Clinically Relevant Asymmetry of Bispectral Index
Clinically Relevant Asymmetry of Bispectral Index
BIS for monitoring depth of anesthesia is usually obtained unilaterally. Obtaining BIS
 bilaterally revealed side differences in previous studies. This study investigates the
 incidence of clinically relevant side differences of BIS during maintenance and emergence
 from anesthesia for ENT surgery in both adults and children.
BIS was measured bilaterally in 42 adults and 46 children during ENT surgery under general
 anesthesia using two BIS-Monitors. Side differences of more than 10% were defined as BIS
 asymmetries. An increase of BIS of more than 10% from the value at the time of finishing
 anesthesia administration on only one side followed by movement after stimulation was defined
 as clinically relevant.
Inclusion Criteria:Children and adults during anesthesia for ENT surgery -

 Exclusion Criteria:Neurologic or psychiatric disease

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