Principles and Practices of Fractional Carbon Dioxide Laser / 대한피부과학회지

Carbon dioxide (CO2) laser is one of the most widely used lasers in dermatology. CO2 laser can precisely ablate the skin with good hemostasis, which makes it an ideal surgical laser. With the development of pulsed CO2 laser, which enabled cleaner ablation with less residual thermal damage, CO2 laser resurfacing became the gold standard for skin rejuvenation. The rejuvenation effect of full-face CO2 laser resurfacing is unparalleled to other methods; however, it is associated with a relative high incidence of side effects and prolonged downtime. Fractional CO2 laser was developed to overcome this problem. With a new technology of fractionating the laser beam into hundreds of microbeams, fractional CO2 laser resurfacing can improve various skin conditions including skin laxity, photodamage, and acne scars with short downtime and significantly lesser side effects. For optimal treatment results, clinicians have to decide the treatment depth and density based on proper understanding of the laser tissue interaction and underlying skin conditions.

Terapia fotodinâmica: relato de caso / Photodynamic therapy: case report

A terapia fotodinâmica (PDT) utiliza um agente fotossensibilizante, luz e oxigênio molecular para matar seletivamente certos tipos de células. Na Dermatologia, utiliza-se o PDT com sucesso no tratamento de câncer de pele não melanoma e lesões prémalignas. A introdução do ácido aminolevulínico (ALA) diminuiu a morbidade do PDT e isso despertou novos interesses para seu uso, como o tratamento de dermatoses inflamatórias e um adjuvante nos tratamentos de fotorrejuvenescimento. Este artigo avalia uma paciente fotoenvelhecida tratada com o PDT.

Tratamento com laser fracionado / Fractional laser treatment

Os lasers ablativos, como o laser de CO2 (10.600 nm) e o erbium:YAG (Er:YAG-2.940 nm), removem a epiderme e provocam dano térmico residual na derme. Apresentam algumas desvantagens, como tempo de recuperação prolongado, não podem ser usados fora do rosto e têm risco significativo de efeitos colaterais. Para reduzir esses efeitos colaterais, surgiram os lasers não ablativos, que penetram profundamente na pele e aquecem a derme, poupando a epiderme. Seus efeitos colaterais e o tempo de recuperação são mínimos porém, comparado ao resurfacing ablativo, têm eficácia modesta e requerem múltiplos tratamentos. Lasers fracionados não ablativos foram desenvolvidos para rejuvenescimento cutâneo semelhante ao do laser de CO2, sem os inconvenientes e o pós-operatório deste. O princípio do laser fracionado é poupar áreas de pele sãs entre as áreas tratadas, facilitando e promovendo uma cicatrização mais rápida a partir das áreas poupadas. O resurfacing fracionado não ablativo apresenta bons resultados para o tratamento de rugas finas a moderadas e outros sinais do fotoenvelhecimento cutâneo. Outras indicações são cicatrizes atróficas, cicatrizes de acne, cicatrizes cirúrgicas e há relatos da eficácia no melasma. O tempo de recuperação é rápido, mas os resultados são inferiores aos obtidos com os tratamentos ablativos. Recentemenente surgiram os lasers fracionados ablativos de CO2 (10.600 nm) e érbio (Er:YAG 2.940 nm), com o intuito de se alcançar um resultado semelhante ao dos lasers ablativos, porém com recuperação e risco de efeitos colaterais mais próximos ao dos lasers fracionados não ablativos, já que também poupam áreas de pele sãs entre as áreas tratadas.

Investigation of therapeutic effects of variable pulse light in pigment patch and telangiectasis / 重庆医科大学学报

Objective:To Investigate the therapeutic effects of variable pulse light(VPL)in pigment patch and telangiectasis. Methods:126 cases were involved in our study. They were treated 5 times at interval 3 weeks by using photorejuvenation machine (Energist ULTRATM). The face was took photo before and after treatment, the judgement of results was made after the course was completed. Results:The effective rates for pigment patch and telangiectasis were 87.84%,and 90.38% respec- tively. No severe side effect were observed. Conclusion:The treatment of variable pulse light is an effective and safty method for pigment patch and telangiectasis.

Three Cases of Facial Photorejuvenation by Intense Pulsed Light Quantum SR(TM) / 대한피부과학회지

Intense pulsed light (IPL) Quantum SR(TM) systems are high-intensity light sources, which emit polychromatic light. Unlike laser systems, these flashlamps work with noncoherent light in a broad wavelength spectrum of 560-1200 nm. IPL Quantum SR(TM) has been effective for the treatment of photoaging skin as a nonablative method. Three patients with photoaged skin were treated with fifth full-face treatments at 3-4 week intervals using IPL Quantum SR(TM). The cut-off filters of 560 nm and integrated contact cooling system were utilized for treatments. After the last treatments, the patients showed the overall improvement in clinical appearance, reduction in pigmentation and telangiectasia and fine wrinkle with smoothening of skin textures. Histological evaluations showed new collagen production after treatment. Full-face photorejuvenation using IPL Quantum SR(TM) can be an effective treatment modality for photoaged skin. We report herein IPL photorejuvenation is safe and effective in skin rejuvenation.

Full-face photorejuvenation of photodamaged skin by intense pulsed light and 755nm laser / 中华医学美学美容杂志

Objective To observe the clinical curative effect of photorejuvenation of photodamaged skin by intense pulsed light (IPL) and 755nm laser. Methods A total of 187 patients were treated with a series of five or more full-face treatments using IPL and 755nm laser alternatly. After the treatement, the patients and physicians subjectively evaluated improvement in five aspects, including color of the face, telangiectasia, pore, pigmentation, and skin texture. Results According to comprehensive evaluation of the five aspects by the patient and physicians, and as compared to the first score, significant difference was observed (P