Difference between revisions of "Doppler ultrasound"
From Radipedia
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Portal vein stenosis - narrowing < 2.5 cm or velocity > 150 cm/s at anastomoses | Portal vein stenosis - narrowing < 2.5 cm or velocity > 150 cm/s at anastomoses | ||
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| + | Hepatic vein stenosis - flattening of the normal triphasic waveform | ||
Latest revision as of 01:12, 8 July 2013
Nonresistive Vessels - high diastolic component for organs that need constant perfusion, internal carotid, hepatic and renal arteries.
Resistive Vessels - litttle to reversed flow in diastole for organs that do not need constant perfusion, external carotid, iliac and brachial arteries.
Resistive Index - compares peak systole to minimum diastole (see diagram).
Transplant Liver
Hepatic artery stenosis - parvus trades waveform or velocity > 200 cm/s
Portal vein stenosis - narrowing < 2.5 cm or velocity > 150 cm/s at anastomoses
Hepatic vein stenosis - flattening of the normal triphasic waveform
