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https://www.readbyqxmd.com/read/29140537/using-normal-and-high-pulse-coverage-with-picosecond-laser-treatment-of-wrinkles-and-acne-scarring-long-term-clinical-observations
#1
Christine Dierickx
OBJECTIVE: The picosecond 755 nm alexandrite laser using a diffractive lens array has demonstrated consistent clinical efficacy for improving the appearance of acne scarring and wrinkles amongst other benefits. This small pilot study is to assess the difference, if any, in clinical benefit if a higher than the standard protocol for number of pulses delivered to a tissue area is used compared to the standard protocol guidelines. METHOD: Seven subjects received treatment to one side of the face with a standard protocol number of laser pulses with the other side of the face receiving higher than standard number of pulses from the same 755 nm picosecond laser using an additional diffractive lens array...
November 15, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29135036/prospective-studies-of-the-efficacy-and-safety-of-the-picosecond-755-1-064-and-532%C3%A2-nm-lasers-for-the-treatment-of-infraorbital-dark-circles
#2
Monique J Vanaman Wilson, Isabela T Jones, Joanna Bolton, Lisa Larsen, Douglas C Wu, Mitchel P Goldman
BACKGROUND: Infraorbital dark circles result from a combination of factors. The fractionated picosecond 755 nm alexandrite laser and dual wavelength picosecond Nd:YAG laser have not been examined as a method of addressing infraorbital hyperpigmentation. OBJECTIVE: To determine the efficacy and safety of treatment of infraorbital dark circles using fractionated picosecond 755 nm and dual wavelength picosecond Nd:YAG laser. METHODS AND MATERIALS: These trials did not utilize a comparative design; rather, these were separate, prospective, open-label, evaluator-blinded trials utilizing two treatment regimens: (i) 19 adult subjects were treated in a single session with the dual wavelengths of 532 nm and 1,064 nm in consecutive passes using the fractionated lens; (ii) 10 adult subjects were treated using the picosecond 755 nm laser via the fractionated lens in three treatment sessions at 3 week intervals...
November 14, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29135033/primary-and-salvage-laser-surgery-of-341-glottic-cancers-comparison-of-treatment-outcomes-between-university-head-neck-tertiary-referral-center-and-local-head-neck-department
#3
Piotr Winiarski, Artur Lewandowski, Grażyna Greczka, Jacek Banaszewski, Hanna Klimza, Małgorzata Wierzbicka
OBJECTIVE: The main goal was to compare the clinical data of patients with T1 and T2 glottic cancer treated with CO2 transoral laser microlaryngoscopy (TLM) in the Tertiary Referral University Department of Otolaryngology, Head Neck Surgery, Poznan and the local Department of Otolaryngology, Oncology and Maxillofacial Surgery, Bydgoszcz. MATERIAL AND METHODS: Unified databases for the 7-year period January 2005-December 2011 were created to compare these two cohorts...
November 14, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29131366/successful-and-safe-use-of-q-switched-lasers-in-the-treatment-of-nevus-of-ota-in-children-with-phototypes-iv-vi
#4
Daniel A Belkin, Hana Jeon, Elliot Weiss, Jeremy A Brauer, Roy G Geronemus
OBJECTIVE: Nevus of Ota represents congenital dermal melanocytosis in a trigeminal distribution, most commonly occurring in Asian individuals and other individuals with skin of color. Evidence suggests early treatment is beneficial. Multiple reports have shown efficacy and safety of Q-switched laser treatment in adults. There is little data on children and in non-Asian skin types. This series was done to demonstrate safe and effective use of Q-switched laser therapy in children of multiple skin types...
November 13, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29111604/a-comparitive-study-with-a-755%C3%A2-nm-picosecond-alexandrite-laser-with-a-diffractive-lens-array-and-a-532%C3%A2-nm-1-064%C3%A2-nm-nd-yag-with-a-holographic-optic
#5
Emil Tanghetti, John Jennings
BACKGROUND AND OBJECTIVES: This study was performed to better understand the cutaneous effects of using a fractional picosecond laser at 755 nm with a diffractive lens array and a picosecond Nd:YAG laser at 532 mn and 1,064 nm with a holographic optic. We characterized the injuries created by these devices on skin clinically and histologically over 24 hours. With this information we modeled the effects of these devices on a cutaneous target. METHODS: Eight patients, representing Fitzpatrick skin types I-VI, were treated on their backs with a picosecond Alexandrite laser with a diffractive lens array, as well as a picosecond Nd:YAG laser at 532 nm and 1,064 nm with a holographic optic...
November 7, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29105794/in-line-optical-fiber-metallic-mirror-reflector-for-monolithic-common-path-optical-coherence-tomography-probes
#6
Kanwarpal Singh, Rohith Reddy, Gargi Sharma, Yogesh Verma, Joseph A Gardecki, Guillermo Tearney
BACKGROUND AND OBJECTIVES: Endoscopic optical coherence tomography probes suffer from various artifacts due to dispersion imbalance and polarization mismatch between reference and sample arm light. Such artifacts can be minimized using a common path approach. In this work, we demonstrate a miniaturized common path probe for optical coherence tomography using an inline fiber mirror. MATERIALS AND METHODS: A common path optical fiber probe suitable for performing high-resolution endoscopic optical coherence tomography imaging was developed...
November 6, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29095531/low-level-red-led-light-inhibits-hyperkeratinization-and-inflammation-induced-by-unsaturated-fatty-acid-in-an-in-vitro-model-mimicking-acne
#7
Wen-Hwa Li, Ali Fassih, Curt Binner, Ramine Parsa, Michael D Southall
BACKGROUND AND OBJECTIVE: Acne vulgaris is a chronic inflammatory disease of the pilosebaceous units (PSU), associated with increased sebum production, abnormal follicular keratinization (hyperkeratinization), follicular overgrowth of Propionibacterium acnes (P. acnes), and increased inflammatory mediator release. Light therapy has attracted medical interests as a safe alternative treatment for acne. Both blue and red light therapies at high doses >10 J/cm(2) have demonstrated marked effects on inflammatory acne lesions...
November 2, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29095508/laser-assisted-fixation-of-a-nitinol-stapes-prosthesis
#8
Florian Schrötzlmair, Fabian Suchan, Thomas Pongratz, Eike Krause, Joachim Müller, Ronald Sroka
BACKGROUND AND OBJECTIVE: Otosclerosis is an inner ear bone disease characterized by fixation of the stapes and consequently progressive hearing loss. One treatment option is the surgical replacement of the stapes by a prosthesis. When so called "smart materials" like nitinol are used, prosthesis fixation can be performed using a laser without manual crimping on the incus. However, specific laser-prosthesis interactions have not been described yet. The aim of the present study was to elucidate the thermo-mechanical properties of the NiTiBOND® prosthesis as a basis for handling instructions for laser-assisted prosthesis fixation...
November 2, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29095506/subacute-effects-of-rose-bengal-green-light-cross-linking-on-rabbit-thin-corneal-stability-and-safety
#9
Ti Wang, Lu Zhu, Jingyin Zhu, Yinbo Peng, Nianci Shen, Yan Yu, Min Yao
BACKGROUND AND PURPOSE: The purpose of this study was to investigate the subacute effects of Rose Bengal (RB) and 532 nm green light-induced photochemical crosslinking (RB-PCL) on rabbit thin corneal stability and safety in vivo. MATERIALS AND METHODS: Rabbit thin corneal models with 250 μm thickness were created by photorefractive keratectomy surgery. Photochemical crosslinking with green light (wavelength 532 nm) at an illumination intensity of 0.4 W/cm(2) for 250 s (100 J/cm(2) ) was performed, followed by antibiotic treatment and slit lamp monitoring for four weeks...
November 2, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29095505/diagnostic-validity-of-icdas-ii-vistaproof-and-a-combination-of-these-two-methods-an-in-vitro-study-in-pre-cavitated-lesions
#10
José Enrique Iranzo-Cortés, María Almarche-Tarazona, José María Montiel-Company, José Manuel Almerich-Silla
PURPOSE: In view of the present fall in advanced cavitation lesion prevalence, diagnostic methods have been developed to assist in assessing and measuring pre-cavitation lesions. The purpose of this study was to assess the VistaProof fluorescence-based system in vitro and compare the results with those of visual examination using the ICDAS II criteria. METHODS: 100 permanent teeth were collected and 65 were chosen at random for this study. Two separate examiners each examined them twice, 3 weeks apart, assessing them in accordance with ICDAS II...
November 2, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29058788/significant-skin-tightening-by-closure-of-fractional-ablative-laser-holes
#11
Elisabeth Russe, Martin Purschke, Wikunda Limpiangkanan, William A Farinelli, Ying Wang, Apostolos G Doukas, Fernanda H Sakamoto, Gottfried Wechselberger, Richard Rox Anderson
BACKGROUND AND OBJECTIVE: Ablative fractional laser treatment uses thousands of very small laser beam wounds to damage a fraction of the skin, which stimulates tissue remodeling. Each open micro-wound heals without scarring, but the amount of skin tightening achieved is limited. This animal study was performed to test the hypothesis that immediate temporary closure of fractional laser wounds could increase skin tightening after fractional ablative laser treatment. MATERIALS AND METHODS: Four adult swine were used for the study; 98 square test sites (3 × 3 cm) were tattooed on the abdomen and flanks of each pig...
October 23, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29041994/hospital-surge-capacity-a-web-based-simulation-tool-for-emergency-planners
#12
Matthew F Toerper, Gabor D Kelen, Lauren M Sauer, Jamil D Bayram, Christina Catlett, Scott Levin
The National Center for the Study of Preparedness and Catastrophic Event Response (PACER) has created a publicly available simulation tool called Surge (accessible at http://www.pacerapps.org) to estimate surge capacity for user-defined hospitals. Based on user input, a Monte Carlo simulation algorithm forecasts available hospital bed capacity over a 7-day period and iteratively assesses the ability to accommodate disaster patients. Currently, the tool can simulate bed capacity for acute mass casualty events (such as explosions) only and does not specifically simulate staff and supply inventory...
October 18, 2017: Disaster Medicine and Public Health Preparedness
https://www.readbyqxmd.com/read/29023876/mri-assessment-of-treatment-delivery-for-interstitial-photodynamic-therapy-of-high-grade-glioma-in-a-preclinical-model
#13
Henri-Arthur Leroy, Maximilien Vermandel, Bertrand Leroux, Alain Duhamel, Jean-Paul Lejeune, Serge Mordon, Nicolas Reyns
BACKGROUND: High-grade gliomas are primary brain tumors that have shown increasing incidence and unfavorable outcomes. Local control is crucial to the management of this pathology. Photodynamic therapy (PDT), based on the light-induced activation of a photosensitizer (PS), achieves local treatment by inducing selective lesions in tumor tissue. OBJECTIVES: Previous studies have reported the outcomes of PDT for glioblastoma via immunohistological data. Our study aimed to evaluate MRI findings, including diffusion, and perfusion sequences, compared with immunohistological data from the same population to address the efficiency of light fractionation...
October 11, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28990682/ex-vivo-feasibility-study-of-endoscopic-intraductal-laser-ablation-of-the-breast
#14
Tjeerd de Boorder, Laurien Waaijer, Paul J van Diest, Arjen J Witkamp
OBJECTIVE: To determine the feasibility and safety of breast endoscopic thulium laser ablation for treatment of intraductal neoplasia. STUDY DESIGN: Ductoscopy is a minimally invasive endoscopic approach of the milk ducts of the breast via the nipple. Besides diagnosis in women with pathologic nipple discharge (PND), it allows non-invasive removal of intraductal lesions with a stalk like papillomas. Removal, however, is often incomplete and flat lesions cannot be targeted...
October 9, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28990678/spatiotemporal-modeling-of-laser-tissue-soldering-using-photothermal-nanocomposites
#15
Madaline Mushaben, Russell Urie, Tanner Flake, Michael Jaffe, Kaushal Rege, Jeffrey Heys
OBJECTIVE: Laser tissue soldering using photothermal solders is a technology that facilitates rapid sealing using heat-induced changes in the tissue and the solder material. The solder material is made of gold nanorods embedded in a protein matrix patch that can be placed over the tissue rupture site and heated with a laser. Although laser tissue soldering is an attractive approach for surgical repair, potential photothermal damage can limit the success of this approach. Development of predictive mathematical models of photothermal effects including cell death, can lead to more efficient approaches in laser-based tissue repair...
October 9, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28986994/microvasculature-dropout-detected-by-the-optical-coherence-tomography-angiography-in-nonarteritic-anterior-ischemic-optic-neuropathy
#16
Yi Song, Jing-Yu Min, Lei Mao, Yuan-Yuan Gong
OBJECTIVE: To investigate microcirculation characteristics of peripapillary superficial retina and optic disc in eyes with nonarteritic anterior ischemic optic neuropathy (NAION) using optical coherence tomography angiography (OCTA). METHODS: Forty-one eyes of 30 NAION patients and 30 eyes of 30 normal subjects were evaluated with OCTA (AngioVue, Optovue). The whole vessel density, inside disc vessel density, peripapillary vessel density, and vessel densities based on the sectorial division in the nerve head mode peripapillary superficial retina and RPC mode optic disc were measured respectively...
October 7, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28976011/oncologic-results-and-quality-of-life-in-patients-with-squamous-cell-carcinoma-of-hypopharynx-after-transoral-laser-microsurgery
#17
Li-Ting Hung, Hsin-I Huang, Ling-Wei Wang, Muh-Hwa Yang, Pen-Yuan Chu
OBJECTIVE: Transoral laser microsurgery (TLM) is an alternative method for organ preservation in squamous cell carcinoma of hypopharynx (HPSCC). The purpose of this study was to analyze the oncologic results and quality of life (QOL) in HPSCC patients after TLM. METHODS: Forty-six patients who underwent TLM were included, 34 of them had QOL evaluations. The QOL analyses were measured with EORTC QLQ-C-30, QLQ-H&N35, VHI-30, and MDADI at least 6 months postoperatively...
October 4, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28960395/treatment-of-acne-scarring-with-a-novel-fractionated-dual-wavelength-picosecond-domain-laser-incorporating-a-novel-holographic-beam-splitter
#18
Eric F Bernstein, Kevin T Schomacker, Lisa D Basilavecchio, Jessica M Plugis, Jayant D Bhawalkar
BACKGROUND AND OBJECTIVES: Fractional treatment with a dual wavelength 1,064 and 532 nm picosecond-domain laser, delivering a 10 × 10 array of highly focused beamlets via a holographic optic, was investigated for the treatment of acne scars. STUDY: Twenty-seven of 31 subjects completed the study, 19 were treated using 1,064 nm and 8 were treated at 532 nm, all having four-monthly treatments. Blinded evaluation of digital images by three physician evaluators comparing pre- and 3-month post-treatment images measured efficacy using a 10-point scale...
November 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28944964/wnt-%C3%AE-catenin-and-erk-pathway-activation-a-possible-mechanism-of-photobiomodulation-therapy-with-light-emitting-diodes-that-regulate-the-proliferation-of-human-outer-root-sheath-cells
#19
Jung E Kim, Young J Woo, Ki M Sohn, Kwan H Jeong, Hoon Kang
BACKGROUND: Outer root sheath cells (ORSCs) play important roles in maintaining hair follicle structure and provide support for the bulge area. The hair growth promoting effects of photobiomodulation therapy (PBMT) have been reported, but the mechanisms for this in human ORCs (hORSCs) have rarely been studied. OBJECTIVE: The aim of this study was to investigate the effect of various wavelengths of light-emitting diode (LED) irradiation on human ORSCs (hORSCs). METHODS: LED irradiation effects on hORSC proliferation and migration were examined with MTT assay, BrdU incorporation assay and migration assays...
September 25, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28940535/experimental-and-numerical-assessment-of-hyperthermic-laser-lipolysis-with-1-064%C3%A2-nm-nd-yag-laser-on-a-porcine-fatty-tissue-model
#20
Matija Milanic, Blaz Tasic Muc, Matija Jezersek, Matjaz Lukac
BACKGROUND AND OBJECTIVES: The aim of this study was to develop experimental and numerical models for a better understanding of hyperthermic laser lipolysis (HHL). STUDY DESIGN: A 3 cm thick porcine fat sample was irradiated over a 4.3 × 4.7 cm(2) area for 2 minutes with a 1,064 nm Nd:YAG laser using 1.2 W/cm(2) irradiance. Two irradiation scenarios were considered: without and with forced air cooling. Following the irradiation, the sample was left to cool down by natural convection...
September 20, 2017: Lasers in Surgery and Medicine
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