Effect of Sedatives on Perioperative Electroencephalogram in Elderly Patients Undergoing Spinal Anesthesia

Effect of Sedatives on Perioperative Electroencephalogram in Elderly Patients Undergoing Spinal Anesthesia

In the present study, we observe perioperative findings of electroencephalogram in sedated and non-sedated elderly patients undergoing total knee arthroplasty under spinal anesthesia.

In the present study, we observe perioperative findings of electroencephalogram in sedated and non-sedated elderly patients undergoing total knee arthroplasty under spinal anesthesia. Electroencephalogram is performed before, during, and 1 day after surgery.

After the induction of anesthesia, sedation is performed according to the patient's request. If a patient want to be sedated during surgery, one of the three sedatives (dexmedetomidine, propofol, and midazolam) is administered.

Inclusion Criteria:

• Eldery patients scheduled for spinal anesthesia

Exclusion Criteria:

• MMSE ≤ 23
• Hemodynamic unstability
• Liver disease
• Renal disease