Posters

Short-term results, complications and learning-curve analysis of Preserflo Microshunt implant for open-angle glaucoma surgery

Poster Details

First Author: M.Ibarz Barbera SPAIN

Co Author(s):    J. Rodriguez-Prats   P. Taña Rivero                 

Abstract Details

Purpose:

To describe our experience with the first 30 cases of glaucoma surgery with Preserflo Microshunt in terms of safety, efficacy and learning-curve.

Setting:

Oftalvist Madrid, Hospital Universitario Moncloa.

Methods:

28 eyes of 28 primary open angle glaucoma patients where included in this prospective study. All surgeries where conducted by the same surgeon, with an ab-externo approach through an scleral tunnel 3 mm away from the limbus and 2 minutes 0.2 mg/ml sub-tenon mitomycin C. Preserflo Microshunt was placed in the sub-tenon space in all cases verifying aqueous flow by injecting BSS with a 23 G cannula. IOP, endothelial count, intra and post-op complications, and OCT (Optovue) measurements of tube position in the anterior chamber and size and shape of the blebs where analyzed.

Results:

Mean IOP values varied from pre-op 21,7±6,3, to 24 hours 9,2±2,6, one week 10,1±6,5, one month 10,5±1,8, 3 months 11,0±2,0 mmHg (p<0,0001). Endothelial cell count remained stable, basal 2353,3±531,2, one month 2093±623,4, 3 months 2165±260,9. Correlation analysis showed a high, positive and statistically significant correlation between basal, one month (r=0,813, p<0,0001) and 3 months (r=0,849, p=0,033). Complications encountered where: early hypertension 7%, Hypotony 10,7%, tenon cyst 3,5%, late hypertension (2 months) 3,5%, intra-op hyphema 3,5%. Tube position in the anterior chamber was lower than 200 microns from the endothelium in 3 cases and there was iris-tube contact in 2 cases.

Conclusions:

Glaucoma surgery with Preserflo Microshunt implanted in the sub-tenon space with the use of mytomicin C seems to be a repeatable, safe and effective procedure with a low rate of complications and an acceptable learning curve in terms of tube position in the anterior chamber.

Financial Disclosure:

None