Presentation is loading. Please wait.

Presentation is loading. Please wait.

Round Window/Cochleostomy

Similar presentations


Presentation on theme: "Round Window/Cochleostomy"— 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 stapes tendon bone in hook region

3 Electrode in the Vestibule!
Courtesy of Manohar Bance

4 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 cochleostomy round window

5 Courtesy of Peter Roland
Cochlear Vasculature Courtesy of Peter Roland

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

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

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

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

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

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


Download ppt "Round Window/Cochleostomy"

Similar presentations


Ads by Google