• Users Online: 244
  • Print this page
  • Email this page
Year : 2020  |  Volume : 2  |  Issue : 1  |  Page : 16

Pars plana Ahmed glaucoma valve implantation in refractory glaucoma: Surgical technique and long-term outcomes

Centre for Sight, New Delhi, India

Correspondence Address:
Dr. Mithun Thulasidas
Centre for Sight, B-5/24, Safdarjung Enclave, New Delhi - 110 029
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/PAJO.PAJO_18_20

Rights and Permissions

Purpose: The aim of this study was to evaluate the long-term efficacy of intraocular pressure (IOP) control and complications of pars plana Ahmed glaucoma valve (AGV) implantation in refractory glaucoma patients. Design: This was a prospective interventional study. Materials and Methods: We conducted a single-center study, involving eyes with refractory glaucoma. Study variables were IOP, the number of glaucoma medications, and corrected distance visual acuity (CDVA) evaluated preoperatively and postoperatively at 1 day, 1 week, 1 month, 3 months, 6 months, and every 6 months till the last follow-up. Complete success was defined as absolute if IOP was between 6 and 21 mmHg in the absence of any glaucoma medication and qualified success if IOP was between 6 and 21 mmHg with medication at the last follow-up. Results: The study included 27 patients (29 eyes) with a mean age of 54.28 (standard deviation [SD]: 16.76; range: 11–73) years and a mean follow-up of 21.31 (SD: 20.38; range: 6–60) months. The mean IOP reduced from 38.14 (SD: 7.4; range: 25–50) mmHg preoperatively to 12.76 (SD: 3.92; range: 6–20) mmHg at the last follow-up (P <0.001). CDVA improved in 16 (55.2%) eyes, remained the same in 10 (34.5%) eyes, and worsened in 3 (10.3%) eyes. There was a mean reduction of antiglaucoma medications from 4.07 (SD: 0.26) preoperatively to 0.93 (SD: 1.31) postoperatively (P <0.001). The absolute success rate was 62%, reaching 100% in terms of qualified success. Postoperative complications included vitreous hemorrhage in 4 (13.8%) eyes, transient hypotony in 3 (10.3%) eyes, hyphema in 2 (6.9%) eyes, tube exposure in 2 (6.9%) eyes, and development of a small iris cyst in 1 (3.4%) eye. Conclusion: Pars plana implantation of AGV is a viable option in refractory glaucoma eyes where other surgical options are precluded, as it provides a good success rate with fewer postoperative complications. One must still keep a watch for tube exposure, vitreous incarceration in the tube, vitreous hemorrhage, and future retinal complications.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded197    
    Comments [Add]    

Recommend this journal