Prospective, randomized-controlled trial (RCT) comparing the use of Propofol and traditional sedation (Midazolam and Fentanyl) for diagnostic and screening endoscopies in patients with liver diseases. The investigators' working hypothesis is that the use of propofol will be translated in a shorter recovery and discharge times with a higher patient satisfaction and a decrease in general complications in the context of patients with advanced liver disease.

Inclusion Criteria:

• Consecutive patients older than 18 and younger than 75 years with advanced liver disease, defined by the presence of liver fibrosis at least F3 and higher in the METAVIR score or with established cirrhosis (Child Pugh A, B and C)

Exclusion Criteria:

• Patients with significant cardiorespiratory disease i.e. advanced respiratory, renal and heart failure (ASA class III or higher except for patients with decompensate liver cirrhosis), obstructive sleep apnea or those with mild degree of liver fibrosis (less than F3)