Nerve block: Auricular: Difference between revisions
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*Needle, 25-27 gauge | *Needle, 25-27 gauge | ||
*Local anesthetic (e.g. [[lidocaine]] 1%, [[bupivacaine]] 0.25%) | *Local anesthetic (e.g. [[lidocaine]] 1%, [[bupivacaine]] 0.25%) | ||
*Antiseptic (e.g. Betadine, Chlorhexidine, Alcohol) | *Antiseptic (e.g. Betadine, Chlorhexidine, Alcohol) | ||
*Sterile gloves | *Sterile gloves |
Revision as of 00:04, 7 September 2017
Background
- External ear innervated by four sensory nerves
- Greater auricular nerve
- Lesser occipital nerve
- Auricular branch of vagus nerve
- Auriculotemporal nerve
- Provides anesthesia to the entire ear without distorting anatomy
Indications
- Repair of lacerations
- I+D of hematoma or abscess, or other painful procedures involving the external ear
Contraindications
- Infection at injection site
- Allergy to chosen anesthetic
Equipment
- Syringe, 5-10 mL
- Needle, 25-27 gauge
- Local anesthetic (e.g. lidocaine 1%, bupivacaine 0.25%)
- Antiseptic (e.g. Betadine, Chlorhexidine, Alcohol)
- Sterile gloves
- Sterile drape
- Gauze
Technique
Ring block
- Provides anesthesia to entire ear
- Place patient in supine or sitting position
- Disinfect skin at the base and superior aspect of ear using chosen antiseptic
- Insert needle into the skin just inferior to the attachment of the earlobe to the head
- Advance needle just anterior to the tragus, aspirate while advancing
- Inject 2-3 mL of anesthetic while slowly withdrawing needle back to the original injection site
- Redirect and advance needle posterior and superior, aspirating while advancing
- Inject 2-3 mL anesthetic while withdrawing needle
- Remove needle and reinsert just superior to the attachment of the helix to the scalp
- Advance needle just anterior to the tragus, aspirate while advancing
- Inject 2-3 mL anesthetic while withdrawing needle toward to the original puncture site
- Redirect and advance needle posterior to the ear
- Inject 2-3 mL anesthetic while withdrawing needle
Complications
- Infection
- Allergic reaction
- Hematoma
- Inadequate anesthesia
- Cannulation of superficial temporal artery (located medial to the ear, crosses over zygomatic arch)
- Hold firm pressure with gauze for at least 20-30 minutes
See also
Nerve and regional nerve blocks (main)
External links
References
Hutchens, D. J. (2017, May 5). Ear Anesthesia. Medscape. Retrieved 9/6/2017 from http://emedicine.medscape.com/article/82698-overview#a7 Tintinalli, J. E., & Stapczynski, J. S. (2011). Tintinalli's emergency medicine: A comprehensive study guide. New York: McGraw-Hill. 7th ed. pp. 281.