Ultrasound-guided medial branch block of superior laryngeal nerve
nerve block
To disinfect the neck skin, place a linear array probe (MicroTurboHFL38X, Sonosite Company, USA, probe frequency 6-13MHz) covered with ultrasonic protective sleeve transversely between hyoid bone and thyroid cartilage, and gradually slide outward, so that the hyperechoic thyroglossum can be seen in the image, the anechoic superior laryngeal artery can be found in the thyroglossum, and the internal branch of the superior laryngeal nerve has an external hyperechoic structure surrounding the internal hypoechoic structure. 3 ml of 2% lidocaine (Hebei Tiancheng Pharmaceutical Co., Ltd., batch number: H13022313) was injected into the periphery of the superior laryngeal nerve by acupuncture from the middle plane to block the medial branch of the superior laryngeal nerve. Complete the other nerve block in the same way at the same needle insertion point. 