Doppler Flow Patterns in Abdominal Vessels

Question 1

Aorta (proximal)

Answer 1

Proximal AA above the renal arteries: high systolic peak and a low diastolic component
Little spectral broadening (turbulence) is evident
Clear spectral window: plug flow

Question 2

Aorta (distal)

Answer 2

Distal AA below the renal arteries:
flow with a small, reversed component during diastole
closer to the iliac vessels, the greater the reverse component becomes
Trisphasic

Question 3

Distal Aorta is

Answer 3

Triphasic

Question 4

high impedance of the peripheral circulation causes what

Answer 4

the distal aorta flow to become triphasic

Question 5

Celiac Axis

Answer 5

Systolic flow with spectral broadening (turbulence) in diastole with no change after eating

Question 6

Celiac axis gives rise to what

Answer 6

common hepatic
splenic
left gastric

Question 7

what view is preferred for the celiac axis

Answer 7

Longitudinal

Question 8

what kind of flow is celiac axis

Answer 8

Low resistance flow pattern with continuous forward flow through diastole to provide constant blood to liver and spleen

Question 9

Celiac axis resembles what other waveforms

Answer 9

Splenic and hepatic

Question 10

Normal blood flow velocity for celiac

Answer 10

98-105cm/s

Question 11

The mesenteric network contains what

Answer 11

Lots and lots of collaterals

Question 12

Splenic artery

Answer 12

tortuous course
along the posterosuperior margin of the pancreatic
body and tail

Question 13

Splenic artery waveform display

Answer 13

Usually displays spectral broadening

Question 14

The splenic waveform has a similar appearance to

Answer 14

celiac axis (Low resistance flow pattern with the continuous forward diastolic flow)

Question 15

Hepatic arterial system

Answer 15

Low resistance flow characteristics

Question 16

blood flow in portal vein and proper hepatic artery

Answer 16

Both hepatopetal

Question 17

SMA banches supply what

Answer 17

jejunum, ileum, cecum, and ascending
colon, and the proximal two-thirds of the transverse
colon and portions of the duodenum and
pancreatic head.

Question 18

IMA branches supply what

Answer 18

distal colon (distal
third of the transverse colon, descending colon,
and sigmoid colon) and proximal rectum.

Question 19

SMA and IMA spectral waveforms show

Answer 19

mild spectral broadening near their origins

Question 20

In fasting patient, SMA and IMA

Answer 20

high-resistance flow pattern
sharp systolic
Sharp peaks and little diastolic flow. These waveforms
commonly show slight reversal of blood flow early
in diastole

Question 21

30-90 minutes after eating

Answer 21

SMA and IMA develop low resistance flow pattern with broad systolic peaks and continuous diastolic flow

Question 22

why does waveform of SMA and IMA change after eating

Answer 22

Vasodilation that occurs in mesenteric vascular beds after digestion

Question 23

Mesenteric studies should be done

Answer 23

Fasting

Question 24

Normal peak velocity SMA

Answer 24

97-142cm/s

Question 25

normal peak systolic velocity of IMA

Answer 25

70-200cm/s

Question 26

Multiple renal arteries

Answer 26

Seen in approximately 10% of patients

Question 27

Normal peak systolic velocity of renal artery

Answer 27

60-100cm/s

Question 28

renal artery waveforms

Answer 28

low-resistance flow pattern with a rapid systolic upstroke Continous forward flow in diastole due to low resistance in renal vascular bed

Question 29

where is renal flow pattern evident

Answer 29

all parts of the kidney