JVD 2019 #1 Ultrasound-Guided Inferior Alveolar Nerve Block in the Horse: Assessment of the Extraoral Approach in Cadavers Jessica Purefoy Johnson

Question 1

Blinded techniques for inferior alveolar nerve blocks & success rates (prev study)

Answer 1

intraoral (100%), angled (73%)& vertical (59%)

Question 2

Study- assessment by CT & dissection success rates for extraoral US-guided IA block

Answer 2

Assessment by CT and dissection determined success rates of 81.3% and 68.8%, respectively; 68.8% of injections had inadvertent methylene blue dye staining of the lingual nerve.

Question 3

Take-homes

Answer 3

Technique with US was no more accurate than blinded techniques.
Any extraoral approach to the IAN is likely to also desensitize the lingual nerve.