Optic coherence tomography features of subretinal vitreous substitutes

Leandro Cabral Zacharias; Epitácio Dias da Silva Neto; Taurino Dos Santos Rodrigues Neto; José Ronaldo Lima de Carvalho Júnior; Rony Carlos Preti; Leonardo Provetti Cunha; Tatiana Tanaka; Mário Luiz Ribeiro Monteiro

doi:10.1186/s40942-020-00256-7

Optic coherence tomography features of subretinal vitreous substitutes

Int J Retina Vitreous. 2020 Nov 13;6(1):53. doi: 10.1186/s40942-020-00256-7.

Authors

Leandro Cabral Zacharias¹, Epitácio Dias da Silva Neto¹, Taurino Dos Santos Rodrigues Neto², José Ronaldo Lima de Carvalho Júnior¹, Rony Carlos Preti¹, Leonardo Provetti Cunha¹, Tatiana Tanaka¹, Mário Luiz Ribeiro Monteiro¹

Affiliations

¹ Division of Ophthalmology, Medical School, University of São Paulo, Rua, Av. Dr. Enéas Carvalho de Aguiar, 255, Cerqueira César, São Paulo, SP, 05403-000, Brazil.
² Division of Ophthalmology, Medical School, University of São Paulo, Rua, Av. Dr. Enéas Carvalho de Aguiar, 255, Cerqueira César, São Paulo, SP, 05403-000, Brazil. taurinorodrigues@gmail.com.

Abstract

Background: To draw comparisons between spectral domain optic coherence tomography (SD-OCT) features of subretinal silicon oil (SO), perfluoro-n-octane (PFO) or C3F8 gas.

Methods: Cases diagnosed with retained subretinal vitreous substitutes (VS) were retrospectively selected. Demographic data were collected and OCT features were analyzed.

Results: In the 13 cases with subretinal PFO, hyper-reflectivity under the bubble was noted in 8 eyes (61.5%); choroidal shadow at the borders of the bubble in 11 eyes (84.6%); hyper-reflective halo around the bubble in 5 eyes (38.4%) and a hyper-reflective apical dot in 8 eyes (61.5%).The two cases with multiple PFO bubbles had complete septum dividing the bubbles. The one case with subretinal SO had hyper reflectivity under the bubble; no choroidal shadow at the edge of the bubble; hyper-reflective halo was noted around the bubble and the apical hyper-reflective dot was present; there was no complete septum dividing multiple bubbles. The single case with subretinal C₃F₈ had some bubbles with totally round base, incomplete septum, hyper reflectivity under the bubble, choroidal shadow at the edge of the bubble, a hyper-reflective halo and an apical dot.

Conclusion: Different subretinal VS share similar SD-OCT characteristics. Round base bubbles are only observed with subretinal C3F8 gas, while incomplete septum are related to retained subretinal SO or gas.

Keywords: Gas tamponade; Ophthalmologic surgical procedures/methods; Perfluorocarbon liquid; Retinal detachment/surgery; Silicone oils/therapeutic use; Vitrectomy.