Fig. 18.1
VHVS and MRI images of the expected location of the auricular branch of the vagus nerve (nerve of Arnold)
Fig. 18.2
Patient positioning and surface landmarks for nerve of Arnold block
The tragus of the ear is identified and pulled forward.
18.2.3 Needle Insertion Technique
A 30G needle is inserted into the posterior tragus, approximately 45° to the horizontal (Fig. 18.3).
Fig. 18.3
Surface anatomy and needle direction for nerve of Arnold block
18.2.4 Local Anesthetic Application
Inject local anesthetic solution (e.g., 0.2–0.3 mL of 0.25 % bupivacaine with epinephrine 1: 200,000 or 0.2–0.3 mL of 2 % lidocaine with epinephrine 1: 200,000) after aspiration.Related posts:
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