Introduction: Ex-PRESS mini glaucoma shunt is a miniature, stainless steel, nonvalved device used for the treatment of glaucoma. The purpose of this study was to evaluate the safety of the Ex-PRESS glaucoma shunt during magnetic resonance (MR) imaging.
Methods: The effect of a magnetic field on the Ex-PRESS glaucoma shunt was evaluated in 4 scenarios. (1) Wet dish test: the device was placed floating in a dish filled with water and exposed to magnetic fields of 1.5 and 3 Tesla for 30 seconds. (2) Dry dish test: the device was placed on a dry dish and exposed to a magnetic field of 3 Tesla MR for 30 seconds. (3) Intracameral test: the device was floating freely in the anterior chamber of a human cadaver eye and was exposed to a magnetic field of 3 Tesla MR. (4) Scleral fixation test: the device was implanted through the sclera of a human cadaver eye and was exposed to a magnetic field of 3 Tesla MR.
Results: During the wet dish test the Ex-PRESS glaucoma shunt immediately moved across the dish with both 1.5 and 3 Tesla MR. No movements were noted during the dry dish test, intracameral test, or the scleral fixation test.
Conclusions: Although the Ex-PRESS glaucoma shunt is influenced by magnetic field forces, it is likely MR of up to 3 Tesla is safe due to resistance provided by the ocular tissue.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1097/IJG.0b013e3181a98bda | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Tube Insertion of Ahmed Glaucoma Valve Using a Micro-incision Scleral Tunnel Technique.
Cureus
December 2024
Department of Ophthalmology, Shimane University Faculty of Medicine, Izumo, JPN.
We report three cases demonstrating the efficacy and versatility of the micro-incision scleral tunnel (MIST) technique, a novel method for Ahmed glaucoma valve (AGV) tube insertion. MIST is characterized by its small incision, sutureless approach, anterior-to-posterior tunnel creation, and allograft-free design. The technique involves creating a scleral tunnel using a 1-mm crescent knife (Bleb Knife II), allowing for secure tube placement into the anterior chamber, ciliary sulcus, or vitreous cavity.
View Article and Find Full Text PDFRemoval of aqueous humor and conjunctival compression sutures for a dysesthesic filtering bleb: A surgical technique and case report.
Eur J Ophthalmol
December 2024
Ophthalmology Glaucoma Department, Fundación Oftalmológica Médica de la Comunidad Valenciana (FOM), Valencia, Spain.
Introduction: To present a novel surgical technique for the treatment of a steep-walled filtering bleb following an Ahmed glaucoma valve implant. The primary aim was to alleviate the patient's discomfort and address associated corneal thinning, complications that can arise from this condition.
Methods: Case report and surgical technique.
Impact of Ophthalmic Knowledge Assessment Program Scores and Surgical Volume on Subspecialty Fellowship Application in Ophthalmology Residency: Retrospective Cohort Study.
JMIR Med Educ
November 2024
University of Kansas School of Medicine, 7400 State Line Road, Prairie Village, KS, 66208-34444, United States, 1 913-588-6600, 1 913-588-0888.
Article Synopsis
- The study investigates differences in Ophthalmic Knowledge Assessment Program (OKAP) exam scores and surgical exposure among ophthalmology residents pursuing fellowship versus non-fellowship tracks.
- Results indicate that residents aiming for fellowships scored significantly higher on the OKAP exam in multiple categories, particularly in glaucoma and cornea sections.
- Surgical volumes were generally similar between both groups, but fellowship applicants had more experience with specific procedures related to their subspecialty, especially in glaucoma and pediatrics.*
Treatment Patterns of Childhood Glaucoma in the United States: Analysis of IRIS Registry (Intelligent Research in Sight).
Am J Ophthalmol
November 2024
From the Department of Ophthalmology (A.F., D.M.V., K.A., I.Y.C., D.S.F., A.L., A.C.L., J.W.M., P.P., K.S., T.E., N.Z., J.W.M., A.L.), Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, USA. Electronic address:
Article Synopsis
- The study aimed to analyze treatment patterns for childhood glaucoma in the U.S. by examining patient records from 2013 to 2020.
- It included 3069 patients, revealing that only 16.1% underwent surgery while 93.6% were treated with medications, with specific procedures varying based on the type of glaucoma.
- Key factors influencing the need for surgeries included having primary congenital glaucoma, higher intraocular pressure, and being younger than one year at diagnosis.
Minimally Invasive Tube Surgery (MITS)-A Novel Method in Glaucoma Drainage Device Implantation.
J Clin Med
November 2024
Western Eye Hospital, 153-173 Marylebone Road, London NW1 5QH, UK.
: We introduce a new surgical technique for inserting the eyePlate-300-a glaucoma drainage device (GDD). The flexibility of the eyePlate-300 allows for folding and insertion through a smaller conjunctival incision. The procedure is termed minimally invasive tube surgery (MITS).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!