End Tidal Carbon Dioxide Concentration and Depth of Anesthesia in Children

BIS readings will be recorded continuously at 'High Normal ETCO2' (50 mmHg +/- 3 mmHg). Each patient will be tested at High normal, normal, and low normal ETCO2 levels in a randomized order.

BIS readings will be recorded continuously at 'Normal ETCO2' (40 mmHg +/- 3 mmHg). Each patient will be tested at High normal, normal, and low normal ETCO2 levels in a randomized order.

BIS readings will be recorded continuously at 'Low Normal ETCO2' (30 mmHg +/- 3 mmHg). Each patient will be tested at High normal, normal, and low normal ETCO2 levels in a randomized order.