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000887905 1001_ $$0P:(DE-Juel1)165188$$aRincón Montes, V.$$b0
000887905 245__ $$aDevelopment and in vitro validation of flexible intraretinal probes
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000887905 520__ $$aThe efforts to improve the treatment efficacy in blind patients with retinal degenerative diseases would greatly benefit from retinal activity feedback, which is lacking in current retinal implants. While the door for a bidirectional communication device that stimulates and records intraretinally has been opened by the recent use of silicon-based penetrating probes, the biological impact induced by the insertion of such rigid devices is still unknown. Here, we developed for the first time, flexible intraretinal probes and validated in vitro the acute biological insertion impact in mouse retinae compared to standard silicon-based probes. Our results show that probes based on flexible materials, such as polyimide and parylene-C, in combination with a narrow shank design 50 µm wide and 7 µm thick, and the use of insertion speeds as high as 187.5 µm/s will successfully penetrate the retina, reduce the footprint of the insertion to roughly 2 times the cross-section of the probe, and induce low dead cell counts, while keeping the vitality of the tissue and recording the neural activity at different depths.
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000887905 7001_ $$0P:(DE-Juel1)169371$$aGehlen, Jana$$b1$$ufzj
000887905 7001_ $$0P:(DE-HGF)0$$aIngebrandt, S.$$b2
000887905 7001_ $$0P:(DE-HGF)0$$aMokwa, W.$$b3
000887905 7001_ $$0P:(DE-HGF)0$$aWalter, P.$$b4
000887905 7001_ $$0P:(DE-Juel1)131939$$aMüller, Frank$$b5
000887905 7001_ $$0P:(DE-Juel1)128713$$aOffenhäusser, A.$$b6$$eCorresponding author
000887905 773__ $$0PERI:(DE-600)2615211-3$$a10.1038/s41598-020-76582-5$$p19836$$tScientific reports$$v10$$x2045-2322$$y2020
000887905 8564_ $$uhttps://juser.fz-juelich.de/record/887905/files/SN-2020-00398-b.pdf
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