GE CARESCAPE, User Manual

Page: 176 / 548

ECG
WARNING
— PAUSED ANALYSIS — Certain conditions pause arrhythmia
analysis. When paused, arrhythmia conditions are not
detected and alarms associated with arrhythmias do not
occur. Conditions causing paused arrhythmia analysis include
arrhythmia off, arrhythmia paused, leads fail, alarm pause, all
alarms off, and discharged patient.
WARNING
— FAILURE TO DETECT LETHAL ARRHYTHMIA — Always monitor
ECG for arrhythmia detection purposes. HR calculated from
pulsatile SpO
2
waveform may differ significantly from ECG HR
measured values. Users should be aware that the SpO2 probe
off and No SpO2 pulse technical alarms escalate no higher
than a Medium priority.
WARNING
— FAILURE TO DETECT LETHAL ARRHYTHMIA — The SpO
2
parameter pulsatile heart rate measurement is based on the
optical detection of a peripheral flow pulse and therefore may
not detect certain arrhythmias. The pulse oximetry parameter
should not be used as a replacement or substitute for ECG
based arrhythmia analysis.
WARNING
— ARRHYTHMIA PAUSED alarm — The Arrhythmia paused
alarm indicates that the system is no longer monitoring
arrhythmia or heart rate from ECG. If you adjust the alarm
priority level lower than the default value, keep the patient
under close surveillance.
Arrhythmia measurement limitations
●
Since the arrhythmia detection algorithm sensitivity and specificity is less than
100%, sometimes there may be some false arrhythmias detected and also some
true arrhythmia events may not be detected. This is especially true when the signal
is noisy.
●
The ECG size and QRS width settings affect arrhythmia detection and heart rate
calculation sensitivity.
●
If QRS amplitude is low, the monitor might not be able to calculate HR and false
Asystole may occur.
●
During the learning phase of the algorithm, arrhythmia detection may not be
available. As a result, the patient condition should be closely monitored during
the learning phase and for several minutes after the learning phase to allow the
algorithm to reach optimal detection performance.
●
Not all ECG acquisition devices recognize the same set of arrhythmias. For
example, telemetry monitoring devices and TRAM do not recognize
SV Tachy ,
Multifocal PVCs , and Missing beat , but these will be recognized by devices like
PDM and PSM. Additional arrhythmia recognition may be added in future versions
of monitoring devices. Because remote devices like central stations may not be
aware of all arrhythmias recognized by acquisition devices, the monitoring devices
rename some arrhythmias when they are sent to the network. Monitoring devices
rename the following arrhythmias when sending them to the network:
Shown on the monitor Shown at remote devices like central
stations
SV Tachy Tachy
Frequent SVCs
Irregular
176 CARESCAPE Modular Monitors 2062971-001