Pamuk, G.Pamuk, A. E.Akgoz, A.Ozturk, E.Bajin, M. D.Sennaroglu, L.2025-01-212025-01-2120190022-21511748-5460https://doi.org/10.1017/S0022215119001671https://hdl.handle.net/20.500.12587/24120Objective To determine cochlear duct mid-scalar length in normal cochleae and its role in selecting the correct peri-modiolar and mid-scalar implant length. Methods The study included 40 patients with chronic otitis media who underwent high-resolution computed tomography of the temporal bone. The length and height of the basal turn, mid-modiolar height of the cochlea, mid-scalar and lateral wall length of the cochlear duct, and the 'X' line (the largest distance from mid-point of the round window to the mid-scalar point of the cochlear canal) were measured. Results Cochlear duct lateral wall length (28.88 mm) was higher than cochlear duct mid-scalar length (20.08 mm) (p < 0.001). The simple linear regression equation for estimating complete cochlear duct length was: cochlear duct length = 0.2 + 2.85 x X line. Conclusion Using the mid-scalar point as the reference point (rather than the lateral wall) for measuring cochlear duct mid-scalar length, when deciding on the length of mid-scalar or peri-modiolar electrode, increases measurement accuracy. Mean cochlear duct mid-scalar length was compatible with peri-modiolar and mid-scalar implant lengths. The measurement method described herein may be useful for pre-operative peri-modiolar or mid-scalar implant selection.eninfo:eu-repo/semantics/closedAccessCochlear Duct; Cochlear Implantation; Electrodes; Implanted; Radiographic Image Interpretation; Computer-Assisted; Tomography; Spiral ComputedArticle133976476910.1017/S002221511900167131422784WOS:000486323800005Q4