Table 2.
Interscalar excursions between round window and cochleostomy approach.
| Subject | Electrode (1 = Most apical; 12 = Most basal) |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CDL | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | ||
| COCH Group | COCH.1 | 36.3 | ST | NO | NO | NO | ST | NO | ST | ST | ST | ST | ST | ST |
| COCH.2 | 36.8 | ST | NO | NO | NO | ST | ST | ST | ST | ST | NO | ST | ST | |
| COCH.3 | 37.0 | ST | NO | NO | ST | NO | ST | ST | ST | ST | ST | ST | ST | |
| COCH.4 | 36.7 | ST | NO | NO | ST | ST | ST | ST | ST | ST | ST | ST | NO | |
| COCH Group | RW.1 | 36.4 | ST | NO | NO | ST | ST | ST | ST | ST | ST | ST | ST | ST |
| RW.2 | 35.8 | – | ST | NO | ST | ST | ST | ST | ST | ST | ST | ST | ST | |
| RW.3 | 36.4 | ST | NO | ST | ST | ST | ST | ST | ST | ST | ST | ST | ST | |
| RW.4 | 33.4 | ST | ST | ST | ST | NO | ST | ST | ST | ST | ST | ST | ST | |
Note: Electrode positioning outside the scala tympani is more common among the COCH group and predominantly in the most apical third of the electrode array. Abbreviations: RW, Round window approach; COCH, Cochleostomy approach; CDL, Cochlear duct length (in millimeters); ST, Electrode is located within the scala tympani; NO, Electrode is not located within the scala tympani.