Lidocaine spray used to capture a live Clinostomum parasite causing human laryngitis.

This case report describes a patient who developed Clinostomum laryngitis after eating raw fresh-water fish. Parasite removal was performed under general anesthesia using a laryngomicroscopic method. Because it was difficult to capture the worm intact using forceps, it was sprayed with 8% lidocaine solution. This immediately inhibited peristaltic movement of the parasite allowing easy retrieval without tearing any part of the organism, thus facilitating parasite identification.