Fig. 3From: Endoscopic-assisted epitympanic approach: a feasible technique for cochlear implantationa Endoscopic view of the right ear showing the start of drilling of bony lip of the RW niche using a 1-mm diamond burr. b, c Endoscopic view of the right ear showing opening of the ST by gentle removal of the RW membrane using a fine hook. d Endoscopic view of right ear showing the drilled-out RW niche and the opened STBack to article page