Patient SatisfactionJob SatisfactionPersonal SatisfactionQuestionnairesPain, PostoperativePain MeasurementQuality of Health CareAnalgesia, Patient-ControlledTreatment OutcomePhysician-Patient RelationsHealth Care SurveysConscious SedationProspective StudiesMeperidineConsumer SatisfactionFentanylQuality of LifeCross-Sectional StudiesTime FactorsHospitals, TeachingBupivacaineAnesthetics, LocalRetrospective StudiesAnalgesics, OpioidHospital-Patient RelationsDouble-Blind MethodPropofolReproducibility of ResultsHospitals, UniversityFollow-Up StudiesHospitals, GeneralNursing Staff, HospitalOutpatient Clinics, HospitalHospital CostsOutcome Assessment (Health Care)Hospitals, UrbanLength of Stay