Table 1.
General data for all participants.
Figure 1.
Surgical procedures for a minimal invasive approach of cochlear implantation aiming for immediate initial mapping.
(A) After draping and sterilization, a 2.5 to 3 cm skin incision was made in the post-auricular region at a distance of about 2 cm away from the posterior wall of external ear canal. (B) To avoid possible tissue injuries, four custom-made hooks instead of self-retain instrument (e.g. mastoid retractor) were used to expose the cortex of mastoid bone. (C) A thin piece of cortex bone (about 10×10×3 mm in size) harvested before the mastoidectomy was used as a shielding coverage for the protection of the wire inside mastoid cavity.
Table 2.
Rates of complications.
Figure 2.
Variations of impedance (left column) and electrical compound action potential (ECAP; right column) measured intra-operatively and within 24 hours post-operatively.
(A) Impedance and ECAP results of all channels. (B) Impedance and ECAP results of selected channels (no 1, 6, 11, 16, and 22). Impedance and ECAP both became significantly lower measured within 24 hours post-operatively than those measured intra-operatively.
Table 3.
Impedance for all participants.
Table 4.
Electrically evoked compound action potential (ECAP) for all participants.
Table 5.
Hearing for all participants.