IV Access Flashcards Preview

CPS New > IV Access > Flashcards

Flashcards in IV Access Deck (23)
Loading flashcards...
1

Describe an over the needle cannula

- Cannula over needle
- Whole set introduced into blood vessel
- Cannula slid off needle
- Relatively stiff

2

Describe a through the needle cannula

- Large insertion needle with cannula passed through
- Used in central veins

3

Describe a Peel away cannula

Place through an over the needle cannula

4

Describe a seldinger cannula

(Over the wire cannula)
- IV cannula
- Wire passed down cannula and vasodilator administered
- Cannula 1 removed and longer and more flexible cannula replaces it

5

Describe the chemical, physical and biological properties of cannula material

Chemical - stable on sterilisation and implantation
Biological - Non irritant, non thrombogenic, resists microbial adhesion
Physical - High tensile strenth, flexible but not compressible

6

Give an example of a material that is good for making cannulas

Silicone elastomes

7

What effect can the shape and sharpness have on the effect of a cannula on the body

Can play a role in reducing endothelial trauma
Rounded Tips preferable to square /bevel ended

8

Describe the placement of a cannula in the ceplallic vein

- Runs down the dorsal aspect of the forelimb
- Comes in laterally
- Start distally and can then move to a higher site if unable to cannulate

9

Describe the placement of a cannula in a saphenious vein

Obvious veins on the caudolateral end of the hind limb - above the hock
- Must be in lateral recumbency (require assistance)

10

Describe the placement of a cannula in the Jugular vein

Dogs - Straight line from thoracic index to jaw
Horses - within jugular groove
(Use for long term cannulation)

11

Describe the placement of a cannula in the Auricular vein

Along the lateral edge of the ear

12

What could be used as a local anaesthetic for cannula placement?

Emla Cream

13

What gauge of cannula would you use for small cats and rabbits?

22 gauge (blue)

14

What gauge cannula would you use for cats and most other animals?

20 Gauge (pink)

15

What gauge needle would you use in dogs over 20kg?

18 gauge (green)

16

Describe the maintenance of cannulas in patients

Check regularly and flush every 6 hrs with heparinised saline
Swab ports prior to injection

17

Describe 6 problems with equine cannulas

Extravasation (leaking of IV fluids into extravascular tissues)
Thrombosis
Thrombophlebitis (inflammation of vein)
Infection
Emboli

18

Define Ambulatory infusion

Animal is freely mothin without need for tethe to connect catheter (fitted with jackets)

19

Define biocompatibility

Good toleration of implanted tissues

20

Define biofilm

Coating which develops on implanted materials derived from the animals tissue fluids and cells

21

Define dishecence

Bursting open or splitting along natural or sutured lines

22

Define friction coefficient

Surface coefficient influences how easily a catheter can be inserted into a blood vessel

23

Define cannula septum

The thick polymer diphragm allowing sealing a vascular access