Two speed system for EEG recording
OwnerHeriberto Fernandez, George T. Pardueinventors
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Abstract
A method and system for recording EEG waveforms whereby the amplitude of the waveform signal in both positive and negative direction is compared with variable levels and a trigger signal produced when the amplitude exceeds a level to cause the strip of recording paper to speed up for at least a predetermined time and to continue for the length of the seizure so that little paper is accumulated during periods of uninteresting activity while a complete readable record is produced of any notable EEG activity, such as an epileptic seizure.
Claims16
A system for recording EEG electrical body waveforms comprising:
- means for detecting an EEG waveform and producing an electrical signal representing said waveform,
- means for comparing the amplitude of said electrical signal with a predetermined amplitude level and producing a trigger signal when said amplitude of said electrical signal exceeds said predetermined level,
- means responsive to said electrical signal for producing a graphical representation of said waveform on a strip of recording material,
- means for driving said strip of recording material past said representation producing means, and
- means for causing said driving means to change the speed at which said recording material is driven from a first speed to a second speed higher than said first speed when said comparing and producing means produces said trigger signal.
A system for recording EEG electrical body waveforms comprising:
- means for detecting an EEG signal and producing an electrical waveform signal,
- means connected to said detecting and producing means for producing a trigger signal when the amplitude of said waveform signal in at least one polarity exceeds a predetermined level with respect to a given reference,
- means responsive to said waveform signal for producing a graphical representation of said waveform on a strip of recording material,
- means for driving said strip past said representation producing means, and
- means for changing the speed at driving said strip for a predetermined time from a first speed to a second speed higher than said first speed upon production of said trigger signal.
Dependencies are inferred from the claim text.