Sharmila Devi, V (2009) A Clinical Study on the outcome of Mehta valve implant. Masters thesis, Madras Medical College, Chennai.
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Abstract
INTRODUCTION: Glaucoma drainage devices are important tools in the management of Refractory glaucomas. It was introduced by Molteno in 1969 to treat Refractory glaucomas. They were referred to as Setons previously because solid structures with shaft such as threads, wires or hairs were placed in the wound to form a patent drainage fistula. AIM OF THE STUDY: To measure the outcome of Mehta valve implant in 25 cases (26 eyes) of intractable glaucoma inserted using a modified surgical technique that eliminates the need for a donor scleral graft. The main outcomes included 1. Analysis of intraocular pressure control following surgery & comparison with the preoperative baseline IOP. 2. Frequency of intraoperative and postoperative complications. 3. Success rate of the procedure at a follow up of 6months, 1year, 18 Months & 2 years. INCLUSION CRITERIA Patients between the ages of 30-70 yrs were taken. One patient alone was in the paediatric age group. Patients with Glaucoma uncontrolled on maximum tolerated medical therapy & were considered at high risk of failure for trabeculectomy or had previously failed trabeculectomy were taken. MATERIALS AND METHODS: A total of 26 eyes of 25 patients diagnosed as refractory Glaucoma attending the Glaucoma service of GOH between August 2006 & October 2008 were enrolled in this study. RESULTS: Mehta valve implantation was done in 26 eyes of 25 patients during the 2 year study period between September 2006 & October 2008. The male to female ratio was 2:1 & the mean age was 48.06(range 10-64 yrs). The mean pre-operative IOP was 37.4mmHg. CONCLUSION: In terms of IOP control Mehta implant was found to be good in patients with uncontrolled complicated glaucoma cases. The fall in IOP was sustained over the period of follow up. It is a valved implant & hence it prevents post operative hypotony by providing resistance to the flow & therefore regulating the pressure within the desired range. All cases were done without patch graft & tube was secured in the intra scleral tunnel. In conclusion, Mehta valve implant is a simple & an effective device & it could be a good treatment option in intractable glaucomas. Nevertheless longer follow up is necessary to examine the long term course of the success rate.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Mehta valve implant; Glaucoma drainage devices; Refractory glaucomas |
| Subjects: | MEDICAL > Ophthalmology |
| Depositing User: | Devi S |
| Date Deposited: | 01 Aug 2017 11:37 |
| Last Modified: | 01 Aug 2017 11:37 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/2442 |
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