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Glaucoma drainage device

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https://www.readbyqxmd.com/read/29423340/the-effects-of-glaucoma-drainage-devices-on-oxygen-tension-glycolytic-metabolites-and-metabolomics-profile-of-aqueous-humor-in-the-rabbit
#1
Blake K Williamson, Nathan M Hawkey, Diane A Blake, Joshua W Frenkel, Kevin P McDaniel, Justin K Davis, Celine Satija, Alex Beazer, Suraj Dhungana, James Carlson, Susan McRitchie, Ramesh S Ayyala
Purpose: Glaucoma drainage device (GDD) implantation can lead to corneal decompensation. We evaluated changes over time in oxygen tension and in the metabolic environment of the aqueous humor after GDD implantation in the rabbit eye. Methods: Ahmed Glaucoma Valves were implanted in the left eyes of eight male New Zealand white rabbits. Right eyes were used as a control. Oxygen tension was measured immediately before surgery and at 1 and 2 months postoperation. Aqueous humor was collected from the surgical and control eyes at 1, 2, and 5 months postoperation...
February 2018: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/29405795/oral-mucosa-grafting-in-periorbital-reconstruction
#2
Andre Grixti, Raman Malhotra
To provide an extensive literature review on the clinical indications of oral mucosa grafts (OMG) and minor salivary gland grafts (MSGG) in periorbital reconstruction together with safe practice graft harvesting techniques to minimize donor-site morbidity. A literature review was performed by searching the databases of PUBMED, EMBASE, and COCHRANE library using the keywords: minor salivary glands; oral mucosal graft; orbit; and eye. The bibliographies of the pertinent articles were examined for additional papers...
February 6, 2018: Orbit
https://www.readbyqxmd.com/read/29383822/comparison-of-diode-laser-trans-scleral-cyclophotocoagulation-versus-implantation-of-a-350-mm2-baerveldt-glaucoma-drainage-device-for-the-treatment-of-glaucoma-in-dogs-a-retrospective-study-2010-2016
#3
Kathleen L Graham, Evelyn J S Hall, Charles Caraguel, Andrew White, Francis A Billson, F Mark Billson
OBJECTIVE: To compare outcomes following trans-scleral cyclophotocoagulation (TSCP) and 350-mm2 Baerveldt implantation in the treatment of canine refractory glaucoma. DESIGN: Retrospective case study. CASE SELECTION: Client owned dogs undergoing surgical treatment of glaucoma within a veterinary referral hospital. PROCEDURES: Eighty-six glaucoma surgeries were performed on 83 eyes (69 dogs) diagnosed with primary or secondary glaucoma...
January 31, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29376002/a-feasibility-study-of-using-biodegradable-magnesium-alloy-in-glaucoma-drainage-device
#4
REVIEW
Xiang-Ji Li, Lin Xie, Fu-Sheng Pan, Yong Wang, Hong Liu, Yu-Rong Tang, Cindy Ml Hutnik
Technological advances in glaucoma have challenged the traditional treatment paradigm. Historically incisional surgery has been used in cases of advanced disease and/or uncontrolled intraocular pressures resistant to medical or laser interventions. More recently, perhaps due to advancements in imaging, surgery has been suggested to be beneficial earlier in the treatment paradigm. Despite these trends, surgical manipulation of the tissues and unpredictability of wound healing continue to result in surgical failure...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29370031/comparison-of-visual-and-anatomical-outcomes-of-eyes-undergoing-type-i-boston-keratoprosthesis-with-combination-pars-plana-vitrectomy-with-eyes-without-combination-vitrectomy
#5
Jennifer I Lim, Lindsay Machen, Andrea Arteaga, Faris I Karas, Robert Hyde, Dingcai Cao, Marcia Niec, Thasarat S Vajaranant, M Soledad Cortina
PURPOSE: To determine whether 1-year visual and anatomical results after surgery combining pars plana vitrectomy, Boston keratoprosthesis, and a glaucoma drainage device as needed are similar, better, or worse than Boston keratoprosthesis initial implantation alone. METHODS: We performed a retrospective review of adult patients undergoing Boston keratoprosthesis at our institution. Visual acuity outcomes, anatomical results, and complication rates of patients undergoing combination surgery (including pars plana vitrectomy and a posterior glaucoma drainage device) were compared with those undergoing keratoprosthesis placement alone...
January 23, 2018: Retina
https://www.readbyqxmd.com/read/29350692/control-and-optimisation-of-fluid-flow-in-glaucoma-drainage-device-surgery
#6
Kin Sheng Lim
Avoidance of hypotony in the early post-operative phase following glaucoma drainage device surgery is paramount, if serious complications are to be avoided. Current strategies of preventing early hypotony are either a valve mechanism, as those found in Ahmed Glaucoma Valve or flow restrictor as used in Baerveldt or Molteno implants. The Ahmed glaucoma valve has a pre-tensioned valve which opens and closes at the pre-determined level of intra-ocular pressure. Although the opening and closing pressure can be slightly inconsistent, coinciding with the change of material used in the plate construction, the reliability appears to have improved in recent years...
January 19, 2018: Eye
https://www.readbyqxmd.com/read/29303880/ab-interno-tube-occlusion-for-postoperative-hypotony-in-a-patient-with-an-ahmed-glaucoma-drainage-device
#7
Max Feinstein, Kareem Moussa, Ying Han
PURPOSE: To report a case of Ahmed glaucoma valve-induced hypotony that was successfully managed with postoperative intraluminal stenting of the aqueous shunt tube. PATIENT AND METHODS: We describe a 68-year-old male with advanced uveitic glaucoma with an intraocular pressure (IOP) of 25▒mm Hg in the left eye. The patient initially responded well to an Ahmed glaucoma valve implant, but at 10 weeks post-implantation, the patient underwent cataract surgery and developed persistent hypotony, choroidal folds, and decreased vision...
January 4, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29282404/baerveldt-scleral-patch-graft-abscess-secondary-to-coagulase-negative-staphylococcus
#8
Van Nguyen, Mason Schmutz, Sarah Farukhi, Sameh Mosaed
We report the case of a 69-year-old female who underwent a Baerveldt implant placement for severe-stage primary open-angle glaucoma and developed a bacterial infection of the conjunctiva and abscess of the scleral patch graft with subsequent tube exposure. The infection was identified 3 weeks postoperatively and a topical antibiotic was immediately initiated. A concurrent systemic staphylococcal infection was discovered by an outside physician and oral cephalexin was initiated. Despite antibiotic treatment, the conjunctival erosion progressed, and tube revision was required...
September 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/29240598/intraluminal-deposits-found-in-glaucoma-tube-shunts-via-anterior-segment-ocular-coherence-tomography
#9
Jorge A Alvarado, Vinita Srivastava, Yang Sun
PURPOSE: To describe and characterize a novel observation of intraluminal deposits of glaucoma tube shunts (TS) using spectral domain (SD) ocular coherence topography (OCT). PATIENTS AND METHODS: Fifteen TS in 11 patients diagnosed with primary open angle, neovascular, aphakic, and uveitic glaucomas. Both Ahmed (n=11) and Baerveldt (n=4) TS were examined with 5-line raster anterior segment SD-OCT imaging. RESULTS: The exposed tubes of two patients had highly reflective intraluminal deposits in the corresponding exposed areas...
December 13, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29239864/trabeculectomy-outcomes-after-glaucoma-drainage-device-surgery
#10
Reza Alizadeh, Handan Akil, James Tan, Simon K Law, Joseph Caprioli
PURPOSE: To evaluate outcomes of trabeculectomy with adjunctive Mitomycin-C (MMC) in patients with uncontrolled intraocular pressure (IOP) after glaucoma drainage device implantation (GDD). METHODS: Consecutive patients who had undergone a trabeculectomy after GDD were reviewed. The primary outcome was surgical success with stratified IOP targets based on the following criteria: (A) IOP <18▒mm Hg and IOP reduction of 20%; (B) IOP <15▒mm Hg and IOP reduction of 25%; (C) IOP <12▒mm Hg and IOP reduction of 30%...
December 12, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29217351/endophthalmitis-then-and-now
#11
Nidhi Relhan, Richard K Forster, Harry W Flynn
PURPOSE: To report historically evolving strategies (then and now) in prevention and management of endophthalmitis. DESIGN: A perspective on relevant topics in the prophylaxis and management of endophthalmitis. METHODOLOGY: This is an author selected review of studies leading to changes in strategies for endophthalmitis management over the last 100 years. RESULTS: The current perspective discusses the trends and strategies over the past century...
December 4, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29211548/aqueous-drainage-device-erosion-a-review-of-rates-risks-prevention-and-repair
#12
Upneet Bains, Ambika Hoguet
Aqueous drainage device tube erosions require prompt intervention to prevent endophthalmitis. As the use of drainage devices in glaucoma surgery continues to increase, recognizing and managing tube erosions is a pertinent issue. This review provides a comprehensive overview of tube erosions, including the rates of erosion with various types of patch grafts, the risk factors associated with erosion, and approaches to repair in order to counsel and treat our patients to prevent endophthalmitis.
December 6, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/29199011/long-term-outcome-of-second-ahmed-valves-in-adult-glaucoma
#13
Nima Fatehi, Esteban Morales, Nucharee Parivisutt, Reza Alizadeh, Grace Ang, Joseph Caprioli
PURPOSE: To evaluate the long-term outcomes of second Ahmed glaucoma valve (AGV) implants in eyes with glaucoma. DESIGN: Retrospective interventional case-series. METHODS: Patients with sequential second Ahmed valves implanted in the same eye from 1994 to 2016 were included. Success was defined with three criteria: (A) Intraocular pressure (IOP) ≤ 21 mmHg and IOP reduction of 20%; (B) IOP ≤18 mmHg and IOP reduction of 25%; and (C) IOP ≤15mm Hg and IOP reduction of 30%...
November 30, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29177182/glaucoma-surgery-and-induced-astigmatism-a-systematic-review
#14
REVIEW
Helen H L Chan, Yu Xiang G Kong
Background: The refractive outcomes of glaucoma surgeries, particularly their effect on astigmatism, are incompletely understood. Main body: Trabeculectomy is associated with a considerable amount of with-the-rule astigmatic change in the immediate postoperative period. This is followed by a gradual against-the-rule shift. These changes are altered with the use of mitomycin C (MMC). Non-penetrating surgery such as deep sclerectomy is also associated with a similar or smaller degree of induced astigmatism...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29117009/risk-factors-for-earlier-re-exposure-of-glaucoma-drainage-devices
#15
Atalie C Thompson, Varsha Manjunath, Kelly W Muir
PURPOSE: The purpose of this study was to investigate factors associated with a second exposure of a glaucoma drainage device (GDD) following repair of an initial GDD exposure. MATERIALS AND METHODS: This IRB-approved retrospective cohort study examined the incidence of a second exposure of a GDD following initial repair for exposure. Logistic regression was performed to assess the relationship between demographic and clinical characteristics and a second exposure of the GDD...
November 7, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29077179/hyaluronidase-injection-for-improved-tissue-dissection-in-baerveldt-tube-surgery
#16
Alon Zahavi, John R Grigg
PURPOSE: To describe a novel technique for tissue dissection during Baerveldt tube surgery. METHODS: We present a technique for posterior dissection of conjunctiva and Tenon tissue for the placement of a glaucoma drainage device. Hyaluronidase is used in the early stages of surgery in order to minimize tissue trauma and facilitate easy dissection even through existing adhesions and conjunctival scarring. RESULTS: The technique facilitates convenient dissection through tissues...
October 16, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29062779/understanding-practice-patterns-of-glaucoma-sub-specialists-in-india
#17
Nikhil S Choudhari, Vanita Pathak-Ray, Sushmita Kaushik, Prateep Vyas, Ronnie George
AIM: To obtain information on the prevailing practice patterns of glaucoma specialists in India. METHODS: Glaucoma specialists attending the Annual Conference of the Glaucoma Society of India (GSI) were surveyed. This survey, conducted in 2013, was based on an interactive audience response system. RESULTS: The information was obtained from 146 glaucoma specialists. Approximately half (n=83; 57%) had ≥10y of experience in managing glaucoma and were in institutional practice (n=74, 51%)...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29049735/clinical-and-biological-evaluations-of-biodegradable-collagen-matrices-for-glaucoma-drainage-device-implantation
#18
COMPARATIVE STUDY
Minjung Song, Seunghyun Lee, Deokyeong Choe, Sera Kim, Young Hoon Roh, Seungsoo Rho
Purpose: To characterize the clinical and biological properties of biodegradable collagen matrices (BCMs) for possible glaucoma drainage device implantation. Methods: A total of 68 refractory glaucoma eyes, followed up postoperatively for at least 6 months, were consecutively enrolled after retrospective chart review. The BCM-augmented Ahmed valve implantations (BAAVI) using our Ologen-6 and Ologen-7 valves were performed and compared with a conventional method...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29045330/simultaneous-implantation-of-an-ahmed-and-baerveldt-glaucoma-drainage-device-for-uncontrolled-intraocular-pressure-in-advanced-glaucoma-comment
#19
Richa Gupta, Surabhi Gupta
No abstract text is available yet for this article.
October 17, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29034151/aqueous-shunt-implantation-in-glaucoma
#20
REVIEW
Jing Wang, Keith Barton
Aqueous shunts or glaucoma drainage devices are increasingly utilized in the management of refractory glaucoma. The general design of the most commonly-used shunts is based on the principles of the Molteno implant: ie. a permanent sclerostomy (tube), a predetermined bleb area (plate) and diversion of aqueous humour to the equatorial region and away from the limbal subconjunctival space. These three factors make aqueous shunts more resistant to scarring as compared to trabeculectomy. The two most commonly used shunts are the Ahmed Glaucoma Valve, which contains a flow-restrictor, and the non-valved Baervedlt Glaucoma Implant...
July 2017: Taiwan Journal of Ophthalmology
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