Variation and protection of the chorda tympani nerve in endoscopic ear surgery.

ABSTRACT:

Objective

To observe and summarize variations of the chorda tympani nerve to effectively protect it during surgery.

Methods

Surgical videos of patients undergoing endoscopic ear surgery in the past 3 years were retrospectively observed to identify chorda tympani nerve variations.

Results

In total, 237 cases were reviewed. The tympanic sulcus or annulus was the boundary between the posterior wall of the external auditory canal and chordal eminence (CE). The chorda tympani nerve was divided into three types: type I, the periannular segment was located medial to the CE and covered by the bony eminence (32.5%); type II, the periannular segment was located inferior to the CE, and the nerve did or did not contact the bony edge of the CE (62.0%); and type III, the periannula

SUBMITTER: Quancheng L 

PROVIDER: S-EPMC9392398 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature