Evaluate The Effectiveness Of Fospropofol (Lusedra®) For Induction Of Anesthesia

Inclusion Criteria: * Male or female outpatients -\> 18-65 years of age, * weight 60-90 kg, * with an American Society of Anesthesiologists (ASA) physical status of P1 to P3 are eligible for enrollment. * Female patients of child bearing age will have a negative urine pregnancy test result and have used an acceptable method of birth control for \>1 month prior to study enrollment. * Patients will be NPO \>6 hours and scheduled for outpatient urological hydrodilation under general anesthesia. * Patients also will not be enrolled in another study or have received an experimental drug in the prior 30 days. Exclusion criteria are: * hypersensitivity or allergy to any anesthesia, opioids, benzodiazepines or any drugs used in the study, failure to meet NPO status or an abnormal, clinically significant ECG finding. * Another exclusion is the presence of a difficult airway that would prevent use of the laryngeal mask airway (LMA) or successful LMA insertion. * Women who are breast feeding would also be excluded from participation.