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Pulsed dye laser

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https://www.readbyqxmd.com/read/27911476/nd-yag-and-pulsed-dye-laser-therapy-in-infantile-hemangiomas-a-retrospective-analysis-of-271-treated-hemangiomas-in-149-children
#1
F Hartmann, A Lockmann, L-L Grönemeyer, H A Haenssle, M Zutt, H von Fintel, I Kühnle, M P Schön, K-M Thoms
BACKGROUND: Infantile hemangiomas (IH) are common benign tumors in infancy. Most IH resolve spontaneously, but some require treatment due to ulceration, functional impairment or cosmetic disfiguration. While systemic propranolol is effective in many cases, laser therapy may be a safe topical alternative. OBJECTIVE: To assess the efficacy of combined Nd:YAG/pulsed dye laser (PDL) or PDL alone for therapy of IH. PATIENTS AND METHODS: 271 IH in 149 infants were treated with combined Nd:YAG/PDL or PDL alone...
December 2, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27911144/comparison-of-pulsed-dye-laser-versus-combined-pulsed-dye-laser-and-nd-yag-laser-in-the-treatment-of-inflammatory-acne-vulgaris
#2
Manal Mohamed Salah El Din, Nevien Ahmed Samy, Amira Eid Salem
BACKGROUND: Both pulsed dye laser and combined 585/1,064-nm (sequential dual-wave-length PDL and Nd:YAG) laser improves inflammatory skin disorders including acne vulgaris. OBJECTIVE: To compare the efficacy of 585 nm pulsed dye laser versus sequential dual-wave-length PDL and Nd:YAG in treatment of acne vulgaris. PATIENTS AND METHOD: Thirty patients complaining of acne vulgaris were treated with a single pass of PDL alone on half of the face and a single pass of combined 585/1064-nm laser on the other half for four treatment sessions at 2 weeks interval, then assessed by the count and severity of the acne lesions & digital camera photographs Results: The study showed that inflammatory acne lesions count was significantly reduced by 82...
December 2, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27893539/comparative-efficacy-of-radiofrequency-and-pulsed-dye-laser-in-the-treatment-of-rosacea
#3
Sue-Jeong Kim, Young Lee, Young-Joon Seo, Jeung-Hoon Lee, Myung Im
BACKGROUND: Laser and light-based therapies have been used successfully in the treatment of rosacea; however, evidence is lacking regarding the efficacy of radiofrequency (RF). OBJECTIVE: This study evaluated the efficacy of RF in the treatment of rosacea compared with pulsed dye laser (PDL). METHODS: Thirty patients with rosacea (erythematotelangiectatic rosacea [ETR], n = 20; papulopustular rosacea [PPR], n = 10) were enrolled in a randomized, controlled, split-face study...
November 23, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/27879157/secondary-submucosal-vocal-cyst-following-pulsed-dye-laser-application-for-sulcus-vocalis
#4
Joo Hyun Kim, Hye Jin Hwang, Ji Hyung Kim, Min Seok Kang, Hong-Shik Choi, Hyung Kwon Byeon
CONCLUSION: Submucosal vocal cyst can occur as a distinct long-term sequelae following pulsed dye laser (PDL) application for sulcus vocalis. It is recommended that the cyst lesion should be surgically removed for treatment. Optimal and precise irradiation of PDL is considered important to avoid the development of a such complication. OBJECTIVE: After several years of clinical practice and an extended period of follow-up of the patients who received PDL application in treating sulcus vocalis, the authors have encountered several cases of secondary submucosal vocal cyst development...
November 23, 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27869377/physical-modalities-for-the-treatment-of-rosacea
#5
Maja A Hofmann, Percy Lehmann
Rosacea is characterised by a wide variety of vascular changes. Apart from telangiectasia and erythema, often so-called flushing occurs. These vascular abnormalities can be targeted with specific light and laser devices. In addition to KTP laser, pulsed dye laser (PDL) and Nd:YAG laser, also intense pulsed light devices (IPLs) are used. The described therapeutic effects include the reduction of vascular abnormalities and even improvement of papulopustular changes. While the KTP laser shows very good results in telangiectasia, the dye laser and IPL devices are used preferably in erythema...
December 2016: Journal der Deutschen Dermatologischen Gesellschaft, Journal of the German Society of Dermatology: JDDG
https://www.readbyqxmd.com/read/27868127/digital-dna-detection-based-on-a-compact-optofluidic-laser-with-ultra-low-sample-consumption
#6
Wonsuk Lee, Qiushu Chen, Xudong Fan, Dong Ki Yoon
DNA lasers self-amplify optical signals from a DNA analyte as well as thermodynamic differences between sequences, allowing quasi-digital DNA detection. However, these systems have drawbacks, such as relatively large sample consumption and complicated dye labelling. Moreover, although the lasing signal can detect the target DNA, it is superimposed on an unintended fluorescence background, which persists for non-target DNA samples as well. From an optical point of view, it is thus not truly digital detection and requires spectral analysis to identify the target...
November 21, 2016: Lab on a Chip
https://www.readbyqxmd.com/read/27848140/ph-effect-on-two-photon-cross-section-of-highly-fluorescent-dyes-using-femtosecond-two-photon-induced-fluorescence
#7
Krishnandu Makhal, Debabrata Goswami
Effect of solution pH on two-photon absorption cross-section of highly fluorescent Coumarin and Rhodamine dyes with high repetition rate femtosecond laser pulses at 780 nm is presented using two-photon induced fluorescence technique. A correspondence in the measured two-photon and single-photon cross-section values is seen when the pH changes from acidic to basic conditions (pH = 2-10) for solutions in 1:1 water-ethanol binary mixture. By plotting changes in the single-photon and two-photon fluorescence in this pH range, the excited state pKa values are found...
November 15, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27843919/rosacea-management
#8
REVIEW
Manal Abokwidir, Steven R Feldman
BACKGROUND: Rosacea is a chronic inflammatory skin condition associated with four distinct subtypes: erythematotelangiectatic, papulopustular, phymatous, and ocular. PURPOSE: To review the different kinds of management for all subtypes. METHODS: We divided rosacea management into three main categories: patient education, skin care, and pharmacological/procedural interventions. RESULTS: Flushing is better prevented rather than treated, by avoiding specific triggers, decreasing transepidermal water loss by moisturizers, and blocking ultraviolet light...
September 2016: Skin Appendage Disorders
https://www.readbyqxmd.com/read/27825211/vibrationally-resolved-lifetimes-of-the-2-1-%C3%AE-u-state-of-na2
#9
Roy B Anunciado, Seth Ashman, Lutz Hüwel
Lifetimes of partially resolved ro-vibrational levels of the Na2 2(1)Σu(+) double well state have been measured for the first time. Ground state sodium dimer molecules in a molecular beam are resonantly excited by the doubled output of a 10 ns pulsed dye laser in the range 333-357 nm. After being allowed to decay for a predetermined time interval, the surviving excited molecules are ionized by 532 nm photons from a delayed Nd:YAG laser and detected in a linear time-of-flight mass spectrometer. By appropriate tuning of the excitation laser and systematic variation of the probe laser delay, lifetimes are obtained for vibrational levels in the range from 22 to 57...
November 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27813235/effects-of-liquid-medium-and-ablation-wavelength-on-properties-of-cadmium-sulfide-nanoparticles-by-pulsed-laser-ablation
#10
Grisel Garcia Guillen, Veronica Anahi Zuñiga Ibarra, Maria Isabel Mendivil Palma, Bindu Krishnan, David Avellaneda Avellaneda, Sadasivan Shaji
Pulsed laser ablation in liquid (PLAL) is a green synthesis technique to obtain semiconductor nanomaterials in colloidal form. In this work, cadmium sulfide (CdS) nanoparticles were synthesized by pulsed laser ablation of a CdS target in different liquid media using 532 and 1064 nm outputs from a pulsed (10 ns, 10 Hz) Nd:YAG laser at different ablation fluence. Morphology, structure, crystalline phase, elemental composition, optical and luminescent properties of CdS nanomaterials were analyzed using Transmission Electron Microscopy (TEM), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS), UV-Visible absorption spectroscopy and fluorescence spectroscopy...
November 3, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/27807502/near-infrared-dye-loaded-magnetic-nanoparticles-as-photoacoustic-contrast-agent-for-enhanced-tumor-imaging
#11
Chuang Gao, Zi-Jian Deng, Dong Peng, Yu-Shen Jin, Yan Ma, Yan-Yan Li, Yu-Kun Zhu, Jian-Zhong Xi, Jie Tian, Zhi-Fei Dai, Chang-Hui Li, Xiao-Long Liang
Objective: Photoacoustic (PA) tomography (PAT) has attracted extensive interest because of its optical absorption contrast and ultrasonic detection. This study aims to develop a biocompatible and biodegradable PA contrast agent particularly promising for clinical applications in human body. Methods: In this study, we presented a PA contrast agent: 1, 2-distearoyl-sn-glycero-3-phosphoethanolamine- N-[methoxy (polyethylene glycol)] (DSPE-PEG)-coated superparamagnetic iron oxide (SPIO) nanoparticles (NPs) loaded with indocyanine green (ICG)...
September 2016: Cancer Biology & Medicine
https://www.readbyqxmd.com/read/27791434/a-comparative-study-of-pulsed-dye-laser-versus-long-pulsed-nd-yag-laser-treatment-in-recalcitrant-viral-warts
#12
Yo Sup Shin, Eun Byul Cho, Eun Joo Park, Kwang Ho Kim, Kwang Joong Kim
BACKGROUND: Viral warts are common infectious skin disease induced by human papillomavirus (HPV). But the treatment of recalcitrant warts is still challenging. OBJECTIVE: In this study, we compared the effectiveness of pulsed dye laser (PDL) and long pulsed Nd:YAG (LPNY) laser in the treatment of recalcitrant viral warts. METHODS: We retrospectively analyzed the medical records of patients with recalcitrant warts treated with laser therapy between January 2013 and February 2016...
November 15, 2016: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/27778355/skin-pre-ablation-and-laser-assisted-microjet-injection-for-deep-tissue-penetration
#13
Hun-Jae Jang, Seonggu Yeo, Jack J Yoh
BACKGROUND AND AIMS: For conventional needless injection, there still remain many unresolved issues such as the potential for cross-contamination, poor reliability of targeted delivery dose, and significantly painstaking procedures. As an alternative, the use of microjets generated with Er:YAG laser for delivering small doses with controlled penetration depths has been reported. In this study, a new system with two stages is evaluated for effective transdermal drug delivery. First, the skin is pre-ablated to eliminate the hard outer layer and second, laser-driven microjet penetrates the relatively weaker and freshly exposed epidermis...
October 25, 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27762482/treatment-of-erythematotelangiectatic-rosacea-with-the-fractionation-of-high-fluence-long-pulsed-595-nm-pulsed-dye-laser
#14
Jin Ok Baek, Hoon Hur, Ha Ryeong Ryu, Jeong Soo Kim, Kyung Real Lee, Yu Ri Kim, Kwang Ho Choi
Various lasers have been used for the treatment of erythematotelangiectatic rosacea (ETR) that does not respond to systemic or topical therapy. The pulsed dye lasers (PDLs) are an effective option for ETR, and the purpuragenic fluence proved to be superior until now. Given that purpura and subsequent possible postinflammatory hyperpigmentation (PIH) are occasionally unbearable in some patients, and several studies using the low nonpurpuragenic fluence were reported. To deliver the sufficient high fluence of a PDL without generating purpura, we designed the fractionation of high fluence using five passes and longer pulse duration (6 milliseconds) of a PDL in succession...
October 20, 2016: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/27746641/prospective-comparison-of-dual-wavelength-long-pulsed-755-nm-alexandrite-1-064-nm-neodymium-yttrium-aluminum-garnet-laser-versus-585-nm-pulsed-dye-laser-treatment-for-rosacea
#15
Hyun-Min Seo, Jung-In Kim, Han-Saem Kim, Young-Jun Choi, Won-Serk Kim
BACKGROUND: Rosacea treatments including oral/topical medications and laser therapy are numerous but unsatisfactory. OBJECTIVE: To compare the effectiveness of the dual wavelength long-pulsed 755-nm alexandrite/1,064-nm neodymium: yttrium-aluminum-garnet laser (LPAN) with that of 585-nm pulsed dye laser (PDL) for rosacea. METHODS: This was a randomized, single-blinded, comparative study. Full face received four consecutive monthly treatments with LPAN or PDL, followed-up for 6 months after the last treatment...
October 2016: Annals of Dermatology
https://www.readbyqxmd.com/read/27703217/re-evaluation-of-all-plastic-organic-dye-laser-with-dfb-structure-fabricated-using-photoresists
#16
Naoto Tsutsumi, Saori Nagi, Kenji Kinashi, Wataru Sakai
Organic solid-state lasers (OSSLs) with distributed feedback structures can detect nanoscale materials and therefore offer an attractive sensing platform for biological and medical applications. Here we investigate the lasing characteristics, i.e., the threshold and slope efficiency, as a function of the grating depth in OSSL devices with distributed feedback (DFB) structure fabricated using photoresists. Two types of photoresists were used for the DFB structures: a negative photoresist, SU-8 2002, and a positive photoresist, ma-P 1275...
October 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27670126/light-therapies-for-acne
#17
Jelena Barbaric, Rachel Abbott, Pawel Posadzki, Mate Car, Laura H Gunn, Alison M Layton, Azeem Majeed, Josip Car
BACKGROUND: Acne vulgaris is a very common skin problem that presents with blackheads, whiteheads, and inflamed spots. It frequently results in physical scarring and may cause psychological distress. The use of oral and topical treatments can be limited in some people due to ineffectiveness, inconvenience, poor tolerability or side-effects. Some studies have suggested promising results for light therapies. OBJECTIVES: To explore the effects of light treatment of different wavelengths for acne...
September 27, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27669109/split-lesion-randomized-comparative-study-between-long-pulsed-nd-yag-laser-532-and-1-064%C3%A2-nm-in-treatment-of-facial-port-wine-stain
#18
Muhsin A Al-Dhalimi, Murtadha H Al-Janabi
BACKGROUND: Lasers have been the treatment of choice for Port-wine stain (PWS). However, only one type of laser is not a panacea for all PWS malformations. This is may be due to the great heterogeneity of phenotypic presentation of this congenital anomaly as color, depth, and the site of the lesion. For the treatment of PWS, flash lamp-pumped pulsed dye laser, carbon dioxide, argon, krypton, copper bromide, frequency-doubled neodymium:yttrium-aluminum-garnet (Nd:YAG), and also intense pulsed light sources can be used...
November 2016: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/27631010/nonconventional-use-of-flash-lamp-pulsed-dye-laser-in-dermatology
#19
Steven Nisticò, Piero Campolmi, Silvia Moretti, Ester Del Duca, Nicola Bruscino, Rossana Conti, Andrea Bassi, Giovanni Cannarozzo
Flash-lamp pulsed-dye laser (FPDL) is a nonablative technology, typically used in vascular malformation therapy due to its specificity for hemoglobin. FPDL treatments were performed in a large group of patients with persistent and/or recalcitrant different dermatological lesions with cutaneous microvessel involvement. In particular, 149 patients (73 males and 76 females) were treated. They were affected by the following dermatological disorders: angiokeratoma circumscriptum, genital and extragenital viral warts, striae rubrae, basal cell carcinoma, Kaposi's sarcoma, angiolymphoid hyperplasia, and Jessner-Kanof disease...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27592366/delayed-luminescence-of-erythrosine-in-biological-tissue-and-photodynamic-therapy-dosimetry
#20
S N Letuta, S N Pashkevich, A T Ishemgulov, Yu D Lantukh, E K Alidzhanov, S S Sokabaeva, V V Bryukhanov
The features of delayed fluorescence (DF) and phosphorescence in erythrosine stained healthy and cancer-diseased mammary gland tissues of BYRB-line mice were investigated in vitro. Thermoactivated delayed fluorescence (TDF), triplet-triplet annihilation (TTA) and originated from singlet-triplet annihilation (STA) delayed fluorescence are investigated as competing channels of radiative relaxation of the triplet states of erythrosine. The dominant role of diffusive-mobile molecular oxygen in deactivation of triplet-excited long-live states of the dye molecules in cells is determined...
October 2016: Journal of Photochemistry and Photobiology. B, Biology
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