SNAP VS BIS(OAA/S) Scale During a Sedation Regimen With and Without Ketamine

A Comparison Between the Correlation of the Bispectral Index Versus Snap Index With the Observer's Assessment of Alertness and Sedation (OAA/S) Scale During a Sedation Regimen With and Without Ketamine

The study question: Does the SNAP-Index (SI) correlates better with the OASS than the BIS Monitor during sedation with ketamine?

The study hypothesis: Since the SNAP II monitor seems to be more responsive during emergence of anesthesia, it will have a better correlation with the OASS than the BIS monitor with the use of ketamine.

Inclusion Criteria:

• Age : 18-64 years
• ASA : I-III
• Procedure : Breast or gynecological surgery
• Anesthesia :Monitored anesthesia care

Exclusion Criteria:

• Pregnancy

• Breast Feeding

• Body Mass Index >35kg/m2

• Drug or Alcohol abuse

• Use anticonvulsants

• History of CVA

• Drop-out criteria:

  • Patient or surgeon request
  • Conversion to general anesthesia
  • Inability to obtain data from both monitors