A method and apparatus based on combination of three phsysiological parameters for assessment of analgesia during anesthesia or sedation
Research output: Patent › Scientific
|IPC||A61B 5/ 11 A I|
|Publication status||Published - 12 Jan 2005|
|Publication type||H1 Granted patent|
The invention relates to a method for monitoring a condition of a patient under anesthesia or sedation, whereupon one, two, three or more signals are acquired, and the signal(s) represent(s) cardiovascular and/or combined electrical biopotential on skull activity of the patient. From said signal or signals are derived or calculated at least two parameter values related to a quantity like waveform amplitude, waveform periodicity, waveform morphology, waveform variability, energy, power, signal complexity and frequency content. A predetermined mathematical index for probability of patient comfort is used, in which function said parameters are variables, and successively changing probability index values of said mathematical index is calculated.