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Facial nerve grading after parotidectomy.

Dominik Stodulski1, Andrzej Skorek, Bogusław Mikaszewski

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European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
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Summary

Facial nerve dysfunction is common after parotidectomy. A new Post-Parotidectomy Facial Nerve Grading System (PPFNGS) shows higher interrater agreement than existing scales for assessing facial nerve outcomes.

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Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Facial Nerve Surgery

Background:

  • Facial nerve dysfunction is a frequent complication following parotidectomy.
  • Existing facial nerve grading systems have limited utility in the post-parotidectomy context.
  • Objective assessment of facial nerve function is crucial for patient outcomes.

Purpose of the Study:

  • To compare existing facial nerve grading systems.
  • To introduce and validate a new grading system, the Post-Parotidectomy Facial Nerve Grading System (PPFNGS).
  • To assess the utility of PPFNGS in patients undergoing parotidectomy.

Main Methods:

  • Utilized House-Brackmann, Sydney, and Yanagihara classification systems.
  • Developed the Post-Parotidectomy Facial Nerve Grading System (PPFNGS) based on existing scales.
  • Assessed facial nerve function in 200 patients on postoperative day 1 using all 4 scales by 3 otolaryngologists.

Main Results:

  • Facial nerve deficit was observed in 54 patients (27%).
  • All tested scales showed consistent results.
  • The PPFNGS demonstrated higher interrater agreement compared to the other three scales.

Conclusions:

  • The PPFNGS is a novel, quantitative, and qualitative grading system for post-parotidectomy facial nerve function.
  • PPFNGS offers improved interrater reliability over existing systems.
  • This new system aids in the objective assessment of facial nerve outcomes after parotid surgery.