22
Timing
The FHR, MHR and UA signals generated by Novii are all synchronized, but delayed by a maximum of 10 seconds. The delay
reduces to 6 seconds if the UA interface cable is unplugged from the fetal monitor. Due to this delay, it is important to consider
the following:
1. During prolonged FHR decelerations – use the US transducer simultaneously to obtain a real-time FHR as needed.
2. During epidural placement – if a real-time MHR is needed, disconnect the Novii mECG cable to display the MSpO
2
MHR
reading, or change the MHR source on the GE Corometrics monitor to MSpO
2
. Alternatively, the Corometrics 3 lead mECG
set-up may be used instead of Novii mECG.
3. Coaching women to push during contractions may be dicult, due to the contraction beginning to build before Novii
displays it 10 seconds later. (Therefore, manual palpation is best to conrm onset of contraction.)
4. Mixing monitoring modalities – not recommended or supported except when using the US transducer to supplement the
Novii FHR. See ‘Reassurance’ section on page 19.
Mixed Modality Monitoring – Do not use
Mixed fetal and UA modality monitoring is not recommended or supported. It is very important to understand what clinical
implications could occur if some monitoring modalities are mixed with the Novii, which results from a timing discrepancy of the
recorded data. Novii should never be mixed with a TOCO, IUPC, or Scalp fECG as this could lead to misinterpretation of FHR data.
US should also not be used continuously with or instead of Novii FHR. Please see the graphs below for clarication of timing
discrepancies that could occur with mixing modalities.
Using dierent sources for the MHR from the Corometrics fetal monitor instead of Novii mECG, which may include mSp02 or
3 lead mECG, are acceptable and supported. To use the Corometrics 3 lead mECG, simply disconnect the Novii mECG cable from
the Y adapter and connect the 3 lead mECG cable. To use the mSp02, change the source of the MHR on the Corometrics monitor
to mSp02 or simply disconnect the Novii mECG cable.
Mixing modalities may impact on the interpretation of FHR decelerations and for this reason is not recommended
by GE Healthcare. The illustrations above highlight the changes caused by mixing modality.
10 Second Trace Example
Using US or fECG with Novii UA,
could make a late deceleration appear early
Novii MHR & UA are plotted 5mm*
(10 sec) behind US or fECG
10 sec
US/fECG
(real-time)
Novii MHR
Novii UA
6 Second Trace Example
Using TOCO or IUPC with Novii FHR,
could make an early deceleration appear late
Novii FHR & MHR are plotted 3mm*
(6 sec) behind TOCO or IUPC
TOCO/IUPC
(real-time)
10 sec
US/fECG
(real-time)
Novii MHR
Novii UA
10 sec
Novii FHR
Novii MHR
* based on 3 cm per minute paper speed.
To Next Page
Loading...
Need help?
General
