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The EEG monitor for the operating room and the intensive care unit


Automatic assessment of
the EEG during anaesthesia and sedation
validated for i.v.-anesthesia (e.g. propofol, etomidate,
thiopental, methohexital) and
all common inhaled anesthetics (e.g. desflurane, sevoflurane, enflurane,
halothan)
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Automatic classification
of the EEG for intravenious and inhalational anaesthetics
with EEG index (fine tuning
of the EEG stages)
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Extremely low running
costs
(ECG electrodes, needle electrodes or cup electrodes can be used)
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1- and
2-channel-recordings from different electrode positions possible,
therefore suitable for use in all surgical disciplines
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Colour display for
various representations of the EEG and EEG parameters
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Special algorithms for
preventing misclassifications of the EEG during anesthesia if
special patterns, e.g. epileptiform activity, occur
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Easy integration into
the anesthesia work place
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Easy operation via touchscreen
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Data transfer via serial
interface
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Report function for
documentation of EEG recordings
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Compact and robust
hardware
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Modular solution in
preparation
The Narcotrend is an easy-to-use EEG monitor for the automatic
assessment of brain waves.
The automatic classification of the EEG by the Narcotrend makes it
possible to assess the patient's hypnotic state during anesthesia and sedation even for
users without any specialist knowledge of EEGs.
The comfortable program handling and the small, robust hardware permit
the use of the system in clinical routine in the operating theatre and in the intensive
care unit.
The electroencephalogram (EEG) as
parameter for assessing depth of anesthesia and sedation
Fields of application
Specifications
Screen display
References
Contact
The electroencephalogram (EEG) as parameter for
assessing depth of anesthesia and sedation
Under the impact of anesthetics/narcotics the EEG
changes in a characteristic way. Thus, the patient's hypnotic state is reflected in the
pattern of the EEG signal.
The EEG monitor Narcotrend performs a computer-assisted analysis of the
EEG signal, including:
- Automatic assessment of the patient's hypnotic state
Based on a number of processed EEG parameters an automatic
classification of the EEG is conducted by means of multivariate statistical analysis. The
classification of the EEG signal is done on an established scale proposed by Kugler
ranging from stage A (awake) to stage F (very deep narcosis). The automatic
classifications of the EEG over time form the cerebrogram. In this way, the user gets
important information about the patient's hypnotic state in the course of time even
without special knowledge of the EEG.
Reliable recognition of artefacts
Absolutely necessary for an efficient EEG interpretation
is the recognition of artefacts in the EEG signal. Comprehensive algorithms for detecting
artefacts are implemented to ensure a reliable automatic classification of the EEG.
Continuous testing of the electrodes
During the recording impedances and electrode potentials
are tested in defined time intervals to ensure a constantly high quality of the EEG
signal.
Fields
of application
In the operating theatre
Ideal for monitoring anesthesia
- individually adjusted dosage of anesthetics / narcotics,
of particular benefit is cost
reduction
prevention of very flat stages of anesthesia (e.g. danger of intraoperative awareness),
particularly in risk patients
prevention of very deep stages of anesthesia (e.g. danger of cumulation of anesthetic
agents), particularly in geriatric patients
Supplementary safety monitoring
- recognition of dangerous situations, e.g. hypoxia
- comparison of both hemispheres, e.g. in carotid surgery
In the intensive care unit
Improved monitoring of sedation
- individually adjusted dosage of sedative agents
- prevention of very flat stages of sedation (e.g. danger of undesirable awareness)
- prevention of very deep stages of sedation (e.g. danger of cumulation of sedative
agents), particularly in geriatric patients
Optimized therapeutic monitoring
- monitoring of barbiturate therapy during status epilepticus and in cases of elevated
intracranial pressure
- brief, orientating diagnosis and monitoring of therapeutic measures in cases of
epileptic seizures
Easy coma screening
- orientating recordings allowing an assessment of the actual state and of trends of the
cerebral function
Specifications
Clearly arranged screen display
- cerebrogram (trend display of the automatic EEG classifications)
- raw-EEG signal
- power spectrum
- two quantiles of the power spectrum (median and spectral edge
frequency)
- power and cumulative representation of relative power in the standard frequency bands
- comparison of signals from both hemispheres
- 1 or 2 channels
Additional trend display
- cerebrogram
- power and two quantiles of the power spectrum
- relative power in the standard frequency bands
- comparison of signals from both hemispheres
- trend displays on screen up to 24 hours
Comfortable program handling
- easy, menu-driven operation
- individually adjustable scaling of diagrams
- complete storage of all data
Additional options
- defining and setting of markers
- 15 Hz- or 30 Hz filter
- Automatic generation and printing of protocols
Screen
display
The Narcotrend offers different screen
displays which can be chosen and adjusted according to the user's individual
needs.
Contact
Addres for correspondence:
PD Dr. Dr. Arthur Schultz
Arbeitsgruppe Informatik / Biometrie
Anästhesie
Klinikum Hannover Oststadt
Medizinische Hochschule Hannover
Podbielskistr. 380
D - 30659 Hannover
GERMANY |
Phone: +49 511 906 - 3100
Fax: +49 511 906 - 3106
E-Mail: info@narcotrend.de |
| Copyright © 2005 PD Dr. Dr. Arthur Schultz |
last update: 17.06.2005 |
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