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Excimer laser

Judit Karacsonyi, Ehrin J Armstrong, Huu Tam D Truong, Ryan Tsuda, Damianos G Kokkinidis, Jose Roberto Martinez-Parachini, Aya J Alame, Barbara A Danek, Aris Karatasakis, Michele Roesle, Houman Khalili, Imre Ungi, Subhash Banerjee, Emmanouil S Brilakis, Bavana V Rangan
BACKGROUND: The contemporary use and outcomes of excimer laser coronary atherectomy (ELCA) in percutaneous coronary intervention (PCI) are not well described. METHODS: We examined the baseline clinical and angiographic characteristics and procedural outcomes of 130 target lesions in 121 consecutive PCIs (n = 116 patients) in which ELCA was performed at three United States Department of Veterans Affairs (VA) medical centers between 2008 and 2016. RESULTS: Mean age was 68...
March 15, 2018: Journal of Invasive Cardiology
Abdullah Almasoud, Daniel Walters, Ehtisham Mahmud
The feasibility, safety, and high technical success of robotically assisted percutaneous coronary intervention (PCI) for the treatment of both simple and complex coronary disease has been demonstrated. As the current generation robotic platform is limited to a rapid exchange system, orbital or rotational atherectomy cannot be performed robotically. However, excimer laser coronary atherectomy is performed with a rapid exchange catheter but its feasibility during robotically assisted PCI is unknown. We report the successful use of laser atherectomy during two complex robotically assisted PCI procedures using the CorPath GRX robotic system...
March 9, 2018: Catheterization and Cardiovascular Interventions
Marie-Sophie Hanet, Annette Zimpfer, Sabine Lepper, Berthold Seitz
BACKGROUND: The purpose of this report was to describe a single case of recurrent interstitial keratitis in a young patient leading to keratoconus-like corneal changes. RESULTS: Over the 2 years follow-up, the patient developed clinical signs of keratoconus with Vogt's striae, Fleischer Ring and paracentral stromal thinning in the affected eye only. The tomographic measurements revealed a rapid reduction of corneal thickness from 581 to 303 μm and an irregular steepening of the pathological cornea...
March 7, 2018: Journal of Ophthalmic Inflammation and Infection
Sara Magdi, Joumana El-Rifai, Mohamed A Swillam
We report the fabrication of an array of random Silicon nanocones using a KrF excimer laser. A 370 nm thick amorphous Silicon layer deposited on a glass substrate was used in the process. The fabricated nanocones showed a large and broadband absorption enhancement over the entire visible wavelength range. An enhancement up to 350% is measured at λ = 650 nm. Additionally, the laser irradiation caused the nanocones to crystallize. The effect of changing the laser parameters (i.e. energy density, time, and frequency) on the morphology and the absorption is studied and compared...
March 5, 2018: Scientific Reports
Yu Zhang, Yue-Guo Chen
BACKGROUND: To compare the incidence of rainbow glare (RG) after femtosecond laser assisted-LASIK (FS-LASIK) using the upgraded FS200 femtosecond laser with different flap cut parameter settings. METHODS: A consecutive series of 129 patients (255 eyes) who underwent FS-LASIK for correcting myopia and/or astigmatism using upgraded WaveLight FS200 femtosecond laser with the original settings was included in group A. Another consecutive series of 129 patients (255 eyes) who underwent FS-LASIK using upgraded WaveLight FS200 femtosecond laser with flap cut parameter settings changed (decreased pulse energy, spot and line separation) was included in group B...
March 5, 2018: BMC Ophthalmology
Marcel Heeger, Bonnie J Tyler, Martin Körsgen, Heinrich F Arlinghaus
In this study, the influence of two different cluster primary ions in laser secondary neutral mass spectrometry (Laser-SNMS) has been investigated. Despite the many advantages of Laser-SNMS, fragmentation of neutral organic molecules during both sputtering and photoionization has limited its efficiency for the study of large organic and biological molecules. Cluster ion sputtering, and in particular large argon gas cluster sputtering, has been proposed as a means of reducing this fragmentation. Molecules of 9-fluorenylmethoxycarbonyl-pentafluoro-l-phenylalanine were sputtered using Bi3 + and Ar2000 + cluster primary ions, and the desorbed neutral species ("secondary neutrals") were postionized using a 7...
March 2, 2018: Biointerphases
Ayako Harima, Akinori Sairaku, Ichiro Inoue, Kenji Nishioka, Toshiharu Oka, Yasuharu Nakama, Kazuoki Dai, Kuniomi Ohi, Haruki Hashimoto, Yasuki Kihara
OBJECTIVES: We aimed to test a novel stent-less revascularization strategy using a combination of excimer laser coronary angioplasty (ELCA) and drug-coated balloon (DCB) for patients with acute coronary syndrome (ACS). BACKGROUND: Percutaneous coronary intervention with drug eluting stents is a standard invasive treatment for ACS. Some unsolved issues however remain, such as stent thrombosis and bleeding risks associated with dual antiplatelet therapy. METHODS: Consecutive ACS patients were planned to receive either a DCB application following ELCA without a stent implantation or conventional revascularization with a coronary stent...
February 20, 2018: Journal of Interventional Cardiology
Atulya Prasad, Katarzyna M Sawicka, Kelly B Pablo, Lauren K Macri, Jerome Felsenstein, James J Wynne, Richard A F Clark
INTRODUCTION: Recent evidence indicates that early removal of eschar by tangential debridement can promote healing. Laser debridement can be used for debridement of areas that prove challenging for debridement using tangential excision. In particular, irradiation with an ArF excimer laser ablates desiccated eschar and is self-terminating, preserving hydrated or viable tissue. METHODS: Thermal burns were created on the flanks of two outbred, female Yorkshire pigs using aluminum bars heated to 70°C and applied for different lengths of time...
February 15, 2018: Burns: Journal of the International Society for Burn Injuries
Sagar Rambhia, Matthew Janko, Robert I Hacker
Central venous occlusion is conventionally managed with balloon angioplasty, stent extension or sharp recanalization. Here we describe recanalization of a chronically occluded innominate vein using excimer laser after conventional techniques were unsuccessful. Patient clinical improvement and fistula patency have been sustained two years post-intervention. This technique may provide new hemodialysis access options for patients who would not otherwise be candidates for hemodialysis access on the ipsilateral side of a central venous occlusion...
February 15, 2018: Annals of Vascular Surgery
Chien-Hung Wu, Kow-Ming Chang, Yi-Ming Chen, Bo-Wen Huang, Yu-Xin Zhang, Shui-Jinn Wang
Atmospheric pressure plasma-enhanced chemical vapor deposition (AP-PECVD) technique and KrF excimer laser annealing (ELA) were employed for the fabrication of indium gallium zinc oxide thin-film transistors (IGZO-TFTs). Device with a 150 mJ/cm2 laser annealing densities demonstrated excellent electrical characteristics with improved on/off current ratio of 4.7×107, high channel mobility of 10 cm2/V-s, and low subthreshold swing of 0.15 V/dec. The improvements are attributed to the adjustment of oxygen vacancies in the IGZO channel to an appropriate range of around 28...
March 1, 2018: Journal of Nanoscience and Nanotechnology
Alena Semerádtová, Marcel Štofik, Oldřich Neděla, Ondřej Staněk, Petr Slepička, Zdeňka Kolská, Jan Malý
Herein, we report a novel concept of low-cost flexible platform for fluorescence-based biosensor. The surface of polyethylene naphthalate (PEN) foil was exposed to KrF excimer laser through a photolitographic contact mask. Laser initiated surface modification resulted in micro-patterned areas with surface functional groups available for localized covalent immobilization of biotin. High affinity binding protein (albumin-binding domain (ABD) of protein G, Streptococcus G148) recognizing human serum albumin (HSA), genetically fused with streptavidin (SA-ABDwt), was immobilized on the micro-patterned surface through biotin-streptavidin coupling...
February 2, 2018: Colloids and Surfaces. B, Biointerfaces
F J Zhang, M S Sun
With the development of excimer laser and femtosecond laser equipment, application of diversified and customized surgical decision in modern corneal refractive surgery has been an inevitable trend. However, how to make a personalized decision with an accurate surgical design to achieve better visual quality becomes the main focus in clinical applications. Small-incision lenticule extraction (SMILE) and femtosecond assisted laser in situ keratomileusis (FS-LASIK) have been commonly acknowledged as the mainstream of corneal refractive surgery for ametropia correction nowadays...
January 11, 2018: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
Dan Z Reinstein, Timothy J Archer, Glenn I Carp, Alastair J Stuart, Elizabeth L Rowe, Andrew Nesbit, Tara Moore
PURPOSE: To report the incidence, visual and refractive outcomes, optical zone enlargement, and recentration using topography-guided CRS-Master TOSCA II software with the MEL 80 excimer laser (Carl Zeiss Meditec AG, Jena, Germany) after primary myopic laser refractive surgery. METHODS: Retrospective analysis of 73 eyes (40 patients) with complaints of night vision disturbances due to either a decentration or small optical zone following a primary myopic laser refractive surgery procedure using the MEL 80 laser...
February 1, 2018: Journal of Refractive Surgery
Paolo Vinciguerra, Fabrizio I Camesasca, Emanuela Morenghi, Claudio Azzolini, Luca Pagano, Silvia Trazza, Riccardo Vinciguerra
PURPOSE: To evaluate long-term results of sequential customized therapeutic keratectomy (SCTK) in highly aberrated corneas with apical scars consequent to hyperopic excimer laser refractive surgery. METHODS: Fifteen eyes of 12 patients treated with SCTK for a corneal apical scar after hyperopic excimer laser refractive surgery were retrospectively evaluated. SCTK is a sequence of custom therapeutic excimer laser keratectomies where the results are monitored step-by-step by intraoperative corneal topography...
February 1, 2018: Journal of Refractive Surgery
S Ayob, S E Cockayne, D J Gawkrodger
Vitiligo is an acquired disorder of depigmentation resulting from the loss of functional epidermal melanocytes. It has a worldwide prevalence of 0.5-2%. Vitiligo can have a major negative impact on patients' quality of life.Current treatments include topical corticosteroids and immunomodulators, systemic immunosuppressants, cosmetic camouflage, ultraviolet radiation and surgical procedures, e.g. punch grafting. Recently, targeted phototherapy using the 308-nm xenon-chloride (XeCl) monochromatic excimer light (MEL) delivered by a laser or a lamp emitting non-coherent monochromatic light has been used...
February 8, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
Min-Young Yang, Hyunju Jin, Hyang-Suk You, Woo-Haing Shim, Jeong-Min Kim, Gun-Wook Kim, Hoon-Soo Kim, Hyun-Chang Ko, Byung-Soo Kim, Moon-Bum Kim
No abstract text is available yet for this article.
February 2018: Annals of Dermatology
Jong Ho Ahn, Dong Hyun Kim, Kyung Hwan Shyn
PURPOSE: To evaluate changes in clinical practice in the field of refractive surgery in Korea over the past 10 years. METHODS: A survey consisting of 59 multiple-choice questions regarding the preferred types of refractive surgery, excimer laser machine, and presbyopia surgery was mailed to 742 members of the Korean Society of Cataract and Refractive Surgery in January 2016, and 50 members responded to the survey. These data were compared with the 2005 or 2007 survey results...
January 25, 2018: Korean Journal of Ophthalmology: KJO
Anar Mammadli, Veysel Kutay Vurgun, Onur Yıldırım, Ali Timuçin Altın, Başar Candemir, Ömer Akyürek
With the increasing number of implanted pacemakers and implantable cardioverter defibrillators, removal is required more frequently. Presently described is the transvenous extraction of a 26-year-old Accufix atrial lead using a mechanical dilator sheath. A 50-year-old male patient was admitted to the clinic with a pacemaker pocket infection. The atrial lead was an Accufix Bipolar J-Atrial active fixation lead, a model that was recalled in 1994, after reports of 2 deaths and 2 nonfatal injuries related to protrusion of the J retention wire...
January 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
Avi Wallerstein, Mathieu Gauvin, Eser Adiguzel, Harmanjit Singh, Vasudha Gupta, Mona Harissi-Dagher, Mark Cohen
PURPOSE: To describe the incidence, risk factors, and outcomes before and after irrigation of clinically significant laser in situ keratomileusis (LASIK) flap striae. SETTING: Multisurgeon multicenter standardized protocol practice. DESIGN: Retrospective case-control series. METHODS: Eyes with striae necessitating flap relift and irrigation were identified. Preoperative, intraoperative, and postoperative variables were collected...
December 2017: Journal of Cataract and Refractive Surgery
Juan A Durán, Elisa Gutiérrez, Rebeca Atienza, David P Piñero
PURPOSE: To assess the ocular optical quality results as well as the astigmatic changes after wavefront-guided laser in situ keratomileusis (LASIK) in eyes with myopic astigmatism. SETTING: Instituto Clínico-Quirúrgico Oftalmológico, Bilbao, Vizcaya, Spain. DESIGN: Prospective case series. METHODS: Thirty-three eyes having wavefront-guided LASIK with the Star S4IR excimer laser combined with the iDesign system were enrolled in the study...
December 2017: Journal of Cataract and Refractive Surgery
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