title: [Use of frequency doubled Nd-YAG laser and automatic scanning in the treatment of portwine hemangioma].
abstract: The authors report their experience in the treatment of portwine stains by means of two recent improvements. The first improvement concerns the use of frequency doubled Nd-YAG laser which emits at 532 nanometres. This wave-length corresponds to an absorption peak of haemoglobin and is therefore more selectively absorbed by haemangiomatous tissue. This helps to explain the better clinical results obtained and the elimination of the other effects classically induced by argon laser, with complete preservation of the healthy, non-angiomatous skin as well as skin and scalp hair. Treatment is consequently facilitated, as illustrated by a series of 79 patients who received a total of 92 treatment sessions over a period of 14 months. The second improvement consists of the addition of an automat which allows the beam to be used continuously with scanning of adjacent bands. This automat not only allows a very homogeneous treatment by eliminating all of the errors associated with manual scanning, but can also be used to treat large portwine stains in a single session instead of the multiple sessions required previously. An interval of 5 to 6 months should be respected before treating the residual part of the portwine stain situated more deeply in the dermis, which should be considered to be a new portwine stain. The combination of these two apparatuses allows fluences (fluence is the product of the power selected by the exposure time per unit area) of only 8 to 15 joules/cm2 due to the dynamics of the treatment in contrast with other static modalities which require higher fluences.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Service de Chirurgie Plastique, C.H.U., Toulouse.
authors.forename: F
authors.initials: F
authors.lastname: Laffitte
authors.forename: J P
authors.initials: JP
authors.lastname: Chavoin
authors.forename: S
authors.initials: S
authors.lastname: Mordon
authors.forename: D
authors.initials: D
authors.lastname: Rouge
authors.forename: M
authors.initials: M
authors.lastname: Costagliola
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006391:Hemangioma / Q000601:surgery*; D006801:Humans; D053685:Laser Therapy / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D012878:Skin Neoplasms / Q000601:surgery*; D013997:Time Factors
vernacular_title: Utilisation du laser Nd-YAG double en fréquence et en balayage automatique dans le traitement des angiomes plans.