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https://www.readbyqxmd.com/read/28932339/penetrating-keratoplasty-for-keratoconus-excimer-versus-femtosecond-laser-trephination
#1
Berthold Seitz, Achim Langenbucher, Tobias Hager, Edgar Janunts, Moatasem El-Husseiny, Nora Szentmáry
BACKGROUND: In case of keratoconus, rigid gas-permeable contact lenses as the correction method of first choice allow for a good visual acuity for quite some time. In a severe stage of the disease with major cone-shaped protrusion of the cornea, even specially designed keratoconus contact lenses are no more tolerated. In case of existing contraindications for intrastromal ring segments, corneal transplantation typically has a very good prognosis. METHODS: In case of advanced keratoconus - especially after corneal hydrops due to rupture of Descemet's membrane - penetrating keratoplasty (PKP) still is the surgical method of first choice...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/28919909/photorefractive-keratectomy-in-the-management-of-postradial-keratotomy-hyperopia-and-astigmatism
#2
Mohammad Ghoreishi, Mohammad-Ali Abtahi, Iman Seyedzadeh, Hamid Fesharaki, Mohadeseh Mohammadnia, Hamidreza Jahanbani-Ardakani, Seyed-Hossein Abtahi
BACKGROUND: The aim of this study is to evaluate the results of photorefractive keratectomy (PRK) in the management of postoperative hyperopia and astigmatism in patients with history of radial keratotomy (RK). MATERIALS AND METHODS: This prospective nonrandomized noncomparative interventional case series enrolled consecutive eyes treated with PRK after RK. In cases, in which (1) wavefront (WF) scan was undetectable during primary examinations; and/or, (2) WF data were not transferable to the excimer laser device, patients were treated with the tissue-saving (TS) mode...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28918305/single-center-experience-with-percutaneous-extraction-of-cardiac-implantable-electric-devices
#3
Ayako Okada, Morio Shoda, Hiroaki Tabata, Wataru Shoin, Hideki Kobayashi, Takahiro Okano, Koji Yoshie, Yasutaka Oguchi, Takahiro Takeuchi, Ken Kato, Koichiro Kuwahara
BACKGROUND: The estimated incidence of infected cardiac implantable electric devices (CIED) has recently increased to 1-2% in Japan. Extraction of long-term implanted devices is generally difficult. There are few reports about lead extraction in Japan. We describe our experience with and outcomes of lead extraction using excimer lasers, mechanical sheaths, and manual extraction. METHODS: We retrospectively analyzed the characteristics, types of devices, and indications for extraction in 29 patients with 67 leads who required CIED lead extraction at Shinshu University Hospital between April 2014 and October 2016...
September 13, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28913504/a-review-and-meta-analysis-of-corneal-cross-linking-for-post-laser-vision-correction-ectasia
#4
REVIEW
Qi Wan, Dan Wang, HongQuan Ye, Jing Tang, Yu Han
PURPOSE: The aim of this study was to review the safety and stability of cornea cross-linking (CXL) for the treatment of keratectasia after Excimer Laser Refractive Surgery. METHODS: Eligible studies were identified by systematically searching PubMed, Embase, Web of Science and reference lists. Meta-analysis was performed using Stata 12.1 software. The primary outcome parameters included the changes of corrected distant visual acuity (CDVA), uncorrected visual acuity (UCVA), the maximum keratometry value (Kmax) and minimum keratometry value (Kmin), the surface regularity index (SRI), the surface asymmetry index (SAI), the keratoconus prediction index (KPI), corneal thickness, and endothelial cell count...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28884710/atmospheric-pulsed-laser-deposition-and-thermal-annealing-of-plasmonic-silver-nanoparticle-films
#5
Taj M Khan, Mubarak M Mujawar, Katarzyna E Siewerska, Anuj Pokle, Tony Donnelly, Niall McEvoy, Georg S Duesberg, James G Lunney
A new method for pulsed laser deposition of plasmonic silver nanoparticle films in flowing gas at atmospheric pressure is described. The ablation was done using an excimer laser at 248 nm. Fast optical imaging shows that the ablation plume is captured by the flowing gas, and is expected to form a nanoparticle aerosol, which is carried 5 - 20 mm to the substrate. The dependence of the deposition rate on laser fluence, gas flow velocity, and target-substrate distance was investigated using electron microscopy and absorption spectroscopy of the deposited films...
September 8, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28860701/accuracy-of-alcon-wavelight-%C3%A2-ex500-optical-pachymetry-during-lasik
#6
Mark D Mifflin, Xavier M Mortensen, Brent S Betts, Cole Gross, Brian Zaugg
PURPOSE: To study the accuracy and reliability of optical pachymetry using the Alcon WaveLight EX500 during laser-assisted in situ keratomileusis (LASIK). MATERIALS AND METHODS: This was a retrospective chart review of 90 eyes from 45 patients who had undergone LASIK (mean age 35.2±8.2 years; 19 males, 26 females). The WaveLight FS200 femtosecond laser was programmed to cut LASIK flaps at a desired depth of 120 μm. Optical low-coherence reflectometry (WaveLight EX500) was used to measure central corneal thickness prior to lifting the flap, and the residual stromal bed immediately after excimer ablation...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28857313/perceptions-of-u-s-dermatology-residency-program-directors-regarding-the-adequacy-of-phototherapy-training-during-residency
#7
Kavita Goyal, Michael O Nguyen, Rachel V Reynolds, Arash Mostaghimi, Cara Joyce, Jeffrey M Cohen, Elizabeth A Buzney
BACKGROUND/PURPOSE: Phototherapy utilization has declined over the last 20 years despite its efficacy and cost-effectiveness. Adequacy of phototherapy training in residency may be a contributing factor. The purpose of this study was to evaluate perceptions of U.S. dermatology residency program directors (PDs) regarding the effectiveness of their programs' phototherapy training and what constitutes adequate phototherapy education. METHODS: A questionnaire was sent to PDs to assess phototherapy training within their program; aspects such as dedicated time, exposure to different modalities, and barriers to resident education were surveyed...
August 30, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/28837041/laser-processing-of-protein-films-as-a-method-for-accomplishment-of-cell-patterning-at-the-microscale
#8
Ariadne Prigipaki, Katerina Papanikolopoulou, Estelle Mossou, Edward P Mitchell, V Trevor Forsyth, Alexandros Selimis, Anthi Ranella, Anna Mitraki
In this study, we propose a photostructuring approach for protein films based on a treatment with nanosecond pulses of a KrF excimer laser. As a model protein we used an amyloid fibril-forming protein. Laser treatment induced a foaming of the sample surface exhibiting an interconnected fibrous mesh with a high degree of control and precision. The surface foaming was well characterized by scanning electron microscopy, atomic force microscopy, laser induced fluorescence and contact angle measurements. The laser irradiated areas of the protein films acquired new morphological and physicochemical properties that could be exploited to fulfill unmet challenges in the tissue engineering field...
September 7, 2017: Biofabrication
https://www.readbyqxmd.com/read/28833900/treatment-of-oral-lichen-planus-using-308-nm-excimer-laser
#9
Wei-Bing Liu, Li-Wei Sun, Hua Yang, Yan-Fei Wang
Oral lichen planus (OLP) is a chronic inflammatory disease, has prolonged courses, repeated attacks and resistance to treatment. The traditional narrow spectrum UVB treatment has an established efficacy on skin lichen planus, and high safety. However, most of ultraviolet phototherapy devices have a huge volume, thereby cannot be used in the treatment of OLP. Lymphocytic infiltration is evident in the lesions of lichen planus, and the direct irradiation of 308-nm excimer laser can induce apoptosis of the T lymphocytes in skin lesions, thereby has a unique therapeutic effect on the diseases involving T lymphocytes...
August 23, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/28812164/efficacy-of-fractional-lasers-in-treating-alopecia-a-literature-review
#10
Marina Perper, Adam S Aldahan, Rachel A Fayne, Christopher P Emerson, Keyvan Nouri
Hair loss stemming from different types of alopecia, such as androgenic alopecia and alopecia areata, negatively affects over half the population and, in many circumstances, causes serious psychosocial distress. Current treatment options for alopecia, such as minoxidil, anthralin, and intralesional corticosteroids, vary efficacy and side effect profiles. It is known that low-level laser/light therapies (LLLT), or photobiomodulations, such as the US FDA-cleared HairMax Lasercomb®, He-Ne laser, and excimer laser, are relatively affordable, user-friendly, safe, and effective forms of treatment for hair loss...
August 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28809991/treatment-of-inverse-intertriginous-psoriasis-updated-guidelines-from-the-medical-board-of-the-national-psoriasis-foundation
#11
Hasan Khosravi, Michael P Siegel, Abby S Van Voorhees, Joseph F Merola
<p>Inverse or intertriginous psoriasis commonly involves skin fold areas including the axillae, perianal skin, intergluteal cleft, inframammary, genital/inguinal, abdominal, and retroauricular folds. After reviewing the literature for new treatments, a task force was convened to update a consensus on inverse psoriasis therapy. Short-term treatment continues to be low-potency topical steroids. In order to avoid steroid-induced adverse effects, long-term therapy includes topical immunomodulators, calcitriol, and calcipotriene...
August 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28808774/-refractive-lenticule-extraction-the-relex-smile-technique-video-article
#12
REVIEW
M Blum, W Sekundo
Refractive lenticule extraction (ReLEx/SMILE) is a refractive surgical method developed by the authors in stages primarily for correction of myopia and myopic astigmatism, in which a femtosecond laser is exclusively used. In the (ReLEx/SMILE) method a refractive lenticule is generated by the femtosecond laser, which is subsequently extracted through a small incision. Opening of the corneal surface with a flap and use of an excimer laser is no longer necessary. In 2013 the method was newly assessed and classified by the Joint Commisssion for Refractive Surgery (KRC) of the Professional Association of Ophthalmologists (BVA) and the German Ophthalmological Society (DOG)...
August 14, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28799958/learning-curve-of-small-incision-lenticule-extraction-challenges-and-complications
#13
Jeewan S Titiyal, Manpreet Kaur, Anubha Rathi, Ruchita Falera, Manthan Chaniyara, Namrata Sharma
PURPOSE: To describe the intraoperative complications observed during the initial learning curve of small incision lenticule extraction (SMILE) and their management. METHODS: Prospective evaluation of 100 consecutive eyes (50 patients) undergoing SMILE was performed at an apex tertiary care ophthalmic center. Patients older than 18 years with a stable refractive error ranging from -1.0 to -10.0 D myopia and up to 3.0 D astigmatism were included. Any intraoperative complications and their management were noted...
August 9, 2017: Cornea
https://www.readbyqxmd.com/read/28791058/stereoacuity-after-wavefront-guided-photorefractive-keratectomy-in-anisometropia
#14
Farid Karimian, Vahid Ownagh, Mohammad Aghazadeh Amiri, Seyed Mehdi Tabatabaee, Nooshin Dadbin
PURPOSE: To determine changes in stereoacuity in anisometropic myopic eyes after photorefractive keratectomy (PRK). METHODS: Myopic patients with at least 1 diopter (D) of anisometropia in sphere, astigmatism, or spherical equivalent who were referred to our hospital for excimer refractive surgery were enrolled as a prospective sequential interventional case series. All patients underwent wavefront-guided photorefractive keratectomy (WFG-PRK) using the Technolas Perfect Vision (217z) Excimer laser machine...
July 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28761302/reactivation-of-herpes-simplex-virus-secondary-to-excimer-laser-treatment-in-a-patient-with-vitiligo
#15
Yu Seok Jung, Ji Hae Lee, Gyong Moon Kim, Jung Min Bae
No abstract text is available yet for this article.
August 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28753998/aptamer-based-carboxyl-terminated-nanocrystalline-diamond-sensing-arrays-for-adenosine-triphosphate-detection
#16
Evi Suaebah, Takuro Naramura, Miho Myodo, Masataka Hasegawa, Shuichi Shoji, Jorge J Buendia, Hiroshi Kawarada
Here, we propose simple diamond functionalization by carboxyl termination for adenosine triphosphate (ATP) detection by an aptamer. The high-sensitivity label-free aptamer sensor for ATP detection was fabricated on nanocrystalline diamond (NCD). Carboxyl termination of the NCD surface by vacuum ultraviolet excimer laser and fluorine termination of the background region as a passivated layer were investigated by X-ray photoelectron spectroscopy. Single strand DNA (amide modification) was used as the supporting biomolecule to immobilize into the diamond surface via carboxyl termination and become a double strand with aptamer...
July 21, 2017: Sensors
https://www.readbyqxmd.com/read/28742618/changes-in-higher-order-aberrations-after-phototherapeutic-keratectomy-for-subepithelial-corneal-infiltrates-after-epidemic-keratoconjunctivitis
#17
Burcin Kepez Yildiz, Semih Urvasizoglu, Yusuf Yildirim, Alper Agca, Nilay K Besek, Korhan Fazil, Erdem Eris, Ebru Demet Aygit, Muhittin Taskapili, Ahmet Demirok
PURPOSE: To investigate how corneal aberrations change after phototherapeutic keratectomy (PTK) for subepithelial infiltrates after adenoviral keratoconjunctivitis. METHODS: The records of patients who underwent transepithelial PTK for subepithelial infiltrates were retrospectively reviewed. Preoperative best-corrected visual acuity (VA) and the results of slit-lamp biomicroscopy examinations were recorded. The PTK procedure was performed under topical anesthesia with an Amaris excimer laser...
October 2017: Cornea
https://www.readbyqxmd.com/read/28741163/-visual-improvement-by-aberration-free-excimer-laser-retreatment-therapy-after-combined-photorefractive-keratectomy-and-keratome-laser-in-situ-keratomileusis-treatment
#18
M Böhm, C Gruber, E Hemkeppler, T Kohnen
A 23-year-old male patient presented with reduced visual acuity of the right eye, along with halos and starbursts in both eyes after a one-stage tissue-saving treatment, a combination of myopic photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK). After an extensive preliminary examination and analysis of the examination results, aberration-free LASIK retreatment for reducing astigmatism and enlargement of the optical zone with an excimer laser was performed on the right eye. The visual performance and the subjectively perceived optical quality improved postoperatively...
July 24, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28718904/autologous-serum-eye-drops-and-enhanced-epithelial-healing-time-after-photorefractive-keratectomy
#19
Hanife Tuba Akcam, Metin Unlu, Emine Esra Karaca, Hulya Yazici, Bahri Aydin, Ahmet Murad Hondur
BACKGROUND: The aim of the study is to test whether use of autologous serum eye-drops can provide earlier epithelial healing following the application of photorefractive keratectomy. METHOD: Sixty patients (60 eyes) underwent photorefractive keratectomy for myopia. Thirty eyes received autologous serum drops (Study group) while 30 eyes received conventional artificial tears (Control group) after photorefractive keratectomy. An 8 mm epithelial opening was prepared with the application of 18 per cent alcohol for 20 seconds...
July 18, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28709036/hydroxyapatite-and-bioactive-glass-surfaces-for-fiber-reinforced-composite-implants-via-surface-ablation-by-excimer-laser
#20
Julia Kulkova, Niko Moritz, Hannu Huhtinen, Riina Mattila, Ivan Donati, Eleonora Marsich, Sergio Paoletti, Pekka K Vallittu
In skeletal reconstructions, composites, such as bisphenol-A-glycidyldimethacrylate resin reinforced with glass fibers, are potentially useful alternatives to metallic implants. Recently, we reported a novel method to prepare bioactive surfaces for these composites. Surface etching by Excimer laser was used to expose bioactive glass granules embedded in the resin. The purpose of this study was to analyze two types of bioactive surfaces created by this technique. The surfaces contained bioactive glass and hydroxyapatite granules...
July 4, 2017: Journal of the Mechanical Behavior of Biomedical Materials
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