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Depth of anesthesia and sedation module




Resuscitation science

Intensive care during postoperative period

Treatment sedation

Depth of anesthesia module is complex OEM solutions for monitoring brain activity index (AI).

AI - a parameter to evaluate the effect of general anesthesia and sedation brain. It is calculated on the basis of continuously recorded EEG.

When surgical interventions AI allows you to:

  • eliminate the risk of early exit from the anesthesia;
  • reduce the consumption of anesthetics;
  • reduce the time of exit after anesthesia by 35-50%.

The AI allows the ICU:

  • stably maintain the required depth of sedation (according to statistics, without AI-control more than 69% of patients have insufficient or excessive depth of sedation);
  • improve the quality of care and reduce costs sedatives.

Principle of operation:

  • electrodes located on the patient's forehead, from which recorded EEG;
  • module processes the incoming signal and calculates AI-index, number from 0 to 100, which gives an indication of the degree of consciousness of the patient;
  • AI-index value of 100 means that the patient is fully conscious;
  • AI-index value of 0 means there is no brain activity.
  • general anesthesia AI- index value must be in the range from 40 to 50; Sedation is recommended for level 60 to 85.


Main parameters

AI - Brain activity index

indicates patient`s depth of anaesthesia and sedation level.

Depth of anaesthesia evaluation is based on analisys of electroencephalogram (EEG). Algoritm of EEG analisys keeps information about typical signs of influence of different groups of anaesthetics - types of EEG suppresion

SR - EEG signal suppresion rate reflects the suppression of EEG activity and determines level of the further deepening of anaeshesia
SQI - EEG signal quality index indicates the influence of impedance of cable electrodes, artifacts, high-frequency noise, power mains disturbances and decreases linearly from 100% to 0%
EMG - Electromyographic component level electrical activity of facial muscles

Technical specifications

Patient age groups Adults, children 10 years old and older
Measurement method Data processing of one electroencephalogram lead
Scheme of applying of electrodes

Derivation points F7-FZ

F8-FZ (a frontotemporal part)

Displaying digital parameters

Brain activity index (AI)

Signal suppression ratel (SR)

Signal quality index (SQI)

Electromyographic component level (EMG)

Impedance of electrodes (Z1-Z3)

Low level of alarm on AI

High level of alarm on AI


Visual and sound alarm system

High AI

Low AI

Technical alarms

Controllable alarms and trends

Excess of the measured value of index of a brain activity from the value established by the user for alarm system 

Excess of the measured value of impedances of electrodes for the preestablished value 

Reduction index of a signal quality below the preestablished value 

Inadmissible high level of a interference from EHI or a mains-operated interference


24 hours of graphical trends

Features and advantages

Universality Operates with inhalation and intravenous anaesthetics
Low cost in operation Kit from 3 typical ECG-electrodes is used for measurement
Simplicity and safety for patient 3 ECG-electrodes are placed on the fronto-temporal lobes of the patient

Using the device allows:

  • reduce the consumption of anaesthetics, as well as reduce time of the awakening from anaesthesia by 35-50%;
  • stably maintain the required depth of sedation (according to statistics, without AI-control more than 69% of patients have insufficient or excessive depth of sedation);
  • modtly eliminate the risk of a awareness from anaesthesia.


The information is for reference only. The list of features is not complete.For the detailes information please contact the manufacturer.

Not a public offer.