If the dosage of sufentanil and fentanyl exceeded the upper limited dose ( sufentanil @ gkg ( -@ ) h ( -@ ) , fentanyl @ gkg ( -@ ) h ( -@ ) ) but FPS could not meet ( still > @ ) , and maintained the upper limited doses of sufentanil and fentanyl and added midazolam , and FPS@ or Ramsay @ could meet the standard .