ECMO SPECIALIST EXAM WITH 123
QUESTIONS AND VERIFIED ANSWERS
How much NS does it require to prime HLS? - ANSWER: 500 mL total, 1 foot
PVC. 3/8 in tubing: 20 ml Cardiohelp oxy/pump: 273 mL.
Quadrox oxy: 215 mL.
Centrimag and Rotaflow pump: 32 mL.
Lifespark pump: 16 mL.
What is DO2? What four factors control DO2? - ANSWER The amount of oxygen
given to peripheral tissues per minute.
1. Cardiovascular output
2. Hgb concentration.
3. Hgb Saturation
4. Dissolved oxygen.
ANSWER: DO2 = CaO2 x CO x 10*
(10 is constant.)
What is a normal DO2 level? - ANSWER: 1000 mL/min
What is VO2? - ANSWER: The amount of oxygen utilized by the tissues each
minute.
,What three things determine VO2? - ANSWER 1: Cell metabolism (organ specific)
2. Mass and Activity.
3. Thyroid, hypothalamus, and catecholamines.
What is the VO2 (oxygen consumption) formula?
What is a normal VO2? - Answer: VO2 = CO (SaO2 - SvO2) × Hgb x 1.34 x 10.
200–250 ml/min
What variables boost tissue oxygen utilization? - ANSWER: surgical trauma
-Organ failure
-sepsis (50–100%)
-Non-sedated head injury (138%)
-bath (23%)
-turning (31%).
What is svO2? - ANSWER: Venous oxygen saturation.
Measures the oxygen content of blood returning to the right side of the heart after
perfusing the entire body.
Measures "GLOBAL" O2 consumption and what the body uses.
, shows the outcome of both oxygen delivery and consumption at the tissue level.
What is the usual SvO2? - ANSWER: 65%-75%
or
650–750 ml/min
SvO2 formula - Answer: SvO2 = DO2 - VO2.
(delivery – consumption)
What happens when SvO2 falls below 50%? - ANSWER: Anaerobic metabolism
and Lactic Acidosis
What do you name oxygen that is bonded to hemoglobin?
How many milliliters of oxygen are in one gram of hemoglobin? - Answer:
oxyhemoglobin.
1.34 ml
hgb = 1.34 * SaO2
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