title: The validity of bispectral index values from a dislocated sensor: a comparison with values from a sensor located in the commercially recommended position.
abstract: BACKGROUND
  The influence of sensor dislocation on bispectral index (BIS) values is not clear. We compared the BIS values obtained from dislocated sensors with those from the commercially recommended positions.
  
  
  METHODS
  We used two BIS sensors for each patient receiving propofol-based anesthesia; one in the recommended position and one positioned around the lateral corner of the right eye.
  
  
  RESULTS
  Bland and Altman analysis revealed better agreement of two BIS values when the values during induction of and emergence from anesthesia were excluded.
  
  
  CONCLUSIONS
  The results indicate that during induction of and emergence from general anesthesia, a dislocated BIS sensor may produce questionable BIS values.
authors: Department of Anesthesiology, Nara Medical University, Nara, Japan.
authors: Toshinori
authors: T
authors: Horiuchi
authors: Masahiko
authors: M
authors: Kawaguchi
authors: Naoko
authors: N
authors: Kurita
authors: Satoki
authors: S
authors: Inoue
authors: Hitoshi
authors: H
authors: Furuya
mesh_terms: D000328:Adult; D000368:Aged; D000762:Anesthesia Recovery Period; D000768:Anesthesia, General; D018686:Anesthetics, Intravenous; D004566:Electrodes; D004569:Electroencephalography / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000295:instrumentation*; D017410:Practice Guidelines as Topic; D015742:Propofol; D015203:Reproducibility of Results
chemical_list: D018686:Anesthetics, Intravenous; D015742:Propofol