Stanislas Ballivet de Régloix - Department of Otorhinolaryngology – Head and Neck Surgery, Military Training Hospital Percy ۱۰۱, avenue Henri Barbusse ۹۲۱۴۰ Clamart, France.
Julia Grinholtz Haddad - Department of Otorhinolaryngology – Head and Neck Surgery, Versailles Hospital Center, André Mignot Hospital ۱۷۷, rue de Versailles ۷۷۱۵۷ Le Chesnay cedex, France.
Olga Maurin - Department of Otorhinolaryngology – Head and Neck Surgery, Military Training Hospital Percy ۱۰۱, avenue Henri Barbusse ۹۲۱۴۰ Clamart, France.
Louise Genestier - Department of Otorhinolaryngology – Head and Neck Surgery, Military Training Hospital Val de Grâce۷۴, boulevard de Port Royal ۷۵۰۰۵ Paris, France.

Introduction: We present a retrospective two-center study series and discussion of the current literature to assess the benefits of facial nerve monitoring during parotidectomy. Materials and Methods: From 2007 to 2012, 128 parotidectomies were performed in 125 patients. Of these, 47 procedures were performed without facial nerve monitoring (group 1) and 81 with facial nerve monitoring (group 2). The primary endpoint was the House-Brackmann classification at 1 month and 6 months. Facial palsy was determined when the House-Brackmann grade was 3 or higher. Results: In group 1, 15 facial palsies were noted; 8 were transient and 7 were definitive. In group 2, 19 facial palsies were noted; 12 were transient and 7 were definitive. At both one and six months after parotidectomy, the rate of facial palsy in reoperation cases was significantly higher in group 1 than in group 2. Conclusion: Facial nerve monitoring is a simple, effective adjunct method that is available to surgeons to assist with the functional preservation of the facial nerve during parotid surgery. Although it does not improve the facial prognosis in first-line surgery, it does improve the facial prognosis in reoperations.

Facial Nerve, Facial paralysis, Intraoperative Monitoring, Parotid gland, Reoperation