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.