Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

DMS 102 > Beths color doppler lecture > Flashcards

Beths color doppler lecture Flashcards

1
Q

color map

hue is ________

A

color observed such as red, blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

color map

saturation is ____________

A

color concentration

(pale, deep)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

color map

luminance is _________

A

color brightness

(dark, bright)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

above baseline on color map means the blood is moving ____________

A

towards the transducer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Color below the black baseline
represent blood that is moving
____________ from the transducer.

A

away

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The darker colors closest to the
baseline represent the blood
flowing with the __________ velocities.

A

lower

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The lighter colors farthest from the
baseline represent the blood
flowing with the ___________ velocities.

A

higher

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Low color Doppler settings will also
cause the color Doppler signal to
appear outside of the blood vessel.
This is called _____________.

A

color bleeding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

increase color scale(PRF) to increase/decrease sensitivity

A

decrease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

do you increase color scale(prf) to evaluate low flow

A

no you decrease it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

things to do if not enough color is seen in vessels

A

increase color gain
decrease color scale
decrease sample box size
make sure box is not at 90 degree angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

color doppler energy is good to show __________

A

perfusion even at low flow states

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

where should the gate be for pulsed wave doppler

A

center of vessel, parallel to walls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The gate should be no larger than ____________ the size of the vessel.

A

1/3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

should you have a smaller or larger gate for arterial waveform

A

smaller

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

how to image the rt and lt portal veins together

long or trans
subcostal or intercostal
notch position

A

trans
subcostal
8 oclock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

how to find left portal vein w ligamentum teres

A

midline
sagittal
fan left(to patients right)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

how to find right portal vein with branches

intercostal or subcostal
long or trans
notch position

A

intercostal
long
11 oclock

will look like Y

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

how to find main portal vein

subcostal or intercostal
long or trans
notch position

A

subcostal
long
10 oclock / 45 degree angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Normal Portal Vein Flow
* Continuous/monophasic hepatopetal flow
* Normal flow velocity 20-30 cm/s
* Flow increases after eating which in turns
decreased HA flow
* Flow decreases when standing or exercising

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what does a Pulsatile Portal Vein suggest?

A
  • Liver disease (?PHTN)
  • Heart problem (look at HV)
  • Can also be seen in a normal patient
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

can you augment for portal vein?

A

yes. press abdomen to help fill the vein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What type of waveform is hepatic veins?

triphasic, biphasic, monophasic

A

triphasic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What type of waveform is portal vein?

triphasic, biphasic, monophasic

A

monophasic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
A normal hepatic vein has hepatofugal flow in the systole and in diastole, but has a short period of hepatopetal flow that represents the atrial kick in end diastole. This gives the hepatic veins a waveform that has a pulsatile “W” appearance
26
why is hepatic veins pulsatile
because of the proximity to the heart
27
what happens to hepatic vein flow form when liver disease exist
it becomes biphasic or monophasic
28
where should you place your gate for hepatic veins
within a couple centimeters from ivc
29
are arterial waveforms high or low resistance
can be either
30
these waveforms have a forward flow in diastole with the signal well above the baseline during diastole.
low resisitance organs like liver, brain, and kidneys
31
these waveforms have little to no flow in the diastole and possibly have reversed early diastolic flow.
high resistance feed muscular beds, distal aorta, common femoral and the external carotid arteries
32
what is Very important to image and Doppler after a liver transplant due to possible occlusion and/or stenosis at or near the anastomotic site
hepatic artery
33
Best place to Doppler the splenic vein is at the ____________.
pancreatic tail
34
SMA has a __________- resistance waveform with NPO status
high
35
The spectral waveform should be obtained with the SMA in the __________ scanning plane.
longitudinal
36
Renal artery has a __________ resistance waveform * Place Doppler cursor in center of vessel.
low
37
Renal veins have fairly steady, minimally ____________ flow
phasic
38
When taking a PW Doppler sample of the splenic vein at the pancreatic tail the waveform should be above or below the baseline
above the baseline
39
When taking a PW Doppler sample of the splenic vein at the splenic hilum, the waveform should be above or below the baseline
below the baseline
40
The main portal vein begins at the
portal confluence
41
What two vessels unite to form the portal confluence?
The splenic vein and SMV
42
The portal confluence can be found
at the level of the pancreatic head
43
Portal vein blood flow towards the liver is
hepatopetal
44
Portal vein blood flow away from the liver is
hepatofugal
45
What three structures make up the portal triad
main portal vein, proper hepatic artery, common hepatic duct
46
The liver receives more blood from the hepatic artery or the portal vein?
Portal vein-70-75%, (Hepatic artery sends only 25-30%)
47
Which vessel supplies greater oxygen needs to the liver
portal vein 50-55% (proper hepatic artery is 45-50%)
48
What AP measurement is the upper limits of normal for the main portal vein
13mm
49
Intersegmental vessels of the liver
Hepatic veins (course between the lobes and segments, interlobar and intersegmental)
50
Intrasegmental vessels of the liver
The portal triad course to the center of each segment (intrasegmental)
51
What makes the portal triad walls more echogenic than the hepatic vein walls
The portal triad is encased by a fibrofatty sheath (Glisson's capsule) giving it hyperechoic walls.
52
Hepatic veins typically display what type of Pulse Doppler waveform?
Triphasic
53
During pulse Doppler analysis of bloodflow, how is blood flow towards the transducer demonstrated during normal spectral analysis of a vessel?
above the baseline
54
During pulse Doppler analysis of bloodflow, how is blood flow away from the transducer demonstrated during normal spectral analysis of a vessel?
below the baseline
55
Can the right hepatic artery originate from the SMA instead of the proper hepatic artery?
Yes it can. Seen in 11% of patients. The replaced RHA will be seen posterior to the main portal vein instead of anterior to it.
56
Can the left hepatic artery originate from the left gastric artery instead of the proper hepatic artery?
Yes it can. Seen in 10% of patients.
57
Does the hepatic artery typically have a high resistance or low resistance Doppler waveform pattern?
Low resistance, however; in a post liver transplant, a high resistance hepatic artery waveform may suggest organ rejection
58
Portal systemic collaterals
venous collaterals that are created to connect the portal system to the IVC in order to bypass the liver
59
Gastroecophageal varices
Collaterals of the distal esophagus and gastric fundus. These collaterals may lead to life-threatening gastrointestinal hemmorhage.
60
Recanalized umbilical vein
A re-opening of the umbilical vein (ligamentum teres) to act as a collateral from the left portal vein to the epigastric veins to the IVC.
61
Splenorenal varices
Tortuous collateral veins seen between the splenic and left renal hilum. For this reason, Doppler of the splenic vein at the pancreatic tail is more accurate in portal hypertension cases than the splenic hilum.
62
Intestinal varices
Veins of retroperitoneal structures such as the colon, duodenum and pancreas anastomose with systemic tributaries.
63
rectal varices (hemorrhoids)
a collateral path in which the inferior mesenteric vein drains into the rectal veins which connect with systemic tributaries
64
physical signs of portal systemic collaterals
1. dilated veins on anterior abd wall 2. Caput Medusa- tortuous collaterals around umbilicus 3. Hemorrhoids 4. Ascites- fluid wav

DMS 102 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions