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Round Window/Cochleostomy both approaches acceptable round window is the most important landmark is the round window Courtesy Dr. Chang-xue Wang.

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Presentation on theme: "Round Window/Cochleostomy both approaches acceptable round window is the most important landmark is the round window Courtesy Dr. Chang-xue Wang."— Presentation transcript:

1 Round Window/Cochleostomy both approaches acceptable round window is the most important landmark is the round window Courtesy Dr. Chang-xue Wang

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

3 Electrode in the Vestibule! Courtesy of Manohar Bance

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

5 Cochlear Vasculature Courtesy of Peter Roland

6 no bone dust correct scala easier? Cochleostomy vs. Round Window

7 no bone dust correct scala easier? Cochleostomy vs. Round Window

8 Insertion insertion technique round window extended round window cochleostomy Cochleostomy Extended RW Round Window

9 Cochleostomy Extended RW Round Window 290º ± 60 320º ± 28 325º ± 60 Depth of Insertion

10 Current Opinion either approach: identify round window fully is acceptable can preserve hearing

11 Current Opinion round window approach: favoured in thin electrodes cochleostomy: favoured in anomalies pre-curved electrodes


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