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R. M. Pappas, L. S. Jones, S. Saith, O. U. Smith; Comparative Analysis of the Various Types of Express Shunts According to Lumen Size. Invest. Ophthalmol. Vis. Sci. 2009;50(13):450.
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To evaluate the effectiveness and rate of complications of the Ex-PRESS Mini Glaucoma Shunt in reducing IOP in eyes with uncontrolled glaucoma according to shunt lumen size.
A retrospective review of consecutive Ex-Press Mini Shunt cases was conducted at Pinnacle Eye Center, Howard University Hospital, and the University of Mississippi Medical Center between December 2007 to July 2008 was performed. Data analysis was performed using SPSS software version 15 (SPSS Inc, Chicago, Illinois, USA). The following preoperative data were recorded: best corrected visual acuity, intraocular pressure (IOP), number of preoperative glaucoma medications, history of prior glaucoma laser of incisional surgery, cup-to- disc ratio, mean and pattern standard deviation from Humphrey SITA visual field testing. Operative data including surgeon, technique, size of shunt, use of antimetabolites, and occurrence of complications were also recorded. Postoperative data collection included intraocular pressure (IOP) measured at day 1, week 1 and months 1, 3, 6, 9 and 12 as well as number of glaucoma medications at each time point, occurrence of bleb needling, flap suturelysis or removal, and occurrence of complications.
A total of 89 records of 89 consecutive patients and 102 eyes undergoing Ex-Press Mini Glaucoma Shunt implantation were reviewed. There were 62.7 % female (n=64) and 37.3% male patients (n=38). The mean age was 65 years. All surgeries were performed by a single surgeon at each centre with use of Mitomycin C and placement of the shunt under a partial thickness sclera flap. The IOP for all time points is shown in the following graph according to the size of shunt implanted.
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