Anaesthetic monitor

Details Anaesthetic monitor Anaesthetic monitor

A - Human Necessities

61

B

326/1, 326/12.6

A61B 5/04 (2006.01) A61B 3/10 (2006.01) A61B 5/0484 (2006.01) A61B 5/16 (2006.01)

Patent

CA 1308169

ABSTRACT OF THE DISCLOSURE A method and apparatus for testing the anaesthetic depth or consciousness of a subject by directing visible red stimulus signals at the eyes of the subject through closed eyelids at accurately known frequencies. An electroencephalographic (EEG) signal is then obtained and a discriminator is used to accurately detect components at the applied frequencies. An assessment is then made by comparing the magnitude or phase of the components of the EEG signal at the predetermined frequencies with correspondingly obtained EEG signals which have been obtained prior to administration of anaesthetic to the subject.

514899

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