Contacts

Public ContactVasanop Vachiramon

Faculty of Medicine, Ramathibodi hospital

vasanop@gmail.com0946369165

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026