GE Corometrics 250cx Series, Operator'S Manual

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5-6 250cx Series Maternal/Fetal Monitor Revision C
2036946-001
Fetal Heart Rate Monitoring: Fetal Heart Rate Alarms
Fetal Heart Rate Alarms
FHR Threshold Alarms
A fetal heart rate threshold alarm occurs when any fetal heart rate falls outside of the
pre-defined alarm limits—greater than the high limit setting or less than the low
limit setting. These alarm limits are configured via the user setup mode; the alarm
can be completely disabled as well.
NOTE:
The alarm enable/disable setting controls all FHR alarms: high, low, and
signal quality.
A threshold alarm is indicated both visually and audibly. Visual indications are
provided by the Alarm indicator
and the respective heart rate numerics. The
audio alarm is described as alternating high-low tones.
CAUTION
Prior to monitoring each patient, it is recommended that you
check the alarm status and alarm limits to ensure they are
appropriate for the patient. The alarms are disabled if the Alarm
Disable indicator
is lit; they are enabled if the indicator is
unlit.
Latching Alarms
Fetal heart rate threshold alarms are “latching.” This means that a clinician must
acknowledge the alarm using the monitor’s
Alarm Silence
button in order to clear the
alarm.
„
Active Threshold Alarm: Press the
Alarm Silence
button to cancel the audio
component of an active threshold alarm. The visual indications remains present
until the FHR value returns to within the defined acceptable range.
„ Unsilenced, Resolved Threshold Alarm: If a threshold alarm condition
resolves, prior to being silenced (clinical acknowledgment), the visual and
audible indications both remain present. Press the
Alarm Silence
button to
cancel both the audible and visual indications.