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Transcutaneous Ultrasound for Localizing the Mental Foramen-A Potential Application for Transoral Endoscopic Thyroidectomy With Vestibular Approach

摘要


Background: Mental nerve injury is a specific complication of transoral endoscopic thyroidectomy with vestibular approach (TOETVA). Transcutaneous ultrasound may be a good tool to identify the mental foramens to avoid mental nerve injury. Methods: A 7-18 MHz linear array transducer was placed transversely on the chin in a transversely anterior and side views focusing on the outer cortex of the mandible. The gray-scale technique was used, with the scan setting for the thyroid gland. Results: Between September 2019 and February 2020, 194 patients with thyroid nodules were enrolled when receiving thyroid sonography, including 38 men and 156 women. The mean age was 56 years old (25-87). Transcutaneous ultrasound clearly identified bilateral mental foramens in all but one patient. Conclusions: Transcutaneous ultrasound can identify the location of the mental foramen and may be helpful to design the incision of the vestibule during TOETVA to avoid mental nerve injury.

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