The purpose of this study is to compare BIS Monitoring with Clinical Monitoring in recovery Model of patients undergoing open kidney surgery under general anesthesia. All patients undergoing open kidney surgery from March to October 2015 are enrolled. Patients are randomly divided two groups, BIS (B) and control (C). Both groups are anesthetized by an identical method. Anesthetic management of these patients involves the measurement of HR, NIBP, ECG and pulse oximetry at intervals of 5 minutes. Check the depth of anesthesia in Group C measure by checking the heart rate, blood pressure, tears, sweat and pupil size that if increase 20% from initial baseline or change in any of the cases cited, narcotic will inject into the patient. In Group B, BIS monitoring is used. BIS between 60-40 is considered normal and this range will be maintained for the entire duration of surgery. If BIS increased to over 60, despite initial administration of propofol, narcotic is injected into the patient. After surgery, the eye opening time, oral response to verbal stimuli time, extubation time, stay in recovery time, the total amount of narcotic injecting during and after surgery and the first time that use narcotic will record. All data will be analyzed using SPSS software.