Application of variable pulse width frequency doubled Nd:YAG 532 nm with HELP-G laser in the treatment of port-wine stains:a report of 32 cases / 中华医学美学美容杂志

ABSTRACT

Objective To treat a group of patients with port wine stains (PWS) using a variable pulse width (VPW) frequency doubled NdYAG 532nm with high energy long pulse green (HELP G) laser and to evaluate the clinical efficacy, side effects and different histological changes between VPW and HELP G. Methods Thirty two patients with PWS were treated in order to study the clinical improvement by transforming from 11～16 J/cm 2 at 3 mm spot size (VPW,7～10 ms) gradually to 16～24 J/cm 2 at 4～5 mm spot size (HELP G,15～50 ms). Two patients were biopsied before and after the laser treatment.Results After treatment of 1～8 times(3.19 average), very good results were achieved in 7 PWS, and excellent results were achieved in 15 PWS.Improvement was found in 68.75 % of the patients.Conclusion VPW with HELP G laser at 532 nm appears to be an effective treatment for PWS.