Individual Optimization of the Insertion of a Preformed Cochlear Implant Electrode Array

Figure 8

Examples of different kinds of contour damage/intersection. (a) Without contact between electrode array and cochlear contour (grade 0). (b) Trauma risk grade II with both penetration of the electrode tip into the inner wall and overlapping of the silicone body with the outer wall. In fact, both lead to relevant contact forces inside the inner ear. (c) Extensive contour damage which results in the highest risk of causing an insertion trauma (grade IV).