Venous (Quiz ) Flashcards
What are the three different things you can measure with any vessel?
LD: lumen diameter (intimal to intimal layer)
IAD: interadventitial diameter (adventitia to adventitia)
IMT: intimal-medial thickness (outermost intima to outermost media)
What is the standard measurement of vessel diameter?
IAD - interadventitial diameter
What is a spectral doppler tracing?
graphs of velocity over time
What is the most basic information to obtain from a spectral waveform?
PSV and resistivity
When does PSV occur?
at ventricular systole
What does resistivity do?
compares EDV with PSV
Where does the aorta originate?
at left ventricle and terminates at level of umbilicus
List the aortic segments.
aortic root, ascending aorta, aortic arch, descending aorta, abdominal aorta
What is a normal aortic diameter?
normal is less than 2.5cm
ectatic (aka dilation): 2.5-3cm (irregular margins and non-tapering profile)
aneurysmal: >3cm (or focal diameter increase by more than 50% of normal segment
What is the normal PSV of the aorta?
40-100 cm/s
Is the aorta low or high resistive?
typically high
List the major branches of the aorta.
celiac axis (left gastric, common heptic, and splenic), SMA, right and left renal artery, IMA, right and left CIAs
List the minor branches of the aorta.
right and left inferior phrenic arteries, right and left suprarenal arteries, right and left gonadal arteries
Which aortic branches are examined with sonography?
major branches
minor branches are not examined with US
What does the CA supply?
liver, duodenum, stomach, esophagus, spleen, pancreas, omentum
What is the normal PSV of the CA?
<200 cm/s
What is the resistivity of the CA?
low resistivity
What are the main branches of the SMA?
inferior pancreatic, duodenal, colic, ileocolic, intestinal
What does the SMA supply?
pancreasm duodenum, ileum, jejunum, cecum, appendix, ascending and transverse colon
What is the normal PSV of the SMA?
<275 cm/s
What is the resistivity of the SMA?
high resistive in fasting patient
low resistive in non-fasting patient
Where do the renal arteries originate on the aorta?
a few centimeters below the SMA
What is the normal PSV of the renal arteries?
<180 cm/s
What is the resistivity of the renal arteries?
low resistive