Patent Document ID: 20110130675
Application ID: 12628568
Patent Flag: 0

Claim One:
1. A method of determining EEG signal quality in a device for quantifying brain or cortical activity during sedation or anesthesia comprising steps of: a. monitoring a subject with a brain having a left hemisphere and a right hemisphere, by hooking the subject up to a brain or cortical activity quantification device with at least two measurement electrodes, and at least one reference electrode, the at least two measurement electrodes comprising at least one EEG electrode, having a signal, positioned to monitor left hemisphere brain or cortical activity and at least one EEG electrode, having a signal, positioned to monitor right hemisphere brain or cortical activity of the subject's brain, the reference electrode comprising at least one EEG electrode, each electrode providing an EEG signal to a processor; b. measuring the brain or cortical activity of both the subject's left and right brain hemispheres essentially simultaneously; c. calculating with the processor at least one QEEG index corresponding to the brain or cortical activity of each of the left and right hemispheres of the subject's brain; d. displaying at least two indices corresponding to the brain or cortical activity of the left and right hemispheres on a monitor simultaneously; e. comparing the indices of each hemisphere's cortical activity; and f. determining whether the signal of at least one of the EEG electrodes is likely to have poor quality.