title: [Application of computer assisted navigation system in endoscopic sinus and skull base surgery].
abstract: OBJECTIVE
  To evaluate the applicative value of computer assisted navigation system in endoscopic sinus and skull base surgery.
  
  
  METHODS
  Forty-nine endoscopic surgery procedures were performed with the help of computer assisted navigation system, among which there were 25 cases of recurrent sinusitis and nasal polyps, 9 cases of nasal and sinus tumour, 7 cases of cerebrospinal fluid rhinorrhea, 2 cases of meningoencephalocele, 4 cases of congenital choanal atresia, 1 case of pituitary tumor and 1 case of foreign body in middle cranial fossa.
  
  
  RESULTS
  The preoperative time was 5-13 minutes for preparation, 7 minutes in average. The target error was less than or equal to 1.5 mm. All the 49 cases had successful surgery without complications.
  
  
  CONCLUSIONS
  Computer assisted navigation system can help the surgeon to determine the sinus, skull base and adjacent anatomic landmarks correctly, improve surgical accuracy and safety, and reduce intraoperative and postoperative complications.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, 200092, China.
authors.forename: Lan
authors.initials: L
authors.lastname: Cheng
authors.forename: Rongping
authors.initials: R
authors.lastname: Cao
authors.forename: Guozhen
authors.initials: G
authors.lastname: Meng
authors.forename: Qi
authors.initials: Q
authors.lastname: Huang
authors.forename: Dongming
authors.initials: D
authors.lastname: Hou
authors.forename: Lingxiang
authors.initials: L
authors.lastname: Hu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003199:Computer Systems; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D010256:Paranasal Sinuses / Q000601:surgery*; D019291:Skull Base / Q000601:surgery*; D025321:Surgery, Computer-Assisted / Q000379:methods*; D055815:Young Adult