ECLS / ADULT ECMO EXAM
PRACTICE QUESTIONS AND
ANSWERS
Describe how a microporous hollow fiber oxygenator works? - Answer- Microporous
polypropylene* fibers contain the gas and are wound a core to maximize contact with
blood
2****Surface tension keeps plasma from leaking into gas phase; also small holes in the
fibers are quickly plugged with **SERUM proteins so there is no direct blood-gas
interface
What is the inner diameter of a polypropylene hollow fiber? - Answer- ~240 microns
2. These oxygenators last up to 6 hours
What are advantages to hollow fiber compared to silicon?
5 things I should know - Answer- 1. Less platelet and plasma protein consumption
2. More effective gas exchange
3. Lower resistance to blood flow
- facilitates use of centrifugal pump
4. small priming volumes
5. coateed with thrombo-resistant materials
Describe Polymethylpentene hollow fibers
1. Surface area of this oxygenator
2. how is gas transfer?
3. Low what?
, 4. how long can it be used for
5. are they used nowadays?
6. What is the main issue with these? - Answer- 1. 1.8m^2
2. highly gas permeable
3. Low resistance
4. does NOT wet out and can be used for long periods of time
- manufacture still says 6 hours
5. Popular Today
6. Main issue is clots
The Quadrox PMP is what kind of oxygenator?
- what should I remember about it? - Answer- PMP
- Polymethylpentene
Uses a Cross lookin' flow patten
Gas flows straight down through the water and blood flows
What is the all in one (der)? - Answer- Nautilus Smart
from medtronic
What is coated on ECMO oxygenators?
2 categories
2 things in each category
*KNOW EM - Answer- Bio-mimetic surfaces
- makes oxygenators less sticky
1. Bio-activce
- Heparin
- Nitric Oxide
2. Bio-Passive
PRACTICE QUESTIONS AND
ANSWERS
Describe how a microporous hollow fiber oxygenator works? - Answer- Microporous
polypropylene* fibers contain the gas and are wound a core to maximize contact with
blood
2****Surface tension keeps plasma from leaking into gas phase; also small holes in the
fibers are quickly plugged with **SERUM proteins so there is no direct blood-gas
interface
What is the inner diameter of a polypropylene hollow fiber? - Answer- ~240 microns
2. These oxygenators last up to 6 hours
What are advantages to hollow fiber compared to silicon?
5 things I should know - Answer- 1. Less platelet and plasma protein consumption
2. More effective gas exchange
3. Lower resistance to blood flow
- facilitates use of centrifugal pump
4. small priming volumes
5. coateed with thrombo-resistant materials
Describe Polymethylpentene hollow fibers
1. Surface area of this oxygenator
2. how is gas transfer?
3. Low what?
, 4. how long can it be used for
5. are they used nowadays?
6. What is the main issue with these? - Answer- 1. 1.8m^2
2. highly gas permeable
3. Low resistance
4. does NOT wet out and can be used for long periods of time
- manufacture still says 6 hours
5. Popular Today
6. Main issue is clots
The Quadrox PMP is what kind of oxygenator?
- what should I remember about it? - Answer- PMP
- Polymethylpentene
Uses a Cross lookin' flow patten
Gas flows straight down through the water and blood flows
What is the all in one (der)? - Answer- Nautilus Smart
from medtronic
What is coated on ECMO oxygenators?
2 categories
2 things in each category
*KNOW EM - Answer- Bio-mimetic surfaces
- makes oxygenators less sticky
1. Bio-activce
- Heparin
- Nitric Oxide
2. Bio-Passive
