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Ophthalmic surgery simulator

David F Chang, Nikki Hurley, Nick Mamalis, Jeffrey Whitman
PURPOSE: The common practice of short-cycle sterilization for ophthalmic surgical instrumentation has come under increased regulatory scrutiny. This study was undertaken to evaluate the efficacy of short-cycle sterilization processing for consecutive same-day cataract procedures. DESIGN: Testing of specific sterilization processing methods by an independent medical device validation testing laboratory. PARTICIPANTS: Phaco handpieces from 3 separate manufacturers were tested along with appropriate biologic indicators and controls using 2 common steam sterilizers...
March 27, 2018: Ophthalmology
Ting Huang, Ruifen Ye, Chen Ouyang, Chao Hou, Yunwei Hu, Qianni Wu
PURPOSE: To investigate whether use of donors predisposed by corneal collagen cross-linking (CXL) reduced myopic refractive errors for keratoconic eyes after penetrating keratoplasty (PK). DESIGN: Randomized controlled trial. METHODS: One hundred sixteen eyes of 116 patients with keratoconus from Zhongshan Ophthalmic Center were enrolled. Using stratified block randomization, we assigned eligible eyes to the CXL graft group (Group 1) or conventional graft group (Group 2)...
December 2017: American Journal of Ophthalmology
Colin A McCannel
PURPOSE: To assess the specificity of simulation-based virtual reality ophthalmic cataract surgery training on the Eyesi ophthalmic virtual reality surgical simulator, and test the hypothesis that microsurgical motor learning is highly specific. METHODS: Retrospective educational interventional case series. The rates of vitreous loss and retained lens material, and vitreous loss and retained lens material associated with an errant continuous curvilinear capsulorhexis (CCC) were assessed among 1037 consecutive cataract surgeries performed during four consecutive academic years at a teaching hospital...
August 2017: Transactions of the American Ophthalmological Society
Justis P Ehlers, Atsuro Uchida, Sunil K Srivastava
Intraoperative optical coherence tomography (OCT) is a potentially transformational technology that is now commercially available to ophthalmic surgeons. Currently, the use of the technology is primarily limited to a 'stop and image' approach due to the lack of OCT compatibility with surgical instrumentation. In this report, we describe multiple OCT-compatible surgical instruments that were developed for various surgical needs, based on previous evaluation of potential surgical materials for optical features and physical properties...
October 2017: British Journal of Ophthalmology
Tristan Bourcier, Jimmy Chammas, Pierre-Henri Becmeur, Arnaud Sauer, David Gaucher, Philippe Liverneaux, Jacques Marescaux, Didier Mutter
PURPOSE: To evaluate the feasibility of robot-assisted simulated cataract surgery. SETTING: Institut de Recherche Contre les Cancers de l'Appareil Digestif, European Institute of Telesurgery, and Strasbourg University Hospital, Strasbourg, France. DESIGN: Experimental study. METHODS: Cataract surgeries were performed on a Kitaro cataract wet-lab training system simultaneously using the Da Vinci Xi robotic surgical system and the Whitestar Signature phacoemulsification system...
April 2017: Journal of Cataract and Refractive Surgery
Tamer Adel Refai, Olfat A Hassanin
INTRODUCTION: The Goldmann applanation tonometer readings were noted to be markedly reduced after Lasik surgery using a thin flap technique which is widely used nowadays, to correct a wide range of myopia and astigmatism. The Ocular Response Analyzer (ORA) is considered one of the important tools for refinement of Intraocular Pressure (IOP) measurements. The aim of this study is to evaluate and refine ORA measurements for IOP changes post- M2 90 Moria microkeratome Lasik procedure for Egyptian myopic and astigmatic patients trying to aid in glaucoma diagnosis and management...
December 2016: Electronic Physician
Katrina A Mason, Evgenia Theodorakopoulou, Georgios Pafitanis, Ali M Ghanem, Simon R Myers
Microsurgery is used in a variety of surgical specialties, including Plastic Surgery, Maxillofacial Surgery, Ophthalmic Surgery, Otolaryngology and Neurosurgery. It is considered one of the most technically challenging fields of surgery. Microsurgical skills demand fine, precise and controlled movements, and microsurgical skill acquisition has a steep initial learning curve. Microsurgical simulation provides a safe environment for skill acquisition before operating clinically. The traditional starting point for anyone wanting to pursue microsurgery is a basic simulation training course...
September 2016: Medical Teacher
Dominic J Wu, Paul B Greenberg
OBJECTIVE: Medical students receive limited exposure to ophthalmology and ophthalmic surgery in the preclinical curriculum. To address this gap, the authors designed a self-directed preclinical elective course in ophthalmic surgery offered in the 2013-2014 academic year to all first- and second-year students at the study institution. DESIGN: Prospective cohort study with anonymous Likert-style questionnaires and qualitative responses. SETTING: Warren Alpert Medical School of Brown University, Providence, RI...
May 2016: Journal of Surgical Education
Rémy Jullienne, Pierre Manoli, Théophile Tiffet, Zhiguo He, Klervi Rannou, Gilles Thuret, Philippe Gain
UNLABELLED: An 85-year-old man presented with an unusual complication of cataract surgery. During injection of an ophthalmic viscosurgical device, Descemet membrane was accidentally dissected and removed during the capsulorhexis. Early postoperative visual acuity was counting fingers as a result of massive corneal edema. Using a mathematical model of the endothelium, we evaluated the corneal endothelial cell self-healing capacity from the periphery by calculating the theoretical endothelial cell density (ECD) after corneal endothelial cell redistribution...
October 2015: Journal of Cataract and Refractive Surgery
Jesse L Berry, Jonathan W Kim, Richard Jennelle, Melvin Astrahan
BACKGROUND AND OBJECTIVE: To describe a new surgical technique for intraoperative placement of Eye Physics (EP) plaques for uveal melanoma using a toric marker. PATIENTS AND METHODS: A toric marker is designed for cataract surgery to align the axis of astigmatism; its use was modified in this protocol to mark the axis of suture coordinates as calculated by Plaque Simulator (PS) software. RESULTS: The toric marker can be used to localize suture coordinates, in degrees, during intraoperative plaque placement...
September 2015: Ophthalmic Surgery, Lasers & Imaging Retina
Robert J Cionni, Ron Pei, Ramon Dimalanta, David Lubeck
PURPOSE: To evaluate the intensity and stability of the red reflex produced by ophthalmic surgical microscopes with nearly-collimated versus focused illumination systems and to assess surgeon preference in a simulated surgical setting. METHODS: This two-part evaluation consisted of postproduction surgical video analysis of red reflex intensity and a microscope use and preference survey completed by 13 experienced cataract surgeons. Survey responses were based on bench testing and experience in a simulated surgical setting...
August 2015: Translational Vision Science & Technology
Youxiong Yang, Guowen Zhan, Jianchun Liao, Ruishan Dang, Hongli Wang, Yang Li, Xiaote Zhang
The aim of this study was to investigate the relationship between the morphological characteristics of the sphenoid sinus and endoscopic localization of the cavernous sinus (CS) using an extended endoscopic endonasal transsphenoidal approach. Thirty sides of CS in 15 adult cadaver heads were dissected to simulate the extended endoscopic endonasal transsphenoidal approach, and the morphology of the sphenoid sinus and anatomic structures of CS were observed. The opticocarotid recess (OCR), ophthalmomaxillary recess (V1V2R), and maxillomandibular recess (V2V3R) in the lateral wall of the sphenoid sinus were presented in 16 sides (53...
September 2015: Journal of Craniofacial Surgery
Ann Sofia S Thomsen, Yousif Subhi, Jens Folke Kiilgaard, Morten la Cour, Lars Konge
TOPIC: This study reviews the evidence behind simulation-based surgical training of ophthalmologists to determine (1) the validity of the reported models and (2) the ability to transfer skills to the operating room. CLINICAL RELEVANCE: Simulation-based training is established widely within ophthalmology, although it often lacks a scientific basis for implementation. METHODS: We conducted a systematic review of trials involving simulation-based training or assessment of ophthalmic surgical skills among health professionals...
June 2015: Ophthalmology
Ann Sofia Skou Thomsen, Jens Folke Kiilgaard, Hadi Kjaerbo, Morten la Cour, Lars Konge
PURPOSE: To evaluate the EyeSi(™) simulator in regard to assessing competence in cataract surgery. The primary objective was to explore all simulator metrics to establish a proficiency-based test with solid evidence. The secondary objective was to evaluate whether the skill assessment was specific to cataract surgery. METHODS: We included 26 ophthalmic trainees (no cataract surgery experience), 11 experienced cataract surgeons (>4000 cataract procedures) and five vitreoretinal surgeons...
August 2015: Acta Ophthalmologica
Giamberto Casini, Pasquale Loiudice, Paolo Martinelli, Francesco Nasini, Marco Nardi
PURPOSE: To report a case of postsurgical shallow anterior chamber and elevated intraocular pressure (IOP) simulating malignant glaucoma. METHODS: A 20-year-old woman underwent EX-PRESS® device implant for treatment of primary open-angle glaucoma. RESULTS: Postoperative examination showed a shallow anterior chamber, the EX-PRESS® device embedded in the iris, an IOP of 28 mm Hg, and an annular detachment of the choroid ciliary body, suggesting hyperfiltration followed by EX-PRESS® blockage...
July 2015: European Journal of Ophthalmology
Diogo Sousa-Martins, Luciano Caseli, Mafalda C Figueiredo, Claudia Sa E Cunha, Helder Mota-Filipe, Acácio Souza-Lima, Rubens Belfort, Eduardo Rodrigues, Mauricio Maia
PURPOSE: To investigate and compare the mechanism by which lutein-based and synthetic intraocular dyes interact with their target membranes during ophthalmic surgeries. METHODS: Surrogate membrane models were used in order to simulate the different intraocular membranes: internal limiting membrane (ILM), vitreous, anterior capsule (AC), and epiretinal membrane (ERM). Different lutein-based dyes, such as Phacodyne, Retidyne, Retidyne Plus, and Vitreodyne were tested, as well as Trypan Blue (TB), Indocyanine Green (ICG), Brilliant Blue (BB), and Triamcinolone Acetonide (TA)...
March 2015: Investigative Ophthalmology & Visual Science
Marcel Pfister, Jaw-Chyng L Lue, Francisco R Stefanini, Paulo Falabella, Laurie Dustin, Michael J Koss, Mark S Humayun
PURPOSE: We hypothesized that reaction times (RTs) for a switch release are faster for hand-controlled than for foot-controlled switches for physiological and anatomical reasons (e.g., nerve conduction speed). The risk of accidental trauma could be reduced if the surgeon reacted quicker and therefore improve the surgical outcome. METHOD: We included 47 medical professionals at USC. Demographics and handedness were recorded. Under a microscope, a simple reaction time test was performed, testing all extremities multiple times in a random order...
2014: BioMed Research International
Samantha L Wilson, Alicia J El Haj, Ying Yang
Corneal structure is highly organized and unified in architecture with structural and functional integration which mediates transparency and vision. Disease and injury are the second most common cause of blindness affecting over 10 million people worldwide. Ninety percent of blindness is permanent due to scarring and vascularization. Scarring caused via fibrotic cellular responses, heals the tissue, but fails to restore transparency. Controlling keratocyte activation and differentiation are key for the inhibition and prevention of fibrosis...
2012: Journal of Functional Biomaterials
Joel Bergqvist, Anna Person, Anders Vestergaard, Jakob Grauslund
PURPOSE: To establish and evaluate a systematic training programme to be included into the ophthalmologic resident curriculum. METHODS: Medical students (n = 20) within a year from graduation and with no previous ophthalmic experience were included in this prospective study and randomized into two groups. Group A (n = 10) completed the Eyesi cataract simulator training programme once a week for 4 weeks, while Group B (n = 10) completed it once a week at the first and the last week...
November 2014: Acta Ophthalmologica
Vincent M Tutino, Max Mandelbaum, Hoon Choi, Liza C Pope, Adnan Siddiqui, John Kolega, Hui Meng
Carotid occlusions are associated with de novo intracranial aneurysm formation in clinical case reports, but this phenomenon is not widely studied. We performed bilateral carotid ligation (n=9) in rabbits to simulate carotid occlusion, and sham surgery (n=3) for control. Upon euthanasia (n=3 at 5 days, n=6 at 6 months post ligation, and n=3 at 5 days after sham operation), vascular corrosion casts of the circle of Willis (CoW) were created. Using scanning electron microscopy, we quantified gross morphologic, macroscopic, and microscopic changes on the endocasts and compared findings with histologic data...
March 2014: Journal of Cerebral Blood Flow and Metabolism
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