Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A_arterial duplex and indirect > Duplex/CDI UE > Flashcards

Duplex/CDI UE Flashcards

1
Q

capabilities

A

localize stenosis / occlusion
localize aneurysm
post-op f/u - BPG , AVF, STENT

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

limitations (1)

limitations specific to AVF (2)

A
  1. cast/ IVsite
  2. graft angulation
  3. increased collateral formation causes difficulty evaluating the outflow vein
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Pt. position

A

supine

pledge position, arm rotated out 45 degrees

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

Physical principles:

what is ideal sample size for Doppler analysis

A

1-1.5 mm

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

Physical principles:

with CDI frequency of signal is assigned a ____ or _____ of color

A

hue or shade of color

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

Physical principles:

what frequency probe is used

A

5-7 MHz linear array

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

it is uncommon for UE arteries to become ____. Most common artery in UE eval to have this disease process is

A

stenosed

subclavian artery

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

most common indication for UE exam

A

evaluation of dialysis access grafts

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

dyalysis is accomplished by

A

communication of artery and vein,

creating high blood volume situation

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

a thrill is

A

vibration

it is palpated

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

a bruit is

A

noise

it is auscultated

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

what hemodialysis access condition commonly causes a thrill

A

stenosis

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

steps for eval of dialysis access graft :

7

A

inflow artery

arterial anastomosis

body of graft

observe aneurysm, puncture sites, peri-

graft fluid

use color to observe flow changes/ turbulence

venous anastomosis

outflow vein

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

Brescia-Cimino is connection of what typically

assessment sites include

A

cephalic vein and radial artery

inflow artery
anastomosis
outflow vein
radial artery Doppler

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

Autogenous Fistula is

A

any artery attached to any adjacent vein that includes native vessels
eg- Brescia Cimino

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

identify two types of synthetic dialysis grafts

A

loop graft _ loop connection between artery and vein

straight graft - runs through arm connects artery and vein

17
Q

Thrill is usually a sign of stenosis, but in dialysis graft it is a ____ finding

A

normal

because of the high volume of blood flowing through the anastamosis

18
Q

what are you r/o in dialysis access

annnnnd how do you accomplish that

A

steal syndrome
plaque
stenosis
patient anastamosis, inflow and outflow veins

run Doppler through

19
Q

normal AVF

A

normal PSV varries, waveform us usually multiphasic

20
Q

parameters for > 50% stenosis

A

stenosis PSV : Prox vessel PSV

2:1 ratio

flow acceleration post stenosis turbulance

21
Q

complete occlusion is proved by

A

no detection of CDI or Doppler
B-mode shows narrowing

“thump” prox to occlusion

dampened WF distal to occlusion when collateral flow is present

22
Q

Aneurysm is proved by

A

dilation of the vessel >1.5 x size of adjacent segment

23
Q

what is the most common aneurysm site

A

subclavian artery

usually associated with distal embolization of the digits

24
Q

ulnar artery aneurysm is called

A

Hypothenar Hammer Syndrome

occupational injury repetitive use
eg jack hammer
causes aneurysm or thrombosis of ulnar artery (usually at palmar arch)

25
Q

interpretation of Hemodialysis Access

normal waveform

A

disturbed , low resistance , high velocity flow

eg PSV > 150 cm/sec

comparison to previous studies is key

PHASE NOT USED TO DESCRIBE DIALYSIS AVF -either high resistant or low resistance

26
Q

interpretation of Hemodialysis Access

most common site for stenosis is

A

outflow vein

due to hyperplasia or elevated arterial pressure

27
Q

interpretation of Hemodialysis Access

low PSV in access graft can indicate ______ problems

A

inflow

will look like dampened waveform will indicate problem in the inflow artery

28
Q

other hemodynamic complications of AVF

2

A

CHF

steal syndrome

29
Q

how can AVF cause CHF

A

large blood vol in venous circulation can increase venous return
= CHF

30
Q

what is steal syndrome

A

distal arterial blood flow is reversed (shunted) into venous flow

creates pallor and coolness of the skin distal to the shunt and eventually ischemia

31
Q

explain procedure for eval of steal syndrome

A

with dialysis access open and functioning use PPG to eval flow to at least 2 digits one at a time

manually compress dialysis access and retake digit PPG tracings or Pa

32
Q

if flow improves after compressing the AVF than it is positive or negative for steal syndrome

A

positive

There will be retrograde flow in outflow arterial vessel below venous anastamosis

if flow stays the same during compression than another cause of ischemia should be investigated

A_arterial duplex and indirect (13 decks)

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