The validity of bispectral index values from a dislocated sensor: a comparison with values from a sensor located in the commercially recommended position.
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.
Horiuchi
Toshinori
T
Department of Anesthesiology, Nara Medical University, Nara, Japan.
Kawaguchi
Masahiko
M
Kurita
Naoko
N
Inoue
Satoki
S
Furuya
Hitoshi
H
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
D018686:Anesthetics, Intravenous; D015742:Propofol