Left to Right Shunts and their Calculation Ghada ... - CardioEgypt.com
Left to Right Shunts and their Calculation Ghada ... - CardioEgypt.com
Left to Right Shunts and their Calculation Ghada ... - CardioEgypt.com
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3/18/2013<br />
Concept<br />
• The <strong>to</strong>tal uptake (or release) of a substance<br />
by an organ is the product of blood flow <strong>to</strong><br />
that organ <strong>and</strong> the concentration difference<br />
of the substance in the arteries <strong>and</strong> veins<br />
leading in<strong>to</strong> <strong>and</strong> out of that organ<br />
Fick Oxygen Method<br />
• As applied <strong>to</strong> lungs, the substance<br />
released <strong>to</strong> the blood is oxygen<br />
>> oxygen consumption is the product of<br />
arteriovenous difference of oxygen across<br />
the lungs <strong>and</strong> pulmonary blood flow<br />
Q p =<br />
Oxygen consumption<br />
Arteriovenous O 2 difference<br />
Baim DS: Grossman’s Cardiac Catheterization, Angiography, <strong>and</strong> Intervention. 7 th Edition. Lippincot Williams<br />
<strong>and</strong> Wilkins, 2007.<br />
16
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