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https://www.readbyqxmd.com/read/29135710/adjustment-of-intrastromal-corneal-ring-segments-after-unsuccessful-implantation-in-keratoconic-eyes
#1
Tiago Monteiro, José Ferreira Mendes, Fernando Faria-Correia, Nuno Franqueira, David Madrid-Costa, José F Alfonso
PURPOSE: To evaluate visual, refractive, and corneal topography outcomes in eyes with keratoconus that have undergone exchange/adjustment surgery with a new intrastromal corneal ring segment (ICRS) combination after unsuccessful visual and/or refractive outcomes after primary ICRS surgery. METHODS: A retrospective nonrandomized case series was conducted including consecutive eyes of patients with keratoconus that underwent ICRS adjustment after an unsuccessful visual outcome...
November 13, 2017: Cornea
https://www.readbyqxmd.com/read/29129843/large-arterial-ring-formed-between-the-m1-and-m2-segments-of-the-right-middle-cerebral-artery-diagnosed-with-mr-angiography
#2
Haruomi Yamaguchi, Akira Uchino, Naoko Saito, Ichiro Deguchi, Masaki Takao
No abstract text is available yet for this article.
November 13, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/29120710/femtosecond-laser-implantation-of%C3%A2-a%C3%A2-340-degree-intrastromal-corneal-ring%C3%A2-segment-in-keratoconus-short-term%C3%A2-outcomes
#3
Mohammad Mehdi Sadoughi, Bahram Einollahi, Amir Reza Veisi, Mohammad Zare, Mohammad Reza Sedaghat, Danial Roshandel, Neda Einollahi, Javad Rezaei
PURPOSE: To evaluate the short-term outcomes of femtosecond laser-assisted implantation of a 340-degree intracorneal ring (ICR) (Keraring) in patients with keratoconus. SETTING: Four centers in Iran. DESIGN: Prospective case series. METHODS: All cases had implantation of the 340-degree ICR after tunnel creation with a femtosecond laser. The uncorrected (UDVA) and corrected (CDVA) distance visual acuities, sphere, cylinder, manifest refraction spherical equivalent (MRSE), mean keratometry (K), steep K, and flat K were evaluated preoperatively and 1, 3, and 6 months postoperatively...
October 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29117421/erratum-for-intracorneal-ring-segments-implantation-for-corneal-ectasia
#4
(no author information available yet)
No abstract text is available yet for this article.
November 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29106900/peripapillary-distribution-of-muller-cells-within-the-retinal-nerve-fiber-layer-in-human-eyes
#5
Shahar Frenkel, Gal Goshen, Lu Leach, Jacob Pe'er, Michael Mimouni, Eytan Z Blumenthal
The purpose of this study was to describe the distribution of Muller cell within the peripapillary retinal nerve fiber layer (RNFL) in human eyes. Eleven unpaired normal postmortem eyes were recruited into this study. Each eye was sectioned using the "umbrella technique" to obtain a concentric peripapillary ring centered on the optic disc, with a diameter of 3.0 mm. Immunohistochemistry with anti- CRALBP stained Muller cell within each ring. The RNFL thickness measurements around the peripapillary ring were: 262...
October 26, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/29090019/molecular-characterization-and-evaluation-of-complex-rearrangements-in-a-case-of-ring-chromosome-15
#6
Stuti Tewari, Naznin Lubna, Raju Shah, Ahmed B H Al-Rikabi, Krati Shah, Jayesh Sheth, Frenny Sheth
BACKGROUND: Ring chromosome 15 is a rare genetic entity. Only a few cases have been reported with characterization using molecular techniques. The clinical presentation is quite variable, as a result of differences in the breakpoints, haploinsufficiency of genes involved in deleted segment/s, level of mosaicism and ring instability resulting in a variability of rearrangement of genetic material. CASE PRESENTATION: The proband, a 2 months old boy, presented with small head size and facial dysmorphism...
2017: Molecular Cytogenetics
https://www.readbyqxmd.com/read/29089568/alzheimer-s-disease-and-cigarette-smoke-components-effects-of-nicotine-pahs-and-cd-ii-cr-iii-pb-ii-pb-iv-ions-on-amyloid-%C3%AE-peptide-aggregation
#7
Cecilia Wallin, Sabrina B Sholts, Nicklas Österlund, Jinghui Luo, Jüri Jarvet, Per M Roos, Leopold Ilag, Astrid Gräslund, Sebastian K T S Wärmländer
Cigarette smoking is a significant risk factor for Alzheimer's disease (AD), which is associated with extracellular brain deposits of amyloid plaques containing aggregated amyloid-β (Aβ) peptides. Aβ aggregation occurs via multiple pathways that can be influenced by various compounds. Here, we used AFM imaging and NMR, fluorescence, and mass spectrometry to monitor in vitro how Aβ aggregation is affected by the cigarette-related compounds nicotine, polycyclic aromatic hydrocarbons (PAHs) with one to five aromatic rings, and the metal ions Cd(II), Cr(III), Pb(II), and Pb(IV)...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29075017/assessment-of-a-novel-pinhole-supplementary-implant-for-sulcus-fixation-in-pseudophakic-cadaver-eyes
#8
K T Tsaousis, L Werner, C L C Trindade, J Guan, J Li, N Reiter
PurposeTo evaluate a novel small-aperture supplementary implant that applies the principle of pinholes for management of irregular astigmatism, in postmortem human eyes.MethodsPseudophakic human cadaver eyes were imaged by anterior segment optical coherence tomography (AS-OCT) to assess position of the in-the-bag intraocular lens (IOL). Eyes were prepared as per the Miyake-Apple technique. Two versions of the supplementary implant (open-loop and tripod designs) were then inserted into the sulcus of each eye...
October 27, 2017: Eye
https://www.readbyqxmd.com/read/29074305/scleral-lens-after-intracorneal-ring-segments-in-patients-with-keratoconus
#9
Varsha M Rathi, Preeji S Mandathara, Srikanth Dumpati, Virender S Sangwan
BACKGROUND: To report the use of scleral lens (ScCL) to improve vision in patients having keratoconus who had intracorneal ring segment (ICRS) surgery. METHODS: Two eyes of two keratoconus patients fitted with ScCL (PROSE - prosthetic replacement of the ocular surface ecosystem, USA) after having undergone ICRS surgery are reported as noncomparative interventional case series. The ICRS implanted were INTACs and kerarings. Indications, visual acuity with ScCL, complications and follow-up are reported...
October 24, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29067533/double-flanged-haptic-and-capsular-tension-ring-or-segment-for-sutureless-fixation-in-zonular-instability
#10
Sergio Canabrava, Leticia Bernardino, Thais Batisteli, Gabriella Lopes, Alberto Diniz-Filho
PURPOSE: This paper introduces a surgical technique for the sutureless management of zonular dialysis greater than 120° using a capsular tension segment (CTS) or a modified capsular tension ring (m-CTR; CTR with suturing eyelets) and a haptic removed from a 3-piece polypropylene IOL. METHODS: A CTR is used as normal. Cataract removal is followed by connection of the CTS or m-CTR to the single haptic and created using heat to make a flange in one haptic's extremity...
October 24, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29063193/vasodilatory-effect-of-l-arginine-on-isolated-rabbit-and-human-posterior-ciliary-arteries-in-vitro-and-increased-optic-disc-blood-flow-in-vivo
#11
Hideki Chuman, Takako Sugimoto, Nobuhisa Nao-I
PURPOSE: This study aimed to clarify the vasodilatory effect of L-arginine on isolated rabbit and human posterior ciliary arteries (PCAs) and to investigate changes in optic disc blood flow after an infusion of L-arginine in vivo. METHODS: Vascular ring segments were mounted on a double myograph system. After obtaining maximal contraction following administration of high-K solution, L-arginine was administrated. Six volunteers received an intravenous drip infusion of 100 ml of L-arginine or saline...
October 23, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29062770/dependence-of-dynamic-contour-and-goldmann-applanation-tonometries-on-peripheral-corneal-thickness
#12
Federico Saenz-Frances, Claudia Sanz-Pozo, Lara Borrego-Sanz, Luis Jañez, Laura Morales-Fernandez, Jose Maria Martinez-de-la-Casa, Julian Garcia-Sanchez, Julian Garcia-Feijoo, Enrique Santos-Bueso
AIM: To determine the effects of peripheral corneal thickness (PCT) on dynamic contour tonometry(DCT) and Goldmann applanation tonometry (GAT). METHODS: A cross-sectional study. We created a software which calculates the corneal contour (CC) as a function of the radius from the corneal apex to each pixel of the contour. The software generates a central circumference with a radius of 1 mm and the remainder of the cornea is segmented in 5 rings concentric with corneal apex being its diameter not constant around the corneal circumference as a consequence of the irregular CC but keeping constant the diameter of each ring in each direction of the contour...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29062151/a-new-species-of-the-rare-genus-anguillonema-fuchs-1938-nematoda-hexatylina-sphaerularioidea-with-its-molecular-phylogenetic-study
#13
Mahyar Mobasseri, Majid Pedram, Ebrahim Pourjam
Anguillonema amolensis n. sp. is described and illustrated based on its morphological, morphometric, and molecular characters. The new species is characterized by its 575 to 820 μm long and wide body (body width at vulva = 30 to 59 μm), irregularly ventrally curved after fixation, five to six lines in lateral fields, 6.0 to 7.5 μm long stylet with small rounded knobs, pharynx lacking a median bulb, pharyngo-intestinal junction anterior to nerve ring and excretory pore, females with monodelphic-prodelphic reproductive system, 15 to 19 μm long conical tail with broad rounded tip, and males absent...
September 2017: Journal of Nematology
https://www.readbyqxmd.com/read/29060629/development-of-a-radiobiological-evaluation-tool-to-assess-the-expected-clinical-impacts-of-contouring-accuracy-between-manual-and-semi-automated-segmentation-algorithms
#14
Yusung Kim, Kaustubh Anil Patwardhan, Reinhard R Beichel, Brian J Smith, Christopher Mart, Kristin A Plichta, Tangel Chang, Milan Sonka, Michael M Graham, Vince Magnotta, Thomas Casavant, Junyi Xia, John M Buatti
RADEval is a tool developed to assess the expected clinical impact of contouring accuracy when comparing manual contouring and semi-automated segmentation. The RADEval tool, designed to process large scale datasets, imported a total of 2,760 segmentation datasets, along with a Simultaneous Truth and Performance Level Estimation (STAPLE) to act as ground truth tumor segmentations. Virtual dose-maps were created within RADEval and two different tumor control probability (TCP) values using a Logistic and a Poisson TCP models were calculated in RADEval using each STAPLE and each dose-map...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059240/formation-of-the-chaperonin-complex-studied-by-2d-nmr-spectroscopy
#15
Toshio Takenaka, Takashi Nakamura, Saeko Yanaka, Maho Yagi-Utsumi, Mahesh S Chandak, Kazunobu Takahashi, Subhankar Paul, Koki Makabe, Munehito Arai, Koichi Kato, Kunihiro Kuwajima
We studied the interaction between GroES and a single-ring mutant (SR1) of GroEL by the NMR titration of 15N-labeled GroES with SR1 at three different temperatures (20, 25 and 30°C) in the presence of 3 mM ADP in 100 mM KCl and 10 mM MgCl2 at pH 7.5. We used SR1 instead of wild-type double-ring GroEL to precisely control the stoichiometry of the GroES binding to be 1:1 ([SR1]:[GroES]). Native heptameric GroES was very flexible, showing well resolved cross peaks of the residues in a mobile loop segment (residue 17-34) and at the top of a roof hairpin (Asn51) in the heteronuclear single quantum coherence spectra...
2017: PloS One
https://www.readbyqxmd.com/read/29041571/segmented-bessel-beams
#16
Angelina Müller, Matthias C Wapler, Ulrike Wallrabe
We investigate segmented Bessel beams that are created by placing different ring apertures behind an axicon that is illuminated with a plane wave. We find an analytical estimate to determine the shortest possible beam segment by deriving a scale-invariant analytical model using appropriate dimensionless parameters such as the wavelength and the axicon angle. This is verified using simulations and measurements, which are in good agreement. The size of the ring apertures was varied from small aperture sizes in the Frauhofer diffraction limit to larger aperture sizes in the classical limit...
September 18, 2017: Optics Express
https://www.readbyqxmd.com/read/29038978/panuveitis-like-reaction-following-encircling-laser-retinopexy-cerclage-in-a-21-year-old-male
#17
David Francis Fullon Chan, Milagros Herrera-Arroyo, Darby E Santiago, Teresita R Castillo, Ma Florentina Q Fajardo-Gomez
BACKGROUND: Severe vision-impairing ocular inflammation is rarely reported following extensive laser. Previous cases have involved retinal photocoagulation for diabetic retinopathy resolving over days. This report documents a rare instance of this where encircling retinopexy/cerclage was done as fellow eye retinal detachment prophylaxis in a patient with no overt comorbidities. RESULTS: A panuveitis-like reaction with severe, near-total visual impairment was documented 1 day following single-sitting encircling laser retinopexy/cerclage done as fellow eye prophylaxis for a 21-year-old male presenting with total retinal detachment in the other eye...
October 16, 2017: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/29027586/computational-simulation-study-on-ilio-sacral-screw-fixations-for-pelvic-ring-injuries-and-implications-in-asian-sacrum
#18
Chang-Soo Chon, Jin-Hoon Jeong, Bokku Kang, Han Sung Kim, Gu-Hee Jung
OBJECTIVES: Despite a high possibility of technique-related complications, ilio-sacral (IS) screw fixation is the mainstay of operative management in posterior pelvic ring injuries. We aimed to make IS screw trajectory with fully intraosseous path that was optimal and consistent, and confirm the possibility of transiliac-transsacral (TITS) screw fixation in Asian sacrum. METHODS: Eighty-two cadaveric sacra (42 males and 40 females) were enrolled and underwent continuous 1...
October 13, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28993070/the-effect-of-soft-contact-lens-thickness-in-visual-function-after-intracorneal-ring-segments-surgery
#19
G Carracedo, J Canales, P Gonzalez, A Rechionni, C Carpena-Torres, J Carballo-Álvarez
OBJECTIVE: To study the influence of soft contact lens (SCL) central thickness and material in keratoconus on visual function after intracorneal ring segment (ICRS) surgery. METHODS: A pilot, experimental, prospective, cross-sectional and double-blind study was performed. Fourteen keratoconus patients with age range of 34.75±9.22years (7 males and 7 females) with ICRS implanted were involved in the study. Two different SCL materials [Hioxifilcon A (G-5X/p-GMA/HEMA) and Lucifilcon A (silicone-hydrogel)] with four different central thicknesses (0...
October 6, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28991336/four-stage-procedure-for-keratoconus-icrs-implantation-corneal-cross-linking-toric-phakic-intraocular-lens-implantation-and-topography-guided-photorefractive-keratectomy
#20
Efekan Coskunseven, Daya Papalkar Sharma, Michael A Grentzelos, Onurcan Sahin, George D Kymionis, Ioannis Pallikaris
PURPOSE: To evaluate a four-stage combined treatment for keratoconus including intrastromal corneal ring segment (ICRS) implantation followed by corneal cross-linking (CXL), toric phakic intraocular lens (IOL) implantation, and topography-guided photorefractive keratectomy (TG-PRK). METHODS: In this retrospective interventional case series, 11 eyes of 7 patients with progressive keratoconus were treated with a four-stage procedure including the following: Keraring ICRS (Mediphacos Ltda, Belo Horizonte, Brazil) implantation followed by CXL, phakic IOL implantation, and TG-PRK (minimum 6 months between each stage)...
October 1, 2017: Journal of Refractive Surgery
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