C-18 250cx Series Maternal/Fetal Monitor Revision C
2036946-001
Spectra Alerts: Alert Parameters
Summary of Alert Parameters
ALERT PARAMETERS SUMMARY ON FHR SETUP SCREEN TREND SCREEN
Parameter Column 1 Column 2 Message Criteria
FHR Variability
Unknown (external)
Average (internal)
Baseline variability is determined to be 5–15
beats peak-to-peak.
Increased
VARIABILITY?
Alert pending. Approximately 5 minutes of
baseline variability which is > 15 beats peak-
to-peak.
Alert is issued if baseline variability remains
increased for approximately 10 minutes and
there are no other FHR alerts detected.
Alert silenced.
Decreased
VARIABILITY?
Alert pending. Reflects the detection of
baseline variability which is < 4–5 beats
peak-to-peak for approximately 10 minutes.
Alert will be issued 20–40 minutes after
decreased variability is detected. The “time-
to-alert” depends on whether or not any
other alert parameters are outside the
normal range.
Alert silenced.
Flat
VARIABILITY?
Alert pending. Absent variability detected for
approximately 4 minutes.
Alert will be issued approximately 6–10
minutes after “flat” variability is detected.
Alert silenced.
Alert is deleted if approximately 5 minutes of
“better” variability is detected.
Decelerations Absent
Present
(May miss subtle decelerations.)
Deceleration with or without a contraction is
detected. This indication may come and go
prior to alert condition. Once an alert
condition is detected, the word Present
remains until the alert condition is resolved.
Increased
Increased
VARIABILITY?
Decreased
Decreased
VARIABILITY?
Flat
Flat
VARIABILITY?
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