Semiautomatic Cochleostomy Target and Insertion Trajectory Planning for Minimally Invasive Cochlear Implantation

Table 2

DCA target accuracy and insertion results.

No.	Target accuracy (mm)	Insertion time (min)	Intracochlear contacts	Angular insertion depth (°)	Implanted scala
1L	0.79*	5	8 of 12	270	SV
1R	0.60*	5	10 of 12	330	ST
2L	0.07	5	7 of 12	210	ST
2R	0.15	2	8 of 12	300	ST
3L	0.05	5	12 of 12	420	ST
3R	0.33*	2	11 of 12	360	ST
4L	0.28	5	8 of 12	290	ST
4R	0.24	7	9 of 12	360	ST
5L	0.27*	5	11 of 12	300	ST
5R	0.22	4	12 of 12	350	ST
Avg. ± SD	0.30 ± 0.23	5 ± 2	10 ± 2	319 ± 58

SV: scala vestibule; ST: scala tympani; *cases with broken screws which caused varying degrees of error in the registration.