목적: The purpose of this study was to evaluate factors related to tunneling time in transoral robotic thyroidectomy via the vestibular approach (TORTVA). 방법:Between October 2023 and December 2024, we retrospectively analyzed 33 patients who underwent TORTVA. Various lengths and angles potentially related to the tunneling pathway were measured on the sagittal plane of the patients’ neck CTs and analyzed to determine their correlation with tunneling time. 결과:The average tunneling time was 25.3 ± 8.2 minutes, with no significant difference observed between males (n = 11, 25.6 ± 8.1 minutes) and females (n = 22, 25.2 ± 8.4 minutes) (P = .925). In multivariate linear regression analysis, the skin-to-thyroid cartilage notch thickness (tST) (B = 0.550, P = .024) and the mentum-to-thyroid cartilage notch distance (dMT) (B = 0.347, P = .028) were significantly associated with tunneling time (P = .006). 결론:Tunneling time showed a significant correlation with the thickness of the skin over the thyroid cartilage notch and the distance between the mentum and the thyroid cartilage notch. These insights could be particularly valuable for surgeons new to TORTVA, as they may help refine patient selection criteria and optimize surgical planning.