Definition of Metrics to Evaluate Cochlear Array Insertion Forces Performed with Forceps, Insertion Tool, or Motorized Tool in Temporal Bone Specimens
Figure 4
Insertion force profile and jerk of a 1J array with 3 different insertion techniques in the same temporal bone. (a) Manual insertion with microforceps claws tool, (b) insertion with Hifocus 1J electrode insertion tool, and (c) insertion with an in-house motorized tool. Left pictures ((a1), (b1), and (c1)): insertion forces profiles. Dashed line represents 0.1 N threshold. Peak forces were around 0.3 N for the three insertion techniques. Right pictures ((a2), (b2), and (c2)): jerk. Hifocus 1J electrode insertion tool provided smoother insertion with little jerk compared to manual insertion with forceps. This benefit is even more increased with a motorized tool.
