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Tempkin Ch 13
abdominal sonography
Term | Definition |
---|---|
duplex sonography | real-time imaging and pulsed doppler capabilities used either simultaneously or sequentially. |
low resistance vessels | arteries supplying organs that demand constant forward blood flow or perfusion |
high resistance vessels | arteries with low or reversed flow in diastole that supply organs that do not demand constant blood perfusion |
doppler spectral waveform | provides information about blood flow velocity, flow direction, presence of flow disturbance or turbulence, and vascular impedance |
systolic winndow | relatively signal free area between the arterial doppler shift signal and the baseline during the systolic portion of a doppler spectral display |
hepatopetal | flow direction toward the liver |
hepatofugal | flow direction away from the liver |
spectral broadening | an increase in returned echoes proportional to an increase in turbulence or flow disturbance |