Difference between revisions of "Doppler ultrasound"

From Radipedia
Jump to: navigation, search
 
Line 10: Line 10:
  
 
'''Resistive Index''' - compares peak systole to minimum diastole (see diagram).
 
'''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

Revision as of 01:07, 8 July 2013

Resistive Index
Normal Doppler


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