The Correlation Between Sevoflurane and qNOX

The Prospective Observational Research of the Analgesic Effect of Sevoflurane and the Correlation Between Sevoflurane and qNOX

This study purpose to observation the sevoflurane analgesia effect, and using nociception real-time monitoring NOX to test the correlation between the sevoflurane and NOX index.

This study purpose to observation the sevoflurane analgesia effect, and using nociception real-time monitoring NOX to test the analgesia effect of the sevoflurane.

And test the correlation between the sevoflurane and NOX index.

Inclusion Criteria:

1. Elective thoracoscope surgery patients
2. Age ranging from 25 to 85 years
3. American Society of Anesthesiologists (ASA) Physical Status score of 2 to 4
4. a body mass index (BMI) ranging from 18.5 to 40 kg/m2.

Exclusion Criteria:

1. Clinical diagnosis of Alzheimer's Disease
2. implanted pacemaker
3. Clinical diagnosis of psychiatric diseases
4. Clinical diagnosis of epilepsy
5. Clinical diagnosis of autonomic nervous system disorders which might affect the EEG