Relation between skin surface temperature and minimal blanching during argon, Nd-YAG 532, and CW dye 585 laser therapy of port-wine stains
✍ Scribed by S. Mordon; C. Beacco; G. Rotteleur; J. M. Brunetaud
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 309 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0196-8092
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✦ Synopsis
Abstract
Laser photocoagulation has proven to be valuable in the treatment of port‐wine stains. In this application, the minimal blanching technique is used as an indicator of suitable dosage since it has been demonstrated that the immediate appearance a white mark is required to achieve permanent blanching a few months later. The objective of the investigations undertaken in this study was to correlate the temperature attained at the surface of port‐wine stains with immediate blanching, upon irradiation with different laser fluences. A comparative study was performed using an argon laser (all lines), a 532 nm Nd:YAG and a 585 nm argon pumped dye laser. Surface temperature was studied using an infrared camera. Temperature was measured on 10 different port‐wine stains using different fluences. Whitening threshold fluence was related to surface temperature. It appeared that whitening threshold fluence corresponded to a surface temperature of 53°C (±3°C). The whitening threshold fluence was dependent on port‐wine stains and wavelength. However, whitening threshold fluence remained lower for 532 nm and 585 nm and it correlated to the absorption curve of hemoglobin. © 1993 Wiley‐Liss, Inc.