Development of a surgical approach for a wide-view suprachoroidal retinal prosthesis: evaluation of implantation trauma

Background Our research goal is to develop a safe, reproducible surgical approach for implantation of a wide-field retinal stimulating array. The aim of this study was to evaluate the pathological response to acute implantation of a functional prototype electrode array in the suprachoroidal space. M...

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Veröffentlicht in:Graefe's archive for clinical and experimental ophthalmology 2012-03, Vol.250 (3), p.399-407
Hauptverfasser: Villalobos, Joel, Allen, Penelope J., McCombe, Mark F., Ulaganathan, Meera, Zamir, Ehud, Ng, David C., Shepherd, Robert K., Williams, Chris E.
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Sprache:eng
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Zusammenfassung:Background Our research goal is to develop a safe, reproducible surgical approach for implantation of a wide-field retinal stimulating array. The aim of this study was to evaluate the pathological response to acute implantation of a functional prototype electrode array in the suprachoroidal space. Methods The surgical techniques to implant a 72 platinum electrode array fabricated on 8 × 13 × 0.4 mm polyimide and silicone substrate were developed in a pilot study in anesthetized cats. For the main study, nine eyes were implanted in vivo and unoperated eyes were used as controls. Surgery consisted of a temporal approach with a full-thickness scleral incision 5 mm posterior to the limbus. A suprachoroidal “pocket” was created, the electrode array inserted to sit beneath the area centralis, and placement was confirmed visually. The eyes were collected subsequently for histopathology. Results The array was consistently inserted into the suprachoroidal space beneath the area centralis in nine eyes. There was a significant hemorrhage in two cases where implantation was complicated by choroidal congestion. Retinal folding occurred only when the array tip was within 2.6 mm of the optic disc ( p  
ISSN:0721-832X
1435-702X
DOI:10.1007/s00417-011-1794-6