Citation Information :
Ortiz Arismendi GE, Peña Valderrama CD, Albis-Donado O. Results of a New Technique for Implantation of Nonrestrictive Glaucoma Devices. J Curr Glaucoma Pract 2013; 7 (3):130-135.
Objective: To describe and present results of an original technique for nonvalved glaucoma implants.
Patients and methods: Thirty-five eyes of 34 patients with aggressive and/or advanced glaucomas of different causes were included. A Baerveldt implant was used in all cases, using an absorbable ligature that had been titrated to allow fow from day 1, but avoiding hypotony. Intraocular pressure (IOP) during the first 8 weeks, final IOP, visual acuity and complications were analyzed.
Results: Mean preoperative IOP was 42.8 mm Hg (range: 24-64 mm Hg). IOP was 14.4, 17.2, 18.6, 19 and 16.4 mm Hg during the 1, 2, 4, 6 and 8 postoperative weeks. Mean final IOP was 13.8 ± 4.25 mm Hg, a 67.8% reduction, after a mean follow-up time of 13 months (range: 8-29 months). Twenty-nine eyes (82.9%) had complete success, two had qualifed success (5.7%) and four were failures (11.4%). Choroidal detachments and transient tube obstructions were the most frequent complications.
Conclusion: Titrated ligature of Baerveldt tubes was effective for controlling IOP during both the early and late postoperative phases in eyes with severe glaucomas.
Nguyen QH. Avoiding and managing complications of glaucoma drainage implants. Curr Opin Ophthalm 2004 Apr;15(2):147- 150.
Rietveld E, van der Veen AJ. Postoperative pressure regulation in glaucoma shunt surgery: focal tube constriction is not the answer. J Glaucoma 2004 Jun;13(3):216-220.
Kansal S, Moster MR, Kim D, Schmidt CM Jr, Wilson RP, Katz LJ. Effectiveness of nonocclusive ligature and fenestration used in Baerveldt aqueous shunts for early postoperative intraocular pressure control. J Glaucoma 2002 Feb;11(1):65-70.
Albis-Donado, O. Atlas of glaucoma surgery. In: Shaarawy T, Mermoud A, editors. New Delhi, India: Jaypee Brothers Medical Publishers Pvt. Ltd; 2006. Chapter 6: the Ahmed Valve. p. 58-76.
Krupin T, Podos SM, Becker B, Newkirk JB. Valve implants in filtering surgery. Am J Ophthalmol 1976 Feb;81(2):232-235.
Krupin eye valve with disk for filtration surgery. The Krupin Eye Valve Filtering Surgery Study Group [editorial]. Ophthalmology 1994 Apr;101(4):651-658.
Coleman AL, Hill R, Wilson RM, Choplin N, Kotas-Neumann R, Tam M, Bacharach J, Panek WC. Initial clinical experience with the Ahmed Glaucoma Valve Implant. Am J Ophthalmol 1995 Jul;120(1):23-31.
Rosenberg LF, Krupin T. Implants in glaucoma surgery. In: Ritch R, Shields MB, Krupin T, editors. The glaucomas. 2nd ed. St. Louis: CV Mosby; 1996. p 1783-1807.
Taglia DP, Perkins TW, Gangnon R, Heatley GA, Kaufman PL. Comparison of the Ahmed Glaucoma Valve, the Krupin Eye Valve with Disk, and the double-plate Molteno implant. J Glaucoma 2002 Aug;11(4):347-353.
Syed HM, Law SK, Nam SH, Li G, Caprioli J, Coleman A. Baerveldt-350 implant versus Ahmed valve for refractory glaucoma: a case-controlled comparison. J Glaucoma 2004 Feb;13(1):38-45.
Nouri-Mahdavi K, Caprioli J. Evaluation of the hypertensive phase after insertion of the Ahmed Glaucoma Valve. Am J Ophthalmol 2003 Dec;136(6):1001-1008.
Susanna R Jr; Latin American Glaucoma Society (SLAG) Investigators. Partial Tenon's capsule resection with adjunctive mitomycin C in Ahmed glaucoma valve implant surgery. Br J Ophthalmol 2003 Aug;87(8):994-998.
Prata JA Jr, Santos RC, Labree L, Minckler DS. Surface area of glaucoma implants and perfusion flow rates in rabbit eyes. J Glaucoma 1995 Aug;4(4):274-280.
Wilcox MJ, Minckler DS, Ogden TE. Pathophysiology of artificial aqueous drainage in primate eyes with molteno implants. J Glaucoma 1994 Summer;3(2):140-151.
Heuer DK, Lloyd MA, Abrams DA, Baerveldt G, Minckler DS, Lee MB, Martone JF. Which is better? One or two? A randomized clinical trial of single-plate versus double-plate Molteno implantation for glaucomas in aphakia and pseudophakia. Ophthalmology 1992 Oct;99(10):1512-1519.
Francis BA, Cortes A, Chen J, Alvarado JA. Characteristics of glaucoma drainage implants during dynamic and steady-state flow conditions. Ophthalmology 1998 Sep;105(9):1708-1714