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Laser YAG long pulse sur peau noire


Le laser a été pendant longtemps réservé aux peaux caucasiennes. Grâce à un travail de recherche de dermatologues afro-américains, il est désormais possible de se faire traiter au laser pour les soins suivantes :

  • Epilation définitive

  • Traitement de la kéloide de la nuque

  • Tâches pigmentaires

Le laser en question, le Laser Yag LONG PULSE ND, possède une longueur d'onde deux fois plus élevée que celle des lasers classiques. En bref, celui-ci traverse l'épiderme sans y faire des dégâts (les anciens lasers provoquaient une augmentation de la production de mélanine sur la zone exposée, donc, de nouvelles tâches, étonnant, non ?).

 

Article de référence "Fonctionnement du laser Yag spécial sur peau noire"

Ci-dessous, j'introduis un article émanant d'un site américain de référence qui est une synthèse de plusieurs ouvrages scientifiques expliquant le fonctionnement des lasers Yag pour peaux noires. Piur l'instant, il est en anglais :

Laser Hair removal

Up until recent years, most of the published studies on laser therapy have focused on Caucasian skin. However, there is now an increasing amount of data on the use of lasers in blacks and other people of color. Such lasers are commonly referred to as ‘color-blind' lasers in the lay media, and they can be used for treating a range of conditions. Herein, I will discuss their use for hair removal in blacks.

Prior to the development of ‘color- blind' lasers, the ideal candidate for laser hair removal was a fair-skinned person with dark hair. The reason was that the contrast in the pigmentation between superficial layers of the skin (fair) and deeper hair follicles (dark) ensured that the laser energy reached its target (hair follicle) and was not absorbed by pigment in the superficial layers of the skin. In blacks, this theory did not hold true and the concern was that there was a risk that laser energy will be absorbed by the melanin pigment in the surface of the skin, prior to reaching its target in deeper layers of skin (hair follicles). This will produce complications such as scarring and pigmentary changes. The work of dedicated pioneers in this field demonstrated that the problem alluded to above could be reduced by using

1) longer wavelength lasers,

2) longer pulse duration of the lasers and

3) effective cooling of the skin while performing laser hair removal. This led to the development of ‘color-blind lasers' and currently in the U.S. the Food and Drug Administration has approved the Nd:YAG (1064nm) and Diode (810nm) lasers for hair removal in darker skin types. These lasers may be used by dermatologists as an adjunctive treatment for hirsutism (excessive hair growth, especially on the face of women), pseudofolliculitis barbae (shaving bumps) and acne keloidalis nuchae (please visit our skin section for an in-depth discussion of these skin disorders).

Pre-procedure

Broadly speaking, prior to undertaking laser hair removal it is important that your physician performs a test spot, allowing a 48-hour interval to assess your response to this test laser. By doing this, the physician can determine the most appropriate and safest settings for the hair removal laser. It is important that your physician performs a test spot that is in the same or similar area to be treated, with close match with regard to skin color, sun exposure and hair density.

A thorough medical history should also be undertaken prior to performing laser hair removal, this includes documentation and discussion about a personal or family history of keloid scarring and of active or chronic herpes viral infection (cold sores). A positive history of such herpes infection may lead your physician to give you prophylactic antiviral medication. The use of isotretinoin (used to treat acne) is thought to be a contraindication for performing laser hair removal. In this situation, the current recommendation is to stop this medication for 6 months prior to performing laser hair removal.

Procedure

During the procedure, the area to be treated will be wiped clean by your practitioner. Once the laser hair removal is undertaken, there may be a slight level of discomfort. This can be minimized by the use of topical anesthetic agents or cooling of the skin. If topical anesthetic agents are used, it is important that they are wiped away before laser hair removal is performed. Appropriate goggles should also be worn by both the treating physician and the patient. With treatment of the upper lip or chin, the enamel of the teeth should also be protected. During the procedure significant pain may indicate that the settings used for the laser is too high and for this reason such discomfort should be communicated to your physician.

Adverse effects

Adverse effects can be minimized, provided care is taken during the procedure to ensure safe settings of the laser are used, in association with appropriate cooling techniques. If adverse effects occur, the range of reactions that may be observed include crusting, scabbing and blistering of the skin, pigmentary alterations of the skin, scarring and folliculitis (inflammation of the hair follicles). Although the advent of color-blind lasers enables blacks and other people of color to undertake laser hair removal, my personal opinion is that before embarking on laser hair removal:

1. Always seek a trained physician who is qualified to perform this procedure (you can check with your country's professional dermatological organization for this information)

2. Once you have found a qualified individual, it is important to ensure that they are familiar and have experience treating skin of color

3. Always have a frank discussion with your physician on the possible risks associated with the procedure and any other suitable alternatives or adjunctive procedures

Article tiré du site : www.blackhealthmatters.org. Ce site a été créé par des professionnels de la sant anglais et américains.
 




autres articles du dossier "traitement dermatologique de la peau noire"

» La Peau Noire, les Peaux Ethniques
» Problèmes Fréquents de peaux noires et métisses
» Traitements & Soins
» Laser YAG long pulse sur peau noire
» Hygiène de la peau
» Dermatologues spécialisés peau noire
» Ressources "Peaux Ethniques"
» Maquillage des peaux ethniques
» Les actes de médecine esthétique pour peau noire
» Présentation de la solution de Jessner : peeling supporté par les peaux noires
» Des actifs éclaircissants naturels contre les tâches pigmentaires
» SilkPeel, traitement d'exfoliation combiné à une dermalinfusion légère
» Recettes de beauté naturelles pour sublimer votre peau noire : masques soin visage
» Acides de fruits en cosmétique : propriétés et utilisation, efficicacité
» Obagi Blue Peel, peeling moyen au TCA pour traiter les taches pigmentairs sur peau noire
» Les phototypes de peaux, et les effets sur les peelings et le laser
» Peeling sur peau noire : dermatologue spécialisée sur Paris

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