Anesthesia of the airway by aspiration of lidocaine

Efficacy of oropharyngeal lidocaine instillation on hemodynamic responses to orotracheal intubation

“…Lidocaine solution (10-12 mL) administered on the back of the tongue of an awake patient was partially swallowed initially but ultimately it pooled in the pharynx and overflowed into the trachea [9]. We instilled lidocaine 45 seconds after giving the anesthetic induction bolus.…”

“…It was found that the lidocaine solution could pool in the pharynx and then flow over the interarytenoid notch into the trachea [9]. We investigated whether this topical technique modified hemodynamic responses to intubation in daily anesthetic practice.…”

“…Lidocaine instilled onto the back of the tongue provides effective topical anesthesia for awake fiberoptic intubation [9,10]. It was found that the lidocaine solution could pool in the pharynx and then flow over the interarytenoid notch into the trachea [9].…”

Vocalization Assessed by Electrolaryngography Is Unaffected by Topical Lidocaine Anesthesia

“…Authors have described using supraglottic techniques alone for tracheal intubation, and in our practice we commonly find that subglottic anesthesia is achieved by gargling. 17 Supraglottic techniques might be expected to spare the recurrent laryngeal nerve, which is the primary source of motor innervation of the larynx. However, laryngeal innervation is not always consistent.…”

Airway regional anesthesia for awake fiberoptic intubation☆

“…An interesting investigation of anesthetizing the airway by aspiration of lidocaine has been published by Chung et al 25 Their method involved the slow dripping of an anesthetic solution onto the tongue of a supine subject. First, two 5-cc aliquots of 2% lidocaine were gargled for 1 minute each.…”