Fig. 2From: A spray-as-you-go airway topical anesthesia attenuates cardiovascular responses for double-lumen tube tracheal intubationThe technique of spray-as-you-go airway topical anesthesia. Note: a A FIS with an epidural catheter was inserted into the working channel. One end of the catheter was connected to a syringe containing 2% lidocaine, b the spray on the glottis under the FIS, c The anesthetic was sprayed through the side hole of the epidural catheter, d Spraying of the carina and bronchi under the FISBack to article page