Comparison study of a long‐pulse pulsed dye laser and a long‐pulse pulsed alexandrite laser in the treatment of port wine stains

Abstract

LPPAL works best with hypertrophic, purple PWSs, while LPPDL yields better clinical improvements with the flat, pink PWSs. Targeting of deoxyhemoglobin, deeper penetration, and higher fluence may explain the effectiveness of LPPAL in purple, hypertrophic PWSs. However, there is a risk of dyspigmentation when using the LPPAL.

Cr+3 Distribution in Al1 and Al2 Sites of Alexandrite (BeAl2O4: Cr3+) Induced by Annealing, Investigated by Optical Spectroscopy

“…Previous published data [13] show that spectroscopic properties of Cr 3+ ion in alexandrite are similar to 3 . In all of them, the spectra present two well defined lines 4 A 2g  2 E g (R lines) and two wide absorption bands.…”

“…Alexandrite emission can be tuned in the range 700-800nm [2]. There is a great interest for the alexandrite laser in the present days since it has been vastly used for medical purposes, presenting superior performance compared to other lasers [3][4][5]. The combination of the chromIum doping and chrysoberyl matrix leads to very favorable properties.…”

An overview of clinical and experimental treatment modalities for port wine stains

“…65–68 This laser system has proven particularly useful in the treatment of hypertrophic and PDL-resistant PWS, 65,69 especially when used in conjunction with the PDL. A study on the PDL/ alexandrite laser dual approach (λ = undisclosed wavelength/755 nm) demonstrated significant lightening in all of 3 patients with hypertrophic PWS and moderate lightening in 12 of 17 patients with PDL-resistant PWS.…”

Hypertrophy in port-wine stains: Prevalence and patient characteristics in a large patient cohort

“…Previous studies have investigated the response of hypertrophic PWS using different settings of PDL, long-pulsed neodymium:yttrium-aluminum-garnet, carbon dioxide, and (long-pulsed) alexandrite lasers, with various outcomes. [18][19][20][21][22][23] Patients should be informed about the natural course of PWS and more attention needs to be drawn to therapy and prevention of hypertrophic PWS.…”