GE b30, Technical Reference Manual

Page: 142 / 252

B30 Patient Monitor
5-16
Document no
.
2044677-001
4.2.1 ECG Setup
Bad c-s by mod is a cumulative number that indicates how many communication errors the
module has detected.
The monitor starts counting these items at power up and resets to zero at power off. The values
may also be reset when a module is attached to the monitor frame and be set to 32769 or
continuous counting may be started when the module is removed from the monitor frame.
The nonzero values do not indicate a failure, but the continuous counting (more than 5 per
second) or value 32769 indicates either a serial communication failure or a module not in place.
Also failures in other modules may cause these numbers to rise or be set to 32769.
RAM indicates the state of the RAM memory.
ROM indicates whether the checksum at the EPROM is in accordance with the one the software
has calculated.
EEPROM indicates if the values stored in the permanent memory are valid.
The state is either OK , Fail or
?
(module not in place or a communication error).
LeadsOff indicates whether the monitor can measure ECG even if one or more leadwires are off:
1 = measurement is not possible, 0 = measurement can be done.
MissedPkgs indicates the number of packages missed.
Filter filters the ECG signal high frequency noise and
slow respiratory artifacts:
-
Monit (monitor) filter is used in routine
monitoring. It effectively filters the artifacts
caused by the electrosurgery unit and
respiration.
- Diagn (diagnostic) filter is used if more accurate
information of the waveform is needed (e.g. of
P-wave or AV block). The diagnostic filter is more
susceptible both to high frequencies and
baseline wander than the monitor filter.
- STfilt (ST filter) permits more accurate
information of ST segment. It filters the high
frequency artifacts caused by the electrosurgery
unit, but catches the slow changes in ST
segment. The ST filter is more susceptible to
baseline wander than the monitor filter.
Pacemaker selects how to display the pacing pulse
of cardiac pacemaker. The selections are Show ,
Hide and Sensit :
- Hide : the pacing pulse is filtered away from ECG
data.
- Show : the pacer pulse is filtered away from ECG
data but the pulse is displayed as a constant
height marker.
- Sensit: uses a more sensitive pacemaker
detection. Pacemaker spike is displayed on ECG.