One of the most dramatic transformations in health care delivery during the past two decades has been a shift from inpatient to outpatient surgery (also called ambulatory surgery). Two common anesthetic techniques in outpatient surgery are total intravenous anesthesia (TIVA) and volatile induction and maintenance of anesthesia (VIMA). Volatile induction and maintenance of anesthesia (VIMA) is a new anesthetic technique used in outpatient surgery to ensure a stress free perioperative period without delaying home readiness. The potent volatile anesthetic, aevoflurane has low blood/gas solulitlity that permits more rapid induction and emergence from anesthesia and more rapid control of anesthetic depth. Although the induction of anesthesia using face mask with a volatile agent is common in pediatric patients, sevoflurane makes that technique possible in adults because sevoflurane is nonpungent and minimally irritant to the lungs. The advantages of mask induction of anesthesia in adults by sevoflurane include avoidance of apnea, anaphylaxis, hypotension, the hang over effect associated with intravenous induction, and venipuncture in anxious patients, Also, the cost of an induction with propofol is twice or more as induction with 8% sevoflurane using a fresh gas flow of 6L/min.