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What it is function for BIS sensor

June 10, 2025

INDICATIONS FOR USE

Amydi-med Non-invasive EEG electrodes is applied directly to a patient's skin to record physiological signals (e.g., the electroencephalogram, EEG) by the professional personnel. The application duration should not be more than 24 hours. Choose propriate model for different populations (e.g., adults and children) and different application sites

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A BIS (Bispectral Index) sensor is used to monitor the level of consciousness or depth of anesthesia in a patient during surgery or sedation. It provides a numerical value, typically between 0 and 100, that reflects the patient's brain activity in response to anesthetic drugs. This information helps doctors optimize anesthetic delivery, potentially reducing the risk of awareness during surgery and improving recovery times.

Here's a more detailed explanation:
How it works:
The BIS sensor, placed on the patient's forehead, measures brainwave activity (EEG) and uses a proprietary algorithm to calculate the BIS value.

Monitoring consciousness:
The BIS value is displayed on a monitor, providing real-time feedback on the patient's level of consciousness.

Optimizing anesthesia:
By monitoring the BIS value, clinicians can adjust anesthetic dosages to maintain the desired level of sedation or unconsciousness, avoiding over- or under-dosing.

Benefits:
BIS monitoring may lead to reduced recovery times, improved patient outcomes, and a lower risk of complications associated with anesthesia.

Applications:
BIS monitoring is used in various settings, including general anesthesia, intensive care, and procedural sedation.

 TECHNICAL SPECIFICATIONS

AC Impedance (Average / Individual):

2 kΩ /3 kΩ Maximum  

DC Offset Voltage:

100 mV Maximum

Combined Offset Instability and Internal Noise:

150 µV Maximum

Bias Current Tolerance (DC Voltage Offset):

100 mV Maximum


BIS Value Interpretation Guide

BIS Range Clinical State Clinical Significance
85–100 Awake Patient responsive to commands.
60–80 Moderate sedation Responsive to loud stimuli; limited recall.
40–60 General anesthesia Optimal for surgery; no awareness.
<40 Deep hypnotic state Risk of hemodynamic instability.
0 Isoelectric (flatline EEG) No detectable brain activity.