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. 2020 Nov 20;15(11):e0241834. doi: 10.1371/journal.pone.0241834

Fig 3. Ultrasound image of iSLN block.

Fig 3

(A) Hyoid bone and thyroid cartilage were marked in the ultrasound image. (B) The red dotted line and yellow circle represented thyrohyoid membrane and superior laryngeal nerve respectively. (C) The white arrow represented the needle path.