Título / Title

OCULAR CHANGES CAUSED BY SILICONE OIL IN PATIENTS WITH PREVIOUS RETINAL DETACHMENT AFTER 6 MONTHS FOLLOW–UP

Introdução / Purpose

The purpose of this study was to evaluate the anatomical and functional results, as well as the complications related to the use of silicone oil in a specialized service in vitreoretinal surgery, linked to the Unified Health System of São Paulo, Brazil (SUS).

Material e Método / Methods

Retrospective study using medical records of patients submitted to removal of silicone oil (SO – 5000 cs) from the vitreous cavity and anterior chamber (AC), when necessary, in a tertiary care service of SUS. We included all cases of SO removal, with 6 months postoperative follow-up.
Surgical indications of SO injection were separated into 2 groups: (1) Rhegmatogenous retinal detachment (RRD); (2) Tractional retinal detachment (TRD).

Resultados / Results

One hundred and twenty-two medical records were analyzed and 94 eyes were included.
Group 1 included 45 eyes and group 2 total of 49 eyes. Intraocular pressure (IOP) greater than 25 mmHg was found in 18 eyes (40%) (group 1) and 14 eyes (28.5%) (group 2).
SO emulsification was detected in 17 eyes (37.8%) (group 1) and 11 eyes (22.44%) in group 2, 20 eyes (44.5%) had SO in the AC X 12 eyes (24.5%) in group 2, SO detection in the AC was more evident in cases with emulsified SO and it had a significant difference for both groups (Fisher's exact test; p = 0.0001).
Pale optic disc was found after SO removal in 19 eyes (42.2%) (group 1) and 31 eyes (63.26%) (group 2).

Discussão e Conclusões / Conclusion

Compared with the literature, our study shows excellent anatomical success but with a number of complications similar or even worse in the cases of SO indicated for complex rhegmatogenous retinal detachment (proliferative vitreoretinopathy ≥ C1) and a longer permanency of SO in vitreous chamber. Statistically significant result was found when there was emulsified SO in vitreous cavity and its presence in the anterior chamber.

Palavras Chave

Silicone Oil; Emulsification; Anterior chamber silicone oil; adverse effects; toxicitity; retinal detachment;