Flavored anesthetic lozenge versus Xylocaine spray used as topical pharyngeal anesthesia for unsedated esophagogastroduodenoscopy: a randomized placebo-controlled trial

摘要

Background The use of Xylocaine spray has been the common practice in many endoscopy centers, but scientific evidence is not conclusive on its superiority over other forms of topical anesthesia. This study aimed to compare the effectiveness of Xylocaine spray as a topical pharyngeal anesthesia for upper endoscopy and that of anesthetic lozenges with a characteristic flavor.