27 - 2 BeneVision N22/N19 Patient Monitor Operator’s Manual
27.1 BIS Introduction
Bispectral Index (BIS) monitoring helps to monitor the level of consciousness of a patient under general
anesthesia or sedation in OR and ICU. It is designed to monitor the hypnotic state of the brain based on
acquisition and processing of EEG signals. Use of BIS monitoring to help guide anesthetic administration may be
associated with the reduction of the incidence of awareness with recall during general anesthesia or sedation.
There are two BIS solutions available for use with the BIS module: using the BISx or using the BISx4. The BISx is for
single side BIS monitoring, and the BISx4 is for both single side and bilateral BIS monitoring. The BISx4 provides
bilateral BIS monitoring only when the BIS Bilateral Sensor is connected.
The BIS component using on this monitor is purchased from Covidien. It is important to recognize this index is
derived using solely that company's proprietary technology. Therefore, it is recommended that clinicians have
reviewed applicable information on its utility and/or risks in published articles and literature/web site
information from Covidien, or contact Covidien at www.covidien.com for clinical-based BIS questions. Failure to
do so could potentially result in the incorrect administration of anesthetic agents and/or other potential
complications of anesthesia or sedation. We recommend that clinicians also review the following practice
advisory (that includes a section on BIS monitoring): The American Society of Anesthesiologists, Practice
Advisory for Intraoperative Awareness and Brain Function Monitoring (Anesthesiology 2006;104:847-64).
Clinicians are also recommended to maintain current knowledge of FDA or other federal-based regulatory,
practice or research information on BIS and related topics.
BIS monitoring is intended for adult and pediatric patients.
27.2 BIS Safety Information
• BIS monitoring is not intended for neonatal patients.
• The conductive parts of sensors and connectors should not come into contact with other conductive
parts, including earth.
• To reduce the hazard of burns in the high-frequency surgical neutral electrode connection, the BIS
sensor should not be located between the surgical site and the electrosurgical unit return electrode.
• To reduce the hazard of burns during use of brain-stimulating devices (e.g., transcranial electrical
motor evoked potential), place stimulating electrodes as far as possible from the BIS sensor and
make certain that sensor is placed according to package instructions.
• The BIS sensor must not be located between defibrillator pads when a defibrillator is used on a
patient connected to the monitor.
(1) BIS menu hard key (2) Sensor check hard key
(3) Module status indicator (4) BIS cable connector
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