Bruce's Embolus and filtration Final prep Flashcards Preview

Perfusion Program Fall 2014 > Bruce's Embolus and filtration Final prep > Flashcards

Flashcards in Bruce's Embolus and filtration Final prep Deck (19)
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1

Emboli are divided into 3 categories, what are they ?

-Biological
-Foreign materials
-Gases

2

Fat emboli (SCADS) are generated from what ?

denaturation of lipoproteins

3

what is an "oily layer" floating at the top of the reservoir?

melted fat from the bovie

4

what is a "rusty red granular sediment" in the cardioplegia line?

?

5

Platelet size =

1-2 um

6

Erythrocyte size =

10 - 15 um

7

Leukocyte size =

10 - 15 um

8

2 mechanisms of filtration =

Impaction &
adsorption

9

Filters efficiency increases as ?

the Flow path becomes longer and narrower.

10

Observations with Depth filtration ?

microviscosity of stored blood > fresh blood

11

Mechanisms of screen filtration ?

Direct interception

12

Virus size ?

.01 um

13

Bacteria size ?

.5 - 1 um

14

Gas line filters are ?

hydrophobic, position above the level of the oxygenator.

15

Bubble Boyancy principal
"Flow Velocity"

V=Flow rate (Q) / Flow area (A)

16

Bubble Point Pressure Principal formula ?

P = 4Y / D

17

Depth or screen filters cannot filter the following 2 things.

Virus = .01 um
Bacteria = .5 - 1 um

18

Membrane filters filtration rating.

0.2 um

19

Membrane filters 3 mechanisms of filtration

- direct interception
- adsorption
- charge interactions