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Monitoring Triple FHRs
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If your monitor is equipped with the triplets option, it carries the
You can monitor triple FHRs externally using three ultrasound transducers. Triplets monitoring is not
possible using the Avalon CTS Cordless Fetal Transducer System.
Refer to the appropriate preceding chapters for contra-indications and other information about the
measurement methods you have chosen.
FHR detection by the monitor may not always indicate that the fetuses are alive. Confirm fetal life
before monitoring, and continue to confirm that the fetuses are the signal source for the recorded
heart rate.
Important Considerations
The procedures and any contra-indications that apply for twins monitoring also apply for monitoring
triplets. In addition, when monitoring triplets:
•
Be aware that monitoring three FHRs is inherently more difficult than monitoring single or twin
FHRs. The nature of the application increases the likelihood that a fetal heart rate is monitored by
more than one transducer.
Make sure that you are recording three different fetal heart rates. Pay particular attention to any
coincidence of heart rates detected by the monitor's cross-channel verification feature. The cross-
channel verification feature alerts you (by showing a
is, if two or more transducers are recording the same FHR, or if a fetal transducer is recording the
MHR). If this happens, check the trace, and if necessary, reposition the ultrasound transducers as
appropriate to detect all the FHRs correctly. If necessary, identify the FHRs using independent
means, such as a fetoscope, stethoscope, or Pinard stethoscope.
•
The blue transducer Finder LED lets you identify at a glance which transducer is monitoring
which heart rate channel.
The fetal sensor socket to which a transducer is connected is identified by the transducer position
indicator in the blue setup menu header:
for FM20/30;
label.
) if two or more heart rates coincide (that
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