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Glaucoma drainage device

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https://www.readbyqxmd.com/read/28442696/surgical-management-of-pediatric-glaucoma
#1
Ingrid Chang, Joseph Caprioli, Yvonne Ou
Pediatric glaucoma surgery is challenging because of the differences in anatomy from the adult, differences in the behavior of the tissues of a child's glaucomatous eye, the variety in causes of the disease, and difficulties with postoperative management. Goniotomy and trabeculotomy are the preferred initial treatments for primary congenital glaucoma. Trabeculectomy with adjunctive mitomycin C is more likely to succeed in older, phakic patients, but carries the long-term risk of bleb-associated endophthalmitis...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28442690/mini-drainage-devices-for-anterior-and-intermediate-filtration
#2
Marco Nardi, Chiara Posarelli, Francesco Nasini, Michele Figus
Mini glaucoma devices for external filtration may be implanted with an ab externo procedure (Ex-PRESS and InnFocus Microshunt) or with an ab interno procedure (XEN Gel stent). The Ex-PRESS is an FDA-approved mini glaucoma device that has been developed in order to simplify anterior guarded filtering procedures, making them faster, safer and easier. It is positioned under a scleral flap and it is introduced in the anterior chamber through a needle hole, avoiding the excision of the corneal-scleral button and the iridectomy...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28441214/the-osteo-odonto-keratoprosthesis
#3
Mehran Zarei-Ghanavati, Venkata Avadhanam, Alfonso Vasquez Perez, Christopher Liu
PURPOSE OF REVIEW: To describe the practice of and recent developments in the osteo-odonto-keratoprosthesis. RECENT FINDINGS: Formal psychological assessment and support have been described. A sub-aqua system for fashioning the osteo-odonto-keratoprosthesis lamina; adoption of thicker laminae; use of bisphosphonate drugs; advances in laminar imaging; and use of bone augmentation and bone morphogenetic protein have been described for prevention, detection, and management of laminar resorption...
April 24, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28421664/intermediate-and-long-term-outcome-of-piggyback-drainage-connecting-glaucoma-drainage-device-to-a-device-in-situ-for-improved-intraocular-pressure-control
#4
Edward Dervan, Edward Lee, Antonio Giubilato, Tina Khanam, Panayiotis Maghsoudlou, William H Morgan
IMPORTANCE: This study provides results of a treatment option for patients with failed primary glaucoma drainage device BACKGROUND: To describe and evaluate the long term intraocular pressure (IOP) control and complications of a new technique joining a second glaucoma drainage device (GDD) directly to an existing GDD: termed "piggyback drainage". DESIGN: A retrospective, interventional cohort study PARTICIPANTS: 18 eyes of 17 patients who underwent piggyback drainage between 2004 and 2013 inclusive...
April 19, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28394811/glaucoma-drainage-device-erosion-following-ptosis-surgery
#5
Steven S Bae, Robert J Campbell
PURPOSE: To highlight the potential risk of glaucoma drainage device erosion following ptosis surgery. METHODS: Case report. RESULTS: A 71-year-old man underwent uncomplicated superotemporal Ahmed glaucoma valve implantation in the left eye in 2008. Approximately 8 years later, the patient underwent bilateral ptosis repair, which successfully raised the upper eyelid position. Three months postoperatively, the patient's glaucoma drainage implant tube eroded through the corneal graft tissue and overlying conjunctiva to become exposed...
April 7, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28379649/grafts-in-glaucoma-surgery-a-review-of-the-literature
#6
Sahil Thakur, Parul Ichhpujani, Suresh Kumar
Patients with bleb leakage, dehiscence, or infection after trabeculectomy need urgent bleb salvaging to prevent vision loss. Patients who have undergone a glaucoma drainage device surgery may have tube erosion, which is yet another devastating and outcome-compromising complication. The bleb or the tube in such cases needs to be patched by a biologic tissue, which is roofed by the conjunctiva and acts as a barrier against external infections. Sclera, pericardium, cornea, and dura mater are the commonly used patch graft materials...
March 29, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28356708/the-efficacy-of-alahmady-ring-implantation-in-the-management-of-neovascular-glaucoma
#7
Alahmady H Alsmman, Gamal Radwan, Mohammed Elagouz, Usama Ali Mohammed
PURPOSE: To evaluate the efficacy and safety of Alahmady ring implantation in the management of neovascular glaucoma. METHODS: A total of 15 eyes of 15 patients with intractable neovascular glaucoma with intraocular pressure (IOP) ≥28 mmHg not responding to medical treatment were retrospectively analyzed. All patients had poor visual acuity and underwent Alahmady ring implantation. The ring was designed from fenestrated silicon tube used in lacrimal surgeries and was implanted subsclerally after passing it through the anterior chamber...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28345564/innovations-in-glaucoma-surgery-from-dr-rajendra-prasad-centre-for-ophthalmic-sciences
#8
Tanuj Dada, Neha Midha, Pooja Shah, Talvir Sidhu, Dewang Angmo, Ramanjit Sihota
Trabeculectomy surgery is the current standard of care in glaucoma for achieving a low target intraocular pressure if medical therapy is not adequate. Augmentation of trabeculectomy with antimetabolites brought a revolutionary change in the long-term success rates of trabeculectomy, but along with it came a plethora of complications. There still is a big window for therapeutic innovations on this subject. The foremost target for these innovations is to modulate the wound healing response after glaucoma drainage surgery...
February 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28319643/grooved-glaucoma-drainage-devices-that-continuously-deliver-cyclosporine-a-decrease-postsurgical-scar-formation-in-rabbit-eyes
#9
Zhaoxing Dai, Xiaobo Yu, Jianguo Sun, Xinghuai Sun
Purpose: To study the functional outcomes of filtration surgery by implanting improved glaucoma drainage devices (GDDs) comprising surface grooves and a composite coating of cyclosporine A (CsA) and PLGA in experimental rabbit eyes. Methods: Improved GDDs were designed and prepared by modifying normal GDD with surface grooves and a CsA-PLGA composite coating. Normal GDDs, grooved GDDs (G-GDDs), and G-GDDs with a CsA-PLGA composite coating (CsA@G-GDD) were implanted into 18 rabbit eyes (six eyes per group)...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28303370/comparison-of-graft-survival-following-penetrating-keratoplasty-and-descemet-s-stripping-endothelial-keratoplasty-in-eyes-with-a-glaucoma-drainage-device
#10
Shawn M Iverson, Oriel Spierer, George C Papachristou, William J Feuer, Wei Shi, David S Greenfield, Terrence P O'Brien
PURPOSE: To compare corneal graft survival rates after penetrating keratoplasty (PK) and Descemet's stripping endothelial keratoplasty (DSEK) in patients with a glaucoma drainage device (GDD) or medically managed glaucoma. METHODS: A retrospective chart review was conducted on consecutive patients who underwent primary PK or primary DSEK. Inclusion criteria consisted of eyes with a diagnosis of glaucoma prior to corneal transplantation and a minimum of 6 months of follow-up...
March 16, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28301639/association-of-repeated-intravitreous-bevacizumab-injections-with-risk-for-glaucoma-surgery
#11
Brennan D Eadie, Mahyar Etminan, Bruce C Carleton, David A Maberley, Frederick S Mikelberg
Importance: Intravitreous injections of anti-vascular endothelial growth factor (VEGF) agents are associated with a sustained increase in intraocular pressure. This sustained elevated intraocular pressure could lead to higher rates of glaucoma surgery to lower this pressure. Objective: To determine the risk of glaucoma surgery following repeated intravitreous bevacizumab injections. Design, Setting, Participants: This nested, case-control study acquired and analyzed data from large, population-based, linked health databases supported by the British Columbia Ministry of Health in Canada...
April 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28301490/a-novel-flexible-microfluidic-meshwork-to-reduce-fibrosis-in-glaucoma-surgery
#12
Behzad Amoozgar, Xiaoling Wei, Jun Hui Lee, Michele Bloomer, Zhengtuo Zhao, Paul Coh, Fei He, Lan Luan, Chong Xie, Ying Han
PURPOSE/RELEVANCE: Fibrosis and hence capsule formation around the glaucoma implants are the main reasons for glaucoma implant failure. To address these issues, we designed a microfluidic meshwork and tested its biocompatibility in a rabbit eye model. The amount of fibrosis elicited by the microfluidic meshwork was compared to the amount elicited by the plate of conventional glaucoma drainage device. METHODS: Six eyes from 3 New Zealand albino rabbits were randomized to receive either the novel microfluidic meshwork or a plate of Ahmed glaucoma valve model PF7 (AGV PF7)...
2017: PloS One
https://www.readbyqxmd.com/read/28286307/strabismus-surgery-outcomes-in-eyes-with-glaucoma-drainage-devices
#13
Carla J Osigian, Kara M Cavuoto, Julia D Rossetto, Mohamed Sayed, Sara Grace, Ta C Chang, Hilda Capo
PURPOSE: To report strabismus surgery outcomes in eyes with prior implantation of glaucoma drainage devices (GDD). METHODS: The medical records of patients who underwent strabismus surgery for ocular misalignment that developed after implantation of a GDD over a 13-year period at a single institution were examined retrospectively. Patient characteristics, deviation types, preoperative measurements, surgical procedures, and postoperative measurements were analyzed...
April 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28276751/development-of-a-laser-controlled-device-to-modulate-intraocular-pressure
#14
REVIEW
Jeffrey L Olson, Ramanath Bhandari, Sergio Groman-Lupa, Daniela Santos-Cantu, Raul Velez-Montoya
The current standard of treatment for glaucoma is trabeculectomy. The use of glaucoma drainage devices has increased in recent years since its efficacy and safety was established as it provides an alternative surgical option. A downfall of these devices is the lack of proper flow rate control. Areas covered: In this paper we describe a glaucoma drainage device regulator that has already been protoyped and undergone initial testing. It consists of an implantable device with a semipermeable membrane that is used during glaucoma surgery and can be opened with either thermal or photodisruptive laser to adjust the amount of flow precisely and non-invasively, addressing the current difficulties of glaucoma surgeries...
March 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28269212/low-cost-rapid-prototyping-of-liquid-crystal-polymer-based-magnetic-microactuators-for-glaucoma-drainage-devices
#15
Hyunsu Park, Simon John, Hyowon Lee
Glaucoma is one of the leading causes of blindness in the world. Although there is no cure for glaucoma, pharmaceutical or surgical interventions are known to delay the progression of this debilitating disease. In recent years, implantation of glaucoma drainage devices (GDD) have increased due to their ability to manage IOP better than other therapeutic approaches. However, only 50% of the implanted devices remain functional after 5 years often due to biofouling. Here, we report our latest progress towards developing self-clearing GDDs using integrated magnetic microactuators...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28254440/combined-vitrectomy-and-glaucoma-drainage-device-implantation-surgical-approach-for-complex-pediatric-glaucomas
#16
Cem Ozgonul, Cagri G Besirli, Brenda L Bohnsack
PURPOSE: To evaluate efficacy of combined vitrectomy with posteriorly placed glaucoma drainage device (GDD) in lowering intraocular pressure (IOP) in children. METHODS: The medical records of children who underwent vitrectomy with posteriorly placed GDD were reviewed retrospectively. Patients with a minimum of 6 months' follow-up were included. The first eye operated on for each patient was analyzed. Success was defined as IOP of 5-20 mm Hg and no additional IOP-lowering surgery or visually devastating complications...
April 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28227442/low-cost-rapid-prototyping-of-liquid-crystal-polymer-based-magnetic-microactuators-for-glaucoma-drainage-devices
#17
Hyunsu Park, Simon John, Hyowon Lee, Hyunsu Park, Simon John, Hyowon Lee, Simon John, Hyowon Lee, Hyunsu Park
Glaucoma is one of the leading causes of blindness in the world. Although there is no cure for glaucoma, pharmaceutical or surgical interventions are known to delay the progression of this debilitating disease. In recent years, implantation of glaucoma drainage devices (GDD) have increased due to their ability to manage IOP better than other therapeutic approaches. However, only 50% of the implanted devices remain functional after 5 years often due to biofouling. Here, we report our latest progress towards developing self-clearing GDDs using integrated magnetic microactuators...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28176011/implantation-of-a-second-glaucoma-drainage-device
#18
Brian A Francis, Rodrigo A B Fernandes, Handan Akil, Vikas Chopra, Bruno Diniz, James Tan, Alex Huang
PURPOSE: To evaluate success rates in controlling intraocular pressure (IOP) after implantation of a second glaucoma drainage device (GDD) with a Baerveldt glaucoma implant in patients with refractory glaucoma, with a secondary aim of reducing the need for postoperative glaucoma medications. MATERIAL AND METHODS: This retrospective, noncomparative, interventional study included patients undergoing a second GDD for uncontrolled glaucoma from a tertiary care glaucoma service...
February 7, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28144751/glaucoma-drainage-device-surgery-in-children-and-adults-a-comparative-study-of-outcomes-and-complications
#19
Achilleas Mandalos, Velota Sung
PURPOSE: To compare the postoperative outcomes and complications of glaucoma drainage device (GDD) surgery in pediatric (<18 years old) and adult patients. METHODS: Retrospective, comparative study including all patients who underwent Baervedlt or Molteno device surgery by the same surgeon. Success criteria included postoperative intraocular pressure (IOP) between 6 and 21 mmHg and a 20% reduction from baseline. RESULTS: Fifty-two children (69 eyes) and 130 adults (145 eyes) were included...
February 1, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28139154/safety-and-efficacy-of-a-membrane-tube-type-glaucoma-shunt-device-an-animal-trial
#20
Dai Woo Kim, Young Hoon Hwang, Byung Heon Ahn, Eun-Kyung Lee, Chang-Sik Kim
PURPOSE: To evaluate the safety and efficacy of a membrane-tube-type glaucoma shunt device (MT-device), which was developed to control intraocular pressure (IOP) with a lower chance of complications than conventional glaucoma surgery, in a rabbit model. MATERIALS AND METHODS: The MT-device consists of an expanded polytetrafluoroethylene membrane (thickness 0.2 mm, area 2.5 × 2.5 mm(2)) and a tube (internal diameter 76 µm, external diameter 175.5 µm, length 7 mm) attached to the membrane...
January 31, 2017: Current Eye Research
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