Patent AU-2023200267-A1 (AU)
Title: Anaesthesia and consciousness depth monitoring system
Inventor: BURTON DAVID
IPC: A61B5/395
Filed: 2023-01-19
Abstract: Apparatus for acquiring physiological data from a biological subject for determining the level of pain, 
sedation, anaesthesia, consciousness, attention, cognitive functionality, cognitive awareness or cognitive 
memory retention of said biological subject comprising of: means for generating a stimulus for evoking at 
least one response signal in said biological subject; means for deriving at least two parameters from said 
evoked response signal obtained from the means for generating the stimulus, which is able to 
communicate with the means for generating the stimulus through a biofeedback servocontrolled 
functionality; wherein said parameters derived from said evoked response signal are representative of at 
least one of physiological or psychological mechanisms of said biological subject, wherein said means for 
deriving at least two parameters from said evoked response signal is adapted for determining the biological 
subject's responsiveness underlying sensory, myogenic or neurogenic comprising of myogenic-related 
activity of postauricular muscle response changes in accordance to stimulus amplitude changes - which in 
turn is an indicative measure of corresponding muscular paralysis associated with the administration of a 
muscular suppressant administered to the said biological subject, the stimulus can be utilized, in an 
interrogatory process to propagate or elucidate different physiological and psychological responsiveness by 
way of gauging the responsiveness corresponding to the stimulus, as a means to interrogate different levels 
of cognitive function or as a means to assess different degrees of muscular or sensory activity or sedation, 
while performing the interrogatory process, the intensity of the stimulus is increasing or decreasing or 
repeating to verify or qualify differing physiological or psychological status; and such interrogatory 
processes enable hierarchical assessment of the cognitive or physiological status of the biological subject.
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