Resumen de High definition tomography to evaluate filtering bleb with biodegradable collagen implant in patients with high myopia

Verónica Ribas González, L. Fernández-Vega Cueto, Sebastián Banegas Argota, Mª Isabel Canut

• PURPOSE: The aim of this study was to identify, by means of computed tomography, the height of the filtering bleb and Ologen® implant in patients with high myopia, in whom the use of mitotic inhibitors in filtering surgery could cause complications.

  SETTING: Barraquer Ophthalmology Centre, Barcelona, Spain.

  METHODS: A retrospective descriptive study of 10 patients (10 eyes) diagnosed with chronic open-angle glaucoma and high myopia. Patients underwent trabeculectomy with Ologen® implant, without mitomycin, with follow-up at one, three, six and nine months. Follow-up assessment included refraction, intraocular pressure (IOP), presence of complications, and examination of the bleb and implant using high-resolution tomography.

  RESULTS: Ten eyes with a mean spherical equivalent of −13.61 ± 5.22 D from ten patients (men: women, 3:7) were studied. Preoperative IOP fell significantly from 27.11 ± 7.51 mmHg to 11.21 ± 3.43, 12.16 ± 3.16, 13.91 ± 2.18, and 13.67 ± 0.81 mmHg at one, three, six and nine months, respectively. Mean bleb height was 1.78 ± 0.26, 1.57 ± 0.25, 1.54 ± 0.38 and 1.42 ± 0.29 mm, and that of the implant was 1.46 ± 0.13 mm, 1.23 ± 0.21, 0.87 ± 0.17 and 0.47 ± 0.22 mm at one, three, six and nine months, respectively. No severe complications were observed.

  CONCLUSION: The combination of filtering surgery and Ologen® in patients with scleral thinning and high myopia significantly reduces IOP. In some cases, high-resolution tomography can be a useful tool for measuring bleb height and thickness of the implant.