IRCT20180815040808N1 IRCT 2019-02-02 Tehran University of Medical Sciences Effect of double pass PDL in treatment of PWS To investigate the efficacy and safety of single pass Pulsed Dye Laser (PDL) with double pass Pulsed Dye Laser(PDL) ,within 20 minutes interval, for treatment of port wine stain(PWS) 2019-01-30 anticipated 23 Complete https://irct.ir/trial/33364 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Blocked randomization. N/A Port wine stain. Intervention 1: Intervention group 1 :Twenty three patients who have port wine stain included in the study.One part of the lesion which has been choosed randomly will recieve long pulse PDL laser with ( pulse duration 20 and fluence 13) .For example, Some of the patients will recieve the mentioned laser on the upper portion of the lesion, while others will recieve on the lower portion of the lesion. Patients will recieve laser in months 0,1&2. Intervention 2: Intervention group2:The same twenty three patients recieve short pulse Pulsed dye laser (PDL) ,( pulse duration 1.5 and fluence 11) , on the whole port wine stain (PWS), after 20 minutes in months 0,1&2. Yes - There is a plan to make this available What will be shared: IPD collected for the primary outcome measure only When: starting 6 months after publication To whom: people working in academic institutions Conditions: Scientific research Where to obtain: Zahra Razavi How to obtain: The application is sent by official university email which should contain the recipient's information and the purpose of his/her request. After having verified the accuracy of the information, files would be sent. Comments: