Brainscape's Knowledge GenomeTM

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


See full index

VASCULAR 4 > 1.5 Renal Dialysis Fistulas & Grafts > Flashcards

1.5 Renal Dialysis Fistulas & Grafts Flashcards

1
Q

What is the most common Brescia-Cimino fistula presentation?

A

Anastomosing the side of a radial artery to the end of a cephalic vein. (most common)
or
The brachial artery to cephalic or basilic vein

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

Reasons for doppler Ultrasound? (9)

A
  1. Inadequate dialysis
  2. Thrombosed access
  3. Perigraft mass
  4. UE welling
  5. Decreased thrill or pulse
  6. Suspected steal
  7. Infection
  8. Bleeding
  9. Post revison follow up
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the methods of evaluation?

3) (one more common

A

Most common = Duplex ultrasound
Arteriography
Fistulography

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

What frequency probe is preferred for duplex ultraosund

A

10-12Mhz

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

Do you want high or low flow settings for the Ultrasound?

A

High

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

Why do you need to decrease color gain?

A

To minimize bruit

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

What position should the patient be in for duplex ultrasound

A

Supine

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

What does the doppler angle need to be?

A

60 degrees

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

Record PSV at the native artery prox, the ______, ___,____, _______ (4)

A

arterial anastomosis, graft, venous anastomosis, venous outflow

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

With an AV fistula how many sites should be sampled distal to arterial anastomosis?

A

2-3 sites

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

What is the volume flow rate formula?

A

Volume flow rate (q) ml/min = TAV (Time average velocity) x area (cross sectional area of the vessel) x 60 (60 seconds)
Q= TAV x area x 60

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

To rule out steal from native circulation with duplex what do you look for?

A

Retrograde flow in the inflow artery distal to the anastomosis

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

Which vessel is there a high occurrence of thrombus in dialysis graft patients?

A

Subclavian vein

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

Which exam is used to rule out central vein thrombosis?

A

UE DVT scan

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

What does a normal Arterial limb waveform look like?

A

1) High velocity
2) continuous forward flow through diastole
3) Marked spectral broadening

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

What does a normal venous limb waveform look like?

A

1) slightly lower velocity than arterial

2) most common site of stenosis/ thrombosis

17
Q

What is the Normal PSV for grafts/AV fistulas

A

PSV= 100-400 cm/s

18
Q

What is the Normal EDV for grafts/AV fistulas

A

EDV= 60- 200 cm/s

19
Q

Normal grafts and AV fistulas have ____ flow and ____ resistance

A

high;low

20
Q

will color flow be seen in an graft with an occlusion?

A

No

21
Q

With an occlusion There will be no flow in vein_______ to the fistula

A

distal

22
Q

_________ resistance flow will be seen in the artery leading to the graft or fistula

A

High

23
Q

____ venous outflow with an occlusion from a graft or fistula

A

low

24
Q

> 50% stenosis in GRAFT & FISTULA has a PSV of greater than..

A

> 400 cm/s

25
Q

> 50% stenosis in GRAFT & FiSTULA has a velocity ratio of greater than…

A

> /= 2:1

26
Q

> 75% stenosis in GRAFT& FISTULA has a velocity ratio of greater than…

A

> /= 3:1

27
Q

Velocity values may be unreliable due to variations in vein _________ and limited when estimating doppler angle in __________fistuala’s anastomosis

A

diameter; tortuous

28
Q

Graft Flow volume with poor dialysis, pending graft failure

A

<300 ml/min

29
Q

Graft Flow volume < 500ml/min means?

A

Increased risk of graft failure

30
Q

Graft Flow volume & AV FISTULA normal range?

A

> 800 ml/min

31
Q

Graft Flow volume with possible congestive heart failure?

A

> 1500 ml/min

32
Q

AV fistula adequate dialysis has a flow volume of greater than _____ with _____mm outflow vein

A

500; 4

33
Q

What is the most common abnormality in renal dialysis, fistulas and grafts

A

Venous anastomosis stenosis (50-90%)

34
Q

Other abnormalities include in renal dialysis, fistulas and grafts(8)

A
  1. Venous outflow obstruction
  2. Pseudoanerysm
  3. Diffuse aneurismal dilation
  4. hematoma
  5. perigraft abcess
  6. Hematoma
  7. Intimal flaps (from needle punctures)
  8. Arterial anatomic stenosis (15%)
35
Q

Ultrasound maybe used to identify/monitor grafts and lesions as well as (3)

A
  1. baseline exam for F/U studies
  2. Assess maturity of an AV fistula/graft
  3. Identify grafts in jeopardy of failure

VASCULAR 4 (8 decks)

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