Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma

Michael I Seider, Paul Hahn Duke University Eye Center, Durham, NC, USA Introduction: The Argus II retinal prosthesis may improve visual function in patients with severe vision loss from retinitis pigmentosa. Optimal centration of the electrode array over the macula is important to achieve optimal...

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Autores principales:	Seider MI, Hahn P
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2015
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/fdba60cafb6141f4837a6a72f8d80b1a
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spelling	oai:doaj.org-article:fdba60cafb6141f4837a6a72f8d80b1a2021-12-02T01:51:39ZArgus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma1177-5483https://doaj.org/article/fdba60cafb6141f4837a6a72f8d80b1a2015-11-01T00:00:00Zhttps://www.dovepress.com/argus-ii-retinal-prosthesis-malrotation-and-repositioning-with-intraop-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Michael I Seider, Paul Hahn Duke University Eye Center, Durham, NC, USA Introduction: The Argus II retinal prosthesis may improve visual function in patients with severe vision loss from retinitis pigmentosa. Optimal centration of the electrode array over the macula is important to achieve optimal visual results. Argus tack malrotation is a novel entity that may be encountered during placement, especially in patients with posterior staphyloma.Methods: Retrospective case review.Results: During tacking of the electronics array a clockwise rotation occurred resulting in malposition. We hypothesize this was secondary to undue rotation or posterior pressure applied during tack insertion in conjunction with placement over a previously unrecognized posterior staphyloma. Intraoperative optical coherence tomography, because of the cross-sectional images provided, was helpful in visualizing the distance between the electronics array and the retina, which was difficult to assess using the surgical microscope alone. Repositioning was achieved by adjusting the tack without removal. The patient experienced an improvement in vision as a result of the surgery.Conclusion: Malrotation may occur when tacking the Argus II prosthesis, and the presence of a posterior staphyloma may increase this risk. It is important to differentiate malrotation from tack misplacement – the former may be addressed with array unrotation or partial tack withdrawal and the latter may require tack removal and reinsertion. Also, intraoperative optical coherence tomography may be helpful in characterizing electronics array position during surgery. Keywords: Argus, retinitis pigmentosa, retinal tackSeider MIHahn PDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2015, Iss default, Pp 2213-2216 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Seider MI Hahn P Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma
description	Michael I Seider, Paul Hahn Duke University Eye Center, Durham, NC, USA Introduction: The Argus II retinal prosthesis may improve visual function in patients with severe vision loss from retinitis pigmentosa. Optimal centration of the electrode array over the macula is important to achieve optimal visual results. Argus tack malrotation is a novel entity that may be encountered during placement, especially in patients with posterior staphyloma.Methods: Retrospective case review.Results: During tacking of the electronics array a clockwise rotation occurred resulting in malposition. We hypothesize this was secondary to undue rotation or posterior pressure applied during tack insertion in conjunction with placement over a previously unrecognized posterior staphyloma. Intraoperative optical coherence tomography, because of the cross-sectional images provided, was helpful in visualizing the distance between the electronics array and the retina, which was difficult to assess using the surgical microscope alone. Repositioning was achieved by adjusting the tack without removal. The patient experienced an improvement in vision as a result of the surgery.Conclusion: Malrotation may occur when tacking the Argus II prosthesis, and the presence of a posterior staphyloma may increase this risk. It is important to differentiate malrotation from tack misplacement – the former may be addressed with array unrotation or partial tack withdrawal and the latter may require tack removal and reinsertion. Also, intraoperative optical coherence tomography may be helpful in characterizing electronics array position during surgery. Keywords: Argus, retinitis pigmentosa, retinal tack
format	article
author	Seider MI Hahn P
author_facet	Seider MI Hahn P
author_sort	Seider MI
title	Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma
title_short	Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma
title_full	Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma
title_fullStr	Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma
title_full_unstemmed	Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma
title_sort	argus ii retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma
publisher	Dove Medical Press
publishDate	2015
url	https://doaj.org/article/fdba60cafb6141f4837a6a72f8d80b1a
work_keys_str_mv	AT seidermi argusiiretinalprosthesismalrotationandrepositioningwithintraoperativeopticalcoherencetomographyinaposteriorstaphyloma AT hahnp argusiiretinalprosthesismalrotationandrepositioningwithintraoperativeopticalcoherencetomographyinaposteriorstaphyloma
_version_	1718402876815966208

Argus II retinal prosthesis malrotation and repositioning with intraoperative optical coherence tomography in a posterior staphyloma

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