16 Monitoring FHR Using DECG
140
being monitored, both waves are displayed, with the DECG wave above the MECG wave. The
MECG wave is labeled
MECG
.
3
Check the artifact suppression setting and change it if necessary (see “Suppressing Artifacts” on
page 140).
WARNING
Periodically compare the mother's pulse with the signal coming from the monitor's loudspeaker to
ensure that you are monitoring fetal heart rate. If the MHR coincides with the FHR, do not
misinterpret the MHR as the FHR (see also “Confirm Fetal Life Before Using the Monitor” on
page 10). When you monitor MHR simultaneously with FHR, cross-channel verification (CCV) warns
you of this possibility.
Suppressing Artifacts
When the monitor's artifact suppression is on, instantaneous heart rate changes of 28 bpm or more,
however caused, are not recorded. Fetal arrhythmia will also be suppressed.
If you suspect fetal
arrhythmia, switch artifact suppression off.
When artifact suppression is off, all recorded fetal
heartbeats within the specified range are shown. The default setting is
On
(artifacts are suppressed).
To change the setting:
1
Enter the
Setup DFHR1
menu.
2
Select
ArtifactSuppress
to toggle between artifact suppression
On
(artifacts are suppressed) and
Off
(no artifact suppression, use this setting if you suspect fetal arrhythmia).
When artifact suppression is off,
Artifact Suppression Off
is annotated on the trace recording.
Printing the Waveform
You can print the DECG wave onto the trace paper. Please refer to “Printing the ECG Waveform” on
page 161.
1
Measurement label (DFHR1)
2
Measurement label (Toco)
3
Additional measurement label
(FHR2)
4
Numeric/measurement values
5
MECG wave
6
DECG wave
7
Noninvasive blood pressure
Summary of Contents for Avalon FM20
Page 2: ......
Page 8: ...8 ...
Page 56: ...3 Basic Operation 56 ...
Page 72: ...5 Alarms 72 ...
Page 82: ...6 Patient Alarms and INOPs 82 ...
Page 86: ...7 Admitting and Discharging 86 ...
Page 90: ...8 Non Stress Test Timer 90 ...
Page 120: ...11 Monitoring Twin FHRs 120 ...
Page 126: ...12 Monitoring Triple FHRs 126 ...
Page 136: ...15 Monitoring Uterine Activity Internally 136 ...
Page 142: ...16 Monitoring FHR Using DECG 142 Testing DECG Mode Refer to the monitor s Service Guide ...
Page 154: ...18 Monitoring SpO2 154 ...
Page 164: ...20 Printing the ECG Waveform 164 ...
Page 166: ...21 Paper Save Mode for Maternal Measurements 166 ...
Page 170: ...22 Recovering Data 170 ...
Page 174: ...23 Care and Cleaning 174 ...
Page 188: ...25 Accessories and Supplies 188 ...
Page 216: ...26 Specifications and Standards Compliance 216 ...
Page 221: ...Part Number 453564290161 Printed in Germany 08 11 453564290161 ...