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5 Cards in this Set
- Front
- Back
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what equation given the PiO2?
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PiO2= FiO2 - (Atm -47)
Atm: atmospheric pressure 47: saturated vapour pressure of water at body temperature of 37 degrees |
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What equation desribes the alveolar PO2?
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alveolar PO2 = PiO2 - alveolar PCO2/R
R: respiratory exchange ratio (usually =0.8), given by CO2 production / O2 consumption |
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Define shunt
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it is the blood that enters the arterial system without going through the ventilated regions of the lungs
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mention some examples of physiological shunt (normally present in the body)
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1- bronchial ciruculation blood that drains directly into the pulmonary veins
2-coronary venous blood draining directly into the left ventricle |
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What is mixed venous blood?
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deoxygenated blood taken from the pulmonary arteries
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