Effects of Lidocaine Bolus and Infusion on Bispectral Index Values and Spectrum During Anesthesia Maintenance

Effects of Lidocaine Bolus and Continuous Infusion on Bispectral Index Values and Spectrum During Maintenance of Total Intravenous Anesthesia With Target Controlled Infusion (Schnider Model)

Lidocaine has been shown to increase the hypnotic effects of Propofol, however no trials shows the effects on Bispectral Index Values (BIS) and spectral analysis during total intravenous anesthesia maintenance delivered with target controlled infusion (TCI) with stable Concnetration at the effector site of Propofol (CeP)

Lidocaine has been shown to increase the hypnotic effects of Propofol, however no trials shows the effects on Bispectral Index Values (BIS) and spectral analysis during total intravenous anesthesia maintenence delivered with target controlled infusion (TCI) with stable concentration at the effector site of Propofol (CeP).

Aim of this study is to analyze BIS values and power spectrum before and after a lidocaine bolus (1,5 mg/kg delivered in 10 minutes) and a subsequent continuous infusion (1,5 mg/kg/min for 30 minutes) delivered at anesthetist's discretion for postoperative analgesia.

Inclusion Criteria:

• Undergo general anesthesia with Target Controlled Infusion of Propofol (Schnider model) and Remifentanil (Minto model) and Lidocaine bolus and continuous infusion for a total of 40 minutes.

Exclusion Criteria:

• Neurological disease
• Psychiatric disease
• Obesity