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Anesthesia and analgesia · Nov 2012
A method for ultrasonographic visualization and injection of the superior laryngeal nerve: volunteer study and cadaver simulation.
- Balvindar Kaur, Raymond Tang, Andrew Sawka, Claudia Krebs, and Himat Vaghadia.
- Department of Anesthesia, Vancouver Coastal Health, Vancouver, BC V5Z 1M9, Canada. balvindark@gmail.com
- Anesth. Analg.. 2012 Nov 1;115(5):1242-5.
AbstractSuperior laryngeal nerve block is a valuable technique for provision of upper airway anesthesia. In bilateral scans of 20 volunteers, we developed a technique for ultrasonographic visualization of the superior laryngeal nerve and key anatomical structures using a hockey stick-shaped 8 to 15 MHz transducer (HST15 to 8/20 linear probe, Ultrasonix, Richmond, BC, Canada). Subsequently, we simulated superior laryngeal nerve scanning and injection in bilateral injections in 2 cadavers. Ultrasound-guided in-plane advancement of a needle toward the superior laryngeal nerve and injection of 1 mL of green dye was achieved in all 4 attempts and confirmed by a postprocedural dissection performed by an anatomist. We conclude that ultrasound-guided superior laryngeal nerve block in humans may be feasible.
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