Read by QxMD icon Read

Pulsed dye laser

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
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
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
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
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...
September 26, 2016: Lasers in Surgery and Medicine
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
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
Eric L Maranda, Lisa Akintilo, Kelsey Hundley, Austin H Nguyen, Kevin J Moore, Joseph Zullo, Joaquin J Jimenez
Pearly penile papules (PPP) present as dome-shaped papules of no more than 3 mm in diameter that line the base of the glans of the penis. These benign lesions affect between 14.3 and 48 % of men. While often asymptomatic, PPP can cause a great deal of psychological distress that may warrant treatment. Current treatment options include cryotherapy, electrodessication, and curettage (ED&C). However, these modalities may have considerable adverse cosmetic effects, including scarring, pain, and pigmentary changes...
September 2, 2016: Lasers in Medical Science
Matjaž Humar, Fumito Araoka, Hideo Takezoe, Igor Muševič
Dye doped photocurable cholesteric liquid crystal was used to produce solid Bragg onion omnidirectional lasers. The lasers were produced by dispersing and polymerizing chiral nematic LC with parallel surface anchoring of LC molecules at the interface, extracted and transferred into another medium. Lasing characteristics were studied in carrier medium with different refractive index. The lasing in spherical cholesteric liquid crystal was attributed to two mechanisms, photonic bandedge lasing and lasing of whispering-gallery modes...
August 22, 2016: Optics Express
Stanislav Gurbatov, Aleksandr Kuchmizhak, Oleg Vitrik, Yuri Kulchin
Pulsed laser nanotexturing of metal films represents an ultra-fast, high-performance and cost-effective processing technology for fabrication of various functional surfaces widely used in plasmonics, biosensing, and photovoltaics. However, this approach usually requires high-NA lenses to focus a laser beam onto a few-micron spot as well as a micropositioning platform to move this spot along the sample surface, which increases the cost of the produced functional surfaces and limits the performance of laser-assisted nanotexturing techniques...
August 22, 2016: Optics Express
Ibrahim Khansa, Bridget Harrison, Jeffrey E Janis
BACKGROUND: Scars represent the visible sequelae of trauma, injury, burn, or surgery. They may induce distress in the patient because of their aesthetically unpleasant appearance, especially if they are excessively raised, depressed, wide, or erythematous. They may also cause the patient symptoms of pain, tightness, and pruritus. Numerous products are marketed for scar prevention or improvement, but their efficacy is unclear. METHODS: A literature review of high-level studies analyzing methods to prevent or improve hypertrophic scars, keloids, and striae distensae was performed...
September 2016: Plastic and Reconstructive Surgery
N Vargas-Navia, E Baselga, F Z Muñoz-Garza, L Puig
No abstract text is available yet for this article.
August 20, 2016: Actas Dermo-sifiliográficas
Zachary A Steelman, Gleb P Tolstykh, Hope T Beier, Bennett L Ibey
Nanosecond electric pulses (nsEP's) are a well-studied phenomena in biophysics that cause substantial alterations to cellular membrane dynamics, internal biochemistry, and cytoskeletal structure, and induce apoptotic and necrotic cell death. While several studies have attempted to measure the effects of multiple nanosecond pulses, the effect of pulse repetition rate (PRR) has received little attention, especially at frequencies greater than 100 Hz. In this study, uptake of Propidium Iodide, FM 1-43, and YO-PRO-1 fluorescent dyes in CHO-K1 cells was monitored across a wide range of PRRs (5 Hz-500 KHz) using a laser-scanning confocal microscope in order to better understand how high frequency repetition rates impact induced biophysical changes...
September 23, 2016: Biochemical and Biophysical Research Communications
Brendan M Wong, Jeffrey Keilman, Jennifer Zuccaro, Charis Kelly, Jason T Maynes, Joel S Fish
The use of ablative fractional carbon dioxide laser therapy and pulsed dye laser therapy has led to significant improvements in the rehabilitation of hypertrophic burn scars. However, laser procedures are associated with appreciable pain among pediatric patients. Clinical consensus suggests using general anesthesia for pediatric laser procedures; however, guidelines for perioperative care are lacking. The objective of this quality improvement study is to determine whether a difference exists in postoperative pain outcomes in pediatric patients who receive intraoperative opioid regimens compared with patients who receive opioid-sparing regimens for laser therapy of hypertrophic burn scars...
August 15, 2016: Journal of Burn Care & Research: Official Publication of the American Burn Association
Zhihai Qiu, Guangping Yao, Defu Chen, Ying Wang, Ying Gu, Buhong Li
Characterizing port wine stains (PWS) with its optical parameters [i.e. absorption coefficient (μ a) and reduced scattering coefficient (μ s')] and microvascular parameters [i.e. blood volume fraction (BVF), mean vessel diameter (MVD), and oxygen saturation (StO2)] is extremely important for elucidating the mechanisms for its light-based treatments, such as pulsed dye laser and photodynamic therapy. In this study, a customized diffuse reflectance spectroscopy (DRS) probe with an appropriate source-detector distance was used to measure the diffuse reflectance spectra of PWS lesions in clinical practice...
2016: Advances in Experimental Medicine and Biology
Antoanela Čarija, Neira Puizina-Ivić, Dubravka Vuković, Lina Mirić Kovačević, Vesna Čapkun
BACKGROUND AND OBJECTIVE: To compare a single treatment of PDL-PDT with PDT for BCCs in terms of efficacy, aesthetic outcome, and pain in patients with multiple BCCs. STUDY DESIGN/MATERIALS AND METHODS: A prospective, controlled, intra-individual, investigator-blinded study was conducted on 15 patients with 62 BCCs. The BCCs on an individual patient were divided into two similarly-sized groups, and treated with PDT (630nm LED light source, fluence rate=30mW/cm(2), total dose of 150J/cm(2)) and 585 nm-PDL-PDT (spot size=7mm, fluence=10J/cm(2), pulse duration=10ms, 10% overlap, three passes, and cooling)...
August 8, 2016: Photodiagnosis and Photodynamic Therapy
Hyeong-Rae Kim, Sue-Jeong Kim, Myung Im, Young Lee, Young-Joon Seo, Jeung-Hoon Lee
No abstract text is available yet for this article.
August 2016: Annals of Dermatology
Judith Weber, Paul C Beard, Sarah E Bohndiek
Photoacoustic imaging (PAI) is an emerging tool that bridges the traditional depth limits of ballistic optical imaging and the resolution limits of diffuse optical imaging. Using the acoustic waves generated in response to the absorption of pulsed laser light, it provides noninvasive images of absorbed optical energy density at depths of several centimeters with a resolution of ∼100 μm. This versatile and scalable imaging modality has now shown potential for molecular imaging, which enables visualization of biological processes with systemically introduced contrast agents...
July 28, 2016: Nature Methods
Jianlong Wang, Yating Zhang, Mingxuan Cao, Xiaoxian Song, Yongli Che, Haiting Zhang, Heng Zhang, Jianquan Yao
The resonance characteristics of platinum-scatter-based random lasers from dye-doped polymer-dispersed liquid crystals (DDPDLCs) in capillary tubes were researched for the first time, to the best of our knowledge. After adding platinum nanoparticles (Pt NPs) into the liquid crystal mixtures, the emission spectra of DDPDLCs revealed a lower lasing threshold in comparison with those of DDPDLCs without Pt NPs due to light scattering of liquid crystal droplets and the local field enhancement around Pt NPs. Furthermore, the full width at half-maximum (FWHM) and the lasing threshold were determined by the doping density of the Pt NPs...
July 20, 2016: Applied Optics
Shigeyuki Furuta, Hideaki Sato, Shiho Tsuji, Fumiko Murakami, Hiroaki Kitagawa
PURPOSE: To investigate the efficacy of our treatment of infantile hemangioma (IH)s retrospectively presenting as disfiguring or functionally threatening lesions. MATERIALS AND METHODS: 25 infants with IH treated with long-pulsed dye laser or laser with or without propranolol. Tumor fading after treatment was evaluated using both color and size rating scales, before, during and after treatment. RESULTS: 6 infants were treated by laser, 11, oral propranolol and 8 using both treatments...
September 2016: Pediatric Surgery International
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"