"Light Versus Deep Bispectral Index (BIS) Guided Sedation for Colonoscopy"

"The intervention is the depth of sedation targeted in this study.~Patients enrolled in this study will be sedated with the same medications (fentanyl bolus and propofol target controlled infusion), and at the same starting doses, in each study arm. However, the depth of sedation targeted will differ between the arms, and this depth will be guided by the BIS monitor.~It is expected that those patients randomised to deep sedation will require a higher dose of sedative medication to achieve their target BIS value (\<60) than those in the light sedation group (BIS 70-80)."