Efficacy and Safety of Fospropofol Disodium Versus Propofol for Deep Sedation in Critically Ill Patients

Inclusion Criteria: * Age ≥ 18 and ≤ 80 years; Expected to require deep sedation ≥8 hours; Requirement for deep sedation (a Narcotrend index between 13 and 64). Exclusion Criteria: * Body mass index (BMI) \<18 or \>30 kg/m2; Contraindicate or allergic to study drugs; Moribund state; Expected to have a general anesthesia within 8 hours; Myasthenia gravis; Acute hepatitis or serious hepatic dysfunction (Child-Pugh class C); Chronic kidney disease with glomerular filtration rate (GFR) \< 29 ml/min/1.73m2; Systolic blood pressure less than 90 mm Hg after appropriate intravenous volume replacement and continuous infusions of 2 vasopressors; Acute severe neurological disorder and any other condition interfering with RASS assessment; Pregnancy or lactation; Unstable angina; Acute myocardial infarction; Left ventricular ejection fraction less than 30%; Heart rate less than 50 beats/min; Second- or third-degree heart block in the absence of a pacemaker; Alcohol abuse or drug abuse.