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15 Cards in this Set
- Front
- Back
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tx for pseudoaneurysm
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US guided thrombin injection
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classic findings associated with pseudoaneurysm (on US)
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to and fro flow
yin-yang sign |
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what does the paraumbilical vein flow into
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L portal vein
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describe high resistnance vascular waveform
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there is no flow during diastole
seen in muscles |
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describe low resistance vascular waveform
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flow is maintained during diastole
end organs (kidneys, brain, etc have this type of flow) |
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what defines a good systolic upstroke
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should be vertical or nearly vertical
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nml velocity of a visceral artery
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80-120 cm/s
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parvus et tardus waveform
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subtly angled upstroke
decreased velocity |
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when is parvus et tardus waveform seen
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when you are sampling a BV distal to a stenosis
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how do you know you are proximal to a stenosis on US
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there will be increased velocity of the bloodflow, but no aliasing
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how do you know you are AT an area of stenosis
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increased velocity
aliasing |
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appearance of aliasing
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you have flow to and towards the transducer
on spectral analysis you will see flow above and below the line mixture of red and blue, wrap around of color |
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what is spectral broadening
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the diastolic waveform is more indistinct
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when can you seen spectral broadening
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distal to stenosis
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how do you know you have at least 70% stenosis of a BV on US
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if velocity is >230 cm/s
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