EEG operative and post-operative patient monitoring method

Details EEG operative and post-operative patient monitoring method EEG operative and post-operative patient monitoring method

1998-12-21

2000-05-23

Dvorak, Linda C. M.

Surgery

Diagnostic testing

Detecting brain electric signal

546485, 546529, 546509, A61B 504

Patent

active

060674679

ABSTRACT:
An electrocephalograph (EEG) method is provided to monitor patients during and after medical operations. An anesthesiologist administers sufficient anesthetics to cause the patient to attain the desired plane of anesthesia. The patient's brain waves, both ongoing and evoked by stimuli, are amplified, digitized and recorded. That pre-operative set of brain wave data is compared to a set of the patient's brain wave data obtained during the operation in order to determine if additional, or less, anesthesia is required, paying particular attention to the relative power in the theta band, as an indication of brain blood flow, and prolongations of the latency periods under brain stem stimuli, as an indication of the patient's ability to feel pain. A set of neurometric features are extracted, converted into a normalized statistical score, a discriminant score is thereby developed and the discriminant score converted to a patient state index using probability functions.

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