Elsa Erixon1, Helge Rask-Andersen. 1. Department of Surgical Sciences, Section of Otorhinolaryngology and Head and Neck Surgery, Uppsala University , Uppsala , Sweden.
Abstract
CONCLUSIONS: The basal turn diameter of the human cochlea predicts the outer wall length of the basal and two first turns relatively well but there was less correlation for the total cochlear length. The linear regression graph defines the length of the basal turn within an error of ± 1 mm and could be used clinically to distinguish small and large cochleae. OBJECTIVE: The human cochlea varies in size. The preoperative assessment of cochlear length can be crucial for non-traumatic electrode insertion and hearing preservation. In this study, we estimated the external cochlear wall length by assessing the basal turn diameter. METHODS: A total of 51 non-selected, human inner ear moulds were analysed. A line was drawn from the midpoint of the round window through the cochlear mid-portion to the opposite side (A) and correlated to the cochlear turn lengths. Linear regression analyses were carried out. RESULTS: Mean diameter A was 9.3 mm. The mean basal turn length was 22.8 mm, the two first turns were 35.1 mm and the total length was 41.2 mm. Linear regression analyses indicated a coefficient of determination (R(2)) of 0.74 for diameter A and the basal turn length, R(2) = 0.70 for the two-turn length and R(2) = 0.39 for the total length.
CONCLUSIONS: The basal turn diameter of the human cochlea predicts the outer wall length of the basal and two first turns relatively well but there was less correlation for the total cochlear length. The linear regression graph defines the length of the basal turn within an error of ± 1 mm and could be used clinically to distinguish small and large cochleae. OBJECTIVE: The human cochlea varies in size. The preoperative assessment of cochlear length can be crucial for non-traumatic electrode insertion and hearing preservation. In this study, we estimated the external cochlear wall length by assessing the basal turn diameter. METHODS: A total of 51 non-selected, human inner ear moulds were analysed. A line was drawn from the midpoint of the round window through the cochlear mid-portion to the opposite side (A) and correlated to the cochlear turn lengths. Linear regression analyses were carried out. RESULTS: Mean diameter A was 9.3 mm. The mean basal turn length was 22.8 mm, the two first turns were 35.1 mm and the total length was 41.2 mm. Linear regression analyses indicated a coefficient of determination (R(2)) of 0.74 for diameter A and the basal turn length, R(2) = 0.70 for the two-turn length and R(2) = 0.39 for the total length.
Authors: H Martin Kjer; Jens Fagertun; Wilhelm Wimmer; Nicolas Gerber; Sergio Vera; Livia Barazzetti; Nerea Mangado; Mario Ceresa; Gemma Piella; Thomas Stark; Martin Stauber; Mauricio Reyes; Stefan Weber; Marco Caversaccio; Miguel Ángel González Ballester; Rasmus R Paulsen Journal: Int J Comput Assist Radiol Surg Date: 2018-01-06 Impact factor: 2.924
Authors: G Jakob Lexow; Marcel Kluge; Nils-Claudius Gellrich; Thomas Lenarz; Omid Majdani; Thomas S Rau Journal: Eur Arch Otorhinolaryngol Date: 2018-03-12 Impact factor: 2.503
Authors: Johannes Taeger; Franz Tassilo Müller-Graff; Lukas Ilgen; Phillip Schendzielorz; Rudolf Hagen; Tilman Neun; Kristen Rak Journal: OTO Open Date: 2021-09-24
Authors: Jing Zou; Jaakko Lähelmä; Juha Koivisto; Anandhan Dhanasingh; Claude Jolly; Antti Aarnisalo; Jan Wolff; Ilmari Pyykkö Journal: Acta Otolaryngol Date: 2015-02-13 Impact factor: 1.494
Authors: Nicolas Gerber; Mauricio Reyes; Livia Barazzetti; Hans Martin Kjer; Sergio Vera; Martin Stauber; Pavel Mistrik; Mario Ceresa; Nerea Mangado; Wilhelm Wimmer; Thomas Stark; Rasmus R Paulsen; Stefan Weber; Marco Caversaccio; Miguel A González Ballester Journal: Sci Data Date: 2017-09-19 Impact factor: 6.444