during fentanyl or sufentanil anesthesia , both techniques revealed a general decrease in frequency , shown by the aperiodic analysis primarily as a marked increase in the very low frequency range : an increase in the 1-hz bin ( tp1 , in muv2 ) from 2.80 x 10 ( 4 ) +/- 3.20 x 10 ( 4 ) ( sd ) to 45.1 x 10 ( 4 ) +/- 27.2 x 10 ( 4 ) for fentanyl and from 3.11 x 10 ( 4 ) +/- 2.83 x 10 ( 4 ) to 52.8 x 10 ( 4 ) for sufentanil .
C0015846
fentanyl
C0143993
sufentanil