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題 名 | Cryogen Spray Cooling in Conjunction with Pulse Dye Laser Treatment of Port Wine Stains of the Head and Neck=噴射冷卻合併脈衝染料雷射治療頭頸部葡萄酒色斑 |
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作 者 | 黃培書; 張承仁; | 書刊名 | 長庚醫學 |
卷 期 | 24:8 2001.08[民90.08] |
頁 次 | 頁469-475 |
分類號 | 415.68 |
關鍵詞 | 葡萄酒色斑; 噴射冷卻; 脈衝染料雷射; Port wine stain; Cryogen spray cooling; Flashlamp-pumped pulse dye laser; |
語 文 | 英文(English) |
英文摘要 | Background: When a cryogen spurt is applied to the skin surface for an appropriately short period of time, the spatial distribution of cooling remains localized in the normal overlying epidermis, while leaving the temperature of deeper port wine stain (PWS) blood vessels unchanged. Furthermore, cooling continues after pulsed laser exposure as cryogen remaining on the surface evaporates and removes heat deposited by light absorption in epidermal melanin. The objective of this study was to evaluate the efficacy and advantages of cryogen spray cooling plus flashlamp-pumping in conjunction with dye laser treatment (CSC-LT) of PWS. Methods: From 1996 to 2000, a retrospective study was conducted on 63 patients, consisting of 43 women and 20 men, between the ages of 8 and 62 years treated with pulsed dye laser (l = 585 nm, tp = 450 msec) over a 4-year period. The duration of cryogen spurts and the delay period between cryogen delivery and laser illumination were controlled. An infrared focal plane array thermodetector measured changes of lesion surface temperature which were recorded. The subject was asked to score discomfort during treatment using a pain scale. The primary efficacy measure was the quantitative assessment of a blanching response score. Results: The ambient skin surface temperature of PWS was 33.31!O1.55 ¢J. The mean pain score for uncooled sites was 39.85!O0.23 compared to 20.18!O0.15 for cooled sites. There was a statistically significant difference in pain elimination between cooled and uncooled sites (p=0.001). The mean blanching response score of CSC-LT was 3.70. A significant blanching response of PWS when receiving CSC-LT was noted. Conclusion: Our clinical studies demonstrate the feasibility of selective epidermal cooling while achieving photothermolysis of blood vessels during pulsed dye laser treatment of PWS. (Chang Gung Med J 2001;24:469-75) |
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