The Complete and Two-Turn Cochlear Duct Length Among Filipinos

Authors

  • Raiza Michaella A. Kasilag, MD Ospital ng Maynila Medical Center https://orcid.org/0000-0003-2569-9287
  • Kathrina Aquino-Diaz, MD Ospital ng Maynila Medical Center

Keywords:

cochlea, cochlear duct length, two-turn length, high-resolution computed tomography (HRCT)

Abstract

ABSTRACT
Objective: This study aims to measure the complete and two-turn cochlear duct lengths in a Filipino population using archived CT scan images.

Methods:

Design: Retrospective Review of Records

Setting:Tertiary Government Training Hospital

Participants: CT Scan Images of 255 patients

Cochlear images of patients who underwent cranial, facial, orbital, paranasal sinus and temporal bone CT scans from January 2019 to December 2019 were analyzed. Coronal oblique images from 3D multiplanar reconstructions were obtained and a single linear measurement (‘A’ value) was used as the spiral coefficient to calculate the complete cochlear duct length (CDL) and two- turn length (2TL).

Results: A total of 510 cochlear images were obtained from the CT scan images of 255 subjects (143 males, 112 females aged 1 to 81 years; mean age = 47 years). The mean ‘A’ value was 8.81 mm (SD = 0.20). The mean complete cochlear duct length was 32.68 mm (31.01 mm – 35.50 mm; SD = 0.834) while the mean two-turn cochlear duct length was 29.61 mm (28.14 mm – 32.08 mm; SD = 0.732). The complete and two-turn cochlear duct lengths in males were found to be significantly longer than in females (p = .001). No significant difference was found between cochlear measurements for left and right ears.

Conclusion: The mean complete cochlear duct length among Filipinos in our study measures 32.68 mm while the mean two-turn cochlear duct length measures 29.61mm. Both complete and two-turn cochlear duct lengths were longer among Filipino males than among females.

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Published

2022-11-15

How to Cite

1.
Kasilag, MD RM, Aquino-Diaz K. The Complete and Two-Turn Cochlear Duct Length Among Filipinos. Philipp J Otolaryngol Head Neck Surg [Internet]. 2022 Nov. 15 [cited 2022 Dec. 6];37(2):16. Available from: https://pjohns.pso-hns.org/index.php/pjohns/article/view/2027