What happens when we attempt duplex ultrasound imaging of the ductus venosus in a 3rd trimester pregnancy who just cant hold her breath?
These images tell the story:
During cessation of respiration (breath holding):
These images tell the story:
During cessation of respiration (breath holding):
Observe the nice tracing/ waveform
And when the patient continues respiratory activity:
Note the interruption of the waveform. Possibly the sampling gate has shifted to another nearby vessel.
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