GE HEALTHCARE E-PSMP, Technical Manual

Page: 478 / 622

Module Frames and Modules
13 - 4
2062973-004
1.3.2 BIS measurement system block diagram
The BIS measurement chain is composed of BIS sensor, BISx Digital Signal Processing Unit,
E-BIS module containing an interfacing board, and a host monitor. A block diagram of the
system is shown below.
Figure 4 BIS measurement system block diagram
1.3.3 BISx Digital Signal Processing Unit
BISx Digital Signal Processing Unit receives, amplifies and digitizes patient EEG signals. It is
placed close to the patient's head where the EEG signal is less subject to interference from
other medical equipment. The BISx Unit is connected to the module with a 2.7 m long shielded
cable and to the BIS sensor with a 1.2m long patient interface cable, see Figure
1.
Measurement setup. For BIS Sensor related documentation refer to BIS documentation by
Aspect, Inc.
WARNING Do not autoclave the BISx Digital Signal Processing Unit with steam or
sterilize with ethylene oxide. Do not open it for any reason.
WARNING When using the electrosurgery unit, it needs to be noted that the
measurement cables do not incorporate means to protect against burns in
BIS Engine
DSC
Digital Signal
Converter
Patient Isolation
BIS Sensor
Host Monitor
M
eas
urem
ent
Cont
rol
Po
w
er
Se
ria
l
dat
a
Controller
BIS Interfacing Board
BIS Module
PIC+
Keys
MBUS
Serial data Power
Di
gi
ta
l s
ignal
Po
w
er
B
IS
_
meas_bl
o
ckdi
ag.vsd
%,6[
'LJLWDO6LJQDO
3URFHVVLQJ8QLW
3DWLHQW,VRODWLRQ
%,66HQVRU
+RVW0RQLWRU
0HD
VXUHPHQ
W
&RQW
URO
&RQWUROOHU
%,6,QWHUIDFLQJ%RDUG
%,60RGXOH
3,&
.H\V
0%86
6HULDOGDWD3RZHU
'LJLWDOV
LJQD
O
3R
Z
H
U