Patient Controlled Propofol Sedation Versus Nurse-assisted Propofol Sedation in Diagnostic Colonoscopies With a Focus on Patient Satisfaction

The goal of this clinical trial is to learn if patient administered propofol sedation results in superior patient satisfaction compared to nurse administered propofol sedation in diagnostic colonoscopies.

• Does self administration of the sedative propofol increase patient satisfaction? Researchers will compare patient administered propofol sedation (where the patient administers propofol by pushing a button) with nurse administered propofol sedation (where a nurse gives the patient bolus doses of propofol as deemed necessary)

Participants will:

* Be randomized to either sedation route. * Answer a preendoscopy questioneere and a postendoscopy questioneere 1 hour after the examination as well as one week after the examination.