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  • Title: Chorda tympani injury during endoscopic versus microscopic stapes surgery: a randomized controlled clinical trial.
    Author: Moneir W, Eladl HM, El-Okda MM, Ebada HA.
    Journal: Eur Arch Otorhinolaryngol; 2023 Feb; 280(2):689-693. PubMed ID: 35871441.
    Abstract:
    OBJECTIVES: The aim of this study was to compare the incidence of chorda tympani nerve (CTN) injury between endoscopic and microscopic stapes surgery. METHODS: This randomized controlled clinical trial included 88 patients who were randomly divided into two groups: endoscopic stapedotomy group (n = 44) and microscopic stapedotomy group (n = 44). The incidence of chorda tympani nerve (CTN) injury after surgery was determined by both subjective taste testing and chemical taste tests, before and after surgery. The results were compared between the two groups. RESULTS: The total number of patients who were identified as having CTN affection (based on the chemical testing) was 16 out of 88 (18.2%). The incidence was significantly lower in the endoscopic group (n = 2) than the microscopic group (n = 14) (p = 0.019). CONCLUSION: Altered taste as a result of iatrogenic CTN injury can affect the patients' quality of life. Endoscopic ear surgery offers better visualization, less need for extensive manipulation of the chorda tympani, and consequently decreased incidence of CTN injury.
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