6 ECG, Arrhythmia, ST and QT Monitoring
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HR Alarms When Arrhythmia Analysis is Switched Off
When arrhythmia analysis is switched off, only these HR-related alarms will be detected:
• the asystole alarm
• the ventricular fibrillation/tachycardia alarm
• the extreme tachycardia and extreme bradycardia alarms
• the high heart rate and low heart rate alarms.
Enhanced Asystole Detection
In order to improve alarming on asystole under certain conditions, you can set Asystole Detect. in
Configuration Mode to
Enhanced. In enhanced mode an asystole alarm will be suppressed for up to
five seconds if a valid beat-to-beat Pulse is detected from an arterial Pressure.
ECG Safety Information
CAUTION
Interference from instruments near the patient and ESU interference can cause problems with the
ECG wave. See the monitor specifications for more information.
WARNING
Defibrillation and Electrosurgery:
Do not touch the patient, or table, or instruments, during defibrillation.
After defibrillation, the screen display recovers within 10 seconds if the correct electrodes are used and
applied in accordance with the manufacturers instructions.
ECG cables can be damaged when connected to a patient during defibrillation. Check cables for
functionality before using them again.
According to AAMI specifications the peak of the synchronized defibrillator discharge should be
delivered within 60 ms of the peak of the R wave. The signal at the ECG output on the IntelliVue
patient monitors is delayed by a maximum of 30 ms. Your biomedical engineer should verify that your
ECG/Defibrillator combination does not exceed the recommended maximum delay of 60 ms.
When using electrosurgical (ES) equipment, never place ECG electrodes near to the grounding plate of
the ES device, as this can cause a lot of interference on the ECG signal.
General:
When you are connecting the electrodes or the patient cable, make sure that the connectors never
come into contact with other conductive parts, or with earth. In particular, make sure that all of the
ECG electrodes are attached to the patient, to prevent them from contacting conductive parts or earth.
During surgery:
Use the appropriate orange electrode ECG safety cable, or lead cable with an orange connector, for
measuring ECG in the operating room. These cables have extra circuitry to protect the patient from
burns during cautery, and they decrease electrical interference. This also reduces the hazard of burns in
case of a defective neutral electrode at the HF device. These cables cannot be used for measuring
respiration.
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