title: Safety and usefulness of an electric knife during surgery for parotid benign tumor: postoperative facial paresis and its risk factors.
abstract: CONCLUSIONS
  The incidence of facial nerve paresis was not high compared with previously reported incidences using conventional operative techniques, showing the safety of the use of an electric knife in this operative technique. An electric knife is provided in almost all operating rooms and no special apparatus is necessary for this technique.
  
  
  BACKGROUND
  Since the glandular tissue of the parotid gland is rich in blood flow, safe and accurate protection of the nerve is often made difficult due to bleeding during parotid surgery. Therefore, we developed a technique in which glandular tissue is cut using an electric knife, which is provided in almost all operating rooms.
  
  
  METHODS
  In this study, the safety and usefulness of an electric knife in parotid surgery were confirmed by evaluating patients with parotid benign tumor who underwent surgery using an electric knife. The subjects were 135 patients with parotid benign tumors.
  
  
  RESULTS
  Postoperative facial nerve paresis developed in 36 (26.6%) of the 135 patients but was transient in all cases. Depending on the tumor site, transient paresis was observed in 8 of the 13 patients with tumors in the deep lobe but in 28 (22.9%) of the 122 patients with tumors in the superficial lobe. The mean recovery time from facial nerve paresis was 6.1 weeks.
authors: Department of Otolaryngology, Osaka Medical College, Osaka, Japan. oto034@poh.osaka-med.ac.jp
authors: Ryo
authors: R
authors: Kawata
authors: Kotetsu
authors: K
authors: Lee
authors: Michitoshi
authors: M
authors: Araki
authors: Hiroshi
authors: H
authors: Takenaka
mesh_terms: D000235:Adenolymphoma / Q000601:surgery; D008949:Adenoma, Pleomorphic / Q000601:surgery; D016063:Blood Loss, Surgical; D004564:Electrocoagulation / Q000379:methods*; D005158:Facial Paralysis / Q000209:etiology / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007430:Intraoperative Care; D008297:Male; D008875:Middle Aged; D010306:Parotid Gland / Q000601:surgery; D010307:Parotid Neoplasms / Q000601:surgery*; D020127:Recovery of Function; D012307:Risk Factors