Philips Avalon FM20, Инструкция по эксплуатации

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10 Monitoring FHR and FMP Using Ultrasound
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Cross-Channel Verification
To reduce the possibility of mistaking the MHR for FHR, it is recommended that you monitor both
maternal and fetal heart rates (see “Monitoring Maternal Heart / Pulse Rate” on page 155). The
monitor's cross-channel verification (CCV) facility can help by automatically detecting when the same
heart rate is being recorded by different transducers.
When the MHR and FHR are being monitored, CCV will alert you when the values are very similar or
the same. This may indicate fetal demise, and the transducer may be picking up a signal from a
maternal source. CCV can compare all monitored heart rates and indicate when any two channels are
picking up the same signal.
When CCV detects two heart rates that coincide, you are alerted within approximately one minute to
check the tracings and potentially to reposition the transducers.
In case of difficulties deriving a stable maternal pulse reading using the Toco MP transducer, it is
recommended to use SpO
2
instead. In case of similar problems with the pulse measurement from
SpO
2
, use MECG instead. Reasons to switch the method for deriving a maternal pulse or heart rate
include: motion artifacts, arrhythmia, and individual differences in pulse signal quality on the
abdominal skin (via Toco MP).
What You Need
• Ultrasound transducer.
• Ultrasound gel.
• Transducer belt (and optional butterfly belt clip, if applicable).
Cordless Monitoring - Important Considerations
When using an Avalon CTS Cordless Fetal Transducer System (M2720A) with your monitor, please
note the following:
•
Refer to “Cordless Monitoring” on page 22 for general rules regarding the use of cordless
transducers from an Avalon CTS Cordless Fetal Transducer System.
• When using a cordless ultrasound transducer from an Avalon CTS system to measure the fetal
heart rate, note that you cannot use any other ultrasound transducer (whether cordless or wired) at
the same time.
WARNING
To avoid interference on ultrasound channels: When changing from using cordless to wired
ultrasound transducers to measure the fetal heart rate, REMOVE the cordless ultrasound transducer
from the patient and dock it in the Avalon CTS basestation. Never use ultrasound transducers
connected to more than one fetal monitor on the same patient.
• When using an Avalon CTS Cordless fetal Transducer System (M2720A), the monitor
automatically sets the Fetal Movement Profile (FMP) to Off, due to the likelihood of generating
artifacts when the mother is mobile. You can enable FMP again manually should you wish, but you
should be aware that FMP is not recommended when the mother is likely to move, and you should