A 33 year-old female patient was admitted to the hospital with acute appendicitis. She had idiopathic cervical internal carotid artery vasospasms and had been taking aspirin. We used intracranial oxygen saturation measuring instrument (INVOS®) for anesthetic management during general anesthesia. We administered atropine and continuous small amount of dopamine, and loaded fluids when her blood pressure decreased. We refrained from using medicines which might influence cerebral blood flows. Intracranial oxygen saturation was maintained above baseline during the operation. Intracranial oxygen saturation measuring instrument was useful in achieving the maintenance of intracranial environment Administration of dopamine and atropine was useful and safe in keeping the circulation dynamics and intracranial tissue oxygen saturation in this patient.