Slide 1

Round Window/Cochleostomy both approaches acceptable round window is the most important landmark is the round window Courtesy Dr. Chang-xue Wang Slide 2 Cochleostomy vs. Round Window bone in round window steeper angle at first turn contact hard to pack/seal destroys the membrane permeability CHL right ear bone in hook region Slide 3 Electrode in the Vestibule! Courtesy of Manohar Bance Slide 4 Cochleostomy vs. Round Window right ear cochleostomy round window bone in round window steeper angle at first turn contact hard to pack/seal destroys the membrane permeability CHL Slide 5 Cochlear Vasculature Courtesy of Peter Roland Slide 6 no bone dust correct scala easier? Cochleostomy vs. Round Window Slide 7 no bone dust correct scala easier? Cochleostomy vs. Round Window Slide 8 Insertion insertion technique round window extended round window cochleostomy Cochleostomy Extended RW Round Window Slide 9 Cochleostomy Extended RW Round Window 290 60 320 28 325 60 Depth of Insertion Slide 10 Current Opinion either approach: identify round window fully is acceptable can preserve hearing Slide 11 Current Opinion round window approach: favoured in thin electrodes cochleostomy: favoured in anomalies pre-curved electrodes