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History
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The following scans were
obtained from a normal 29wk fetus.
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Ultrasound
Findings
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The doppler
waveforms have changed within three minutes from
waveform that had no onward diastolic flow to one that
has. This means that a distinct change has occurred in
the resistance faced by the MCA (or there is relative
vasodilatation). Neither waveform shows "brain
favouring effect".
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(click on
pictures for expanded view)
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Discussion
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Can anyone on this
forum provide an explanation for such a dramatic change
in the waveforms?
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Follow-Up
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This 25yr old mother to be
was about 31weeks. Cephalic presentation. I wish to
highlight, that the MCA waveforms have changed with
transducer pressure. RI values have gone up from 0.75 to
0.88 to 0.92 with varying degrees of transducer
pressure. On an earlier instance when I saw changing
waveforms I was perplexed and could not understand why
this happened within a matter of minutes.
(click
pictures for expanded view)
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