Effects of Hypercapnia on Emergence From General Anesthesia Under Propofol

Effects of Hypercapnia on Emergence From General Anesthesia Under Propofol: a Pilot Study

Hypercapnia derives increase of cerebral blood flow and cardiac output. It means that the rate of propofol elimination from the brain and the blood will be increased and the patient will awake more quickly. There has been no study about the effects of hypercapnia. The investigators will evaluate hypercapnia's effects on the recovery time from propofol anesthesia.

Inclusion Criteria:

• American Society of Anesthesiologists physical status (ASA PS) I-II
• Age 20 - 60 years male and female
• Elective schedule with minor surgery under general anesthesia

Exclusion Criteria:

• Body mass index (BMI) >= 30 (kg/m2)
• Patient with pulmonary, cardiac, endocrinal, neuromuscular and neurological diseases or past history
• Patient with medication affecting on this study
• Patient with general anesthesia history within one month