the cumulative percent power at 3 hz ( cp3 ) increased from 27.2 +/- 6.8 to 83.0 +/- 11.0 for fentanyl and from 22.7 +/- 5.2 to 85.1 +/- 10.4 for sufentanil , while the frequency at 90 % cumulative percent power ( f90 , in hz ) decreased from 17.8 +/- 2.9 to 7.9 +/- 2.8 for fentanyl and 16.4 +/- 5.2 to 5.6 +/- 4.3 for sufentanil .
C0015846
fentanyl
C0143993
sufentanil