Enhancement of ethanol on percutaneous permeation and topical anaesthesia of tetracaine gel Objective To study the feasible application of Lining germ to intratracheal surface anesthesia in rats. 乙醇对丁卡因凝胶透皮和局麻作用的影响目的研究利宁凝胶(1%丁卡因凝胶)在气管插管全身麻醉时用于气管粘膜表面麻醉的可行性。