Fhr Low Alarm; Sample Clinical Exceptions - GE Corometrics 170 Series Operator's Manual

FHR Low Alarm

Sample Clinical Exceptions

Revision D
Fetal Heart Rate Monitoring: Fetal Heart Rate Alarms
The simplest example of a low FHR alarm occurs when the FHR value is
continuously less than the threshold (low limit) for 30 seconds. When data
consistently violates the limit, the time-to-alarm is 30 seconds. See
FHR (BPM)
1
Figure 5-7 provides an example of FHR fluctuations above and below the high
alarm limit setting.
FHR (BPM)
1
Figure 5-7. Fluctuations Near High Alarm Limit Example
Whether or not the pattern shown in
percentage of the data violates the limit. The monitor evaluates the data on an on-
going basis; the methodology can be simplified as follows:
A FHR threshold alarm occurs if the FHR violates the alarm limit setting for
more time than it stays within the specified acceptable range.
The time-to-alarm increases as a greater percentage of data stays within the
specified acceptable range.
170 Series Monitor
2003023-001
alarm activates
5
2 3 4
Figure 5-6. Low FHR Alarm Example
3 4 5
2
Figure 5-7 generates an alarm depends on what
Figure 5-6.
low alarm limit
(threshold)
Time (minutes)
high alarm limit
(threshold)
Time (minutes)
5-11