Principles Of Operation; How The Bis View Monitoring System Works; System Architecture - Aspect BIS VIEW Service Information Manual

SECTION 3
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3 PRINCIPLES OF OPERATION

INTRODUCTION
This section includes:

• How the BIS VIEW Monitoring System works

• The architecture of the BIS VIEW monitor and BISx
• System Features
3.1 How the BIS VIEW Monitoring System
Works
The BIS VIEW Monitoring System consists of:
• The BIS monitor with built-in battery backup and detachable power cord
• The BISx
• Aspect's Patient Interface Cable (PIC) and BIS sensor.
A sensor placed on the patient's head transmits EEG signals to the BISx. The BISx filters
the data, analyzes it for artifact and processes it using digital signal processing techniques,
then sends the data to the monitor for display. The purpose of processing the EEG
waveform data is to extract characteristic features from the complex signal in order to
provide easier pattern recognition of changes over time during the recording.
3.2

System Architecture

Hardware is divided into three main components: the monitor, the BISx, and the Patient
Interface Cable (PIC) with BIS sensor. The BISx contains the circuits that acquire and
digitize the EEG signals, digitally process the EEG data, and compute the processed
parameters. The BIS VIEW monitor contains the circuits to display the waveforms and
processed parameters. The PIC and BIS sensor are the patient connection for EEG signal
acquisition.
A block diagram depicting the monitor subassemblies appears in Figure 5. A data flow
diagram appears in Figure 6.
PRINCIPLES OF OPERATION
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