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 />
Cardiac Output Measurement<br />
Thermodilution Method<br />
CO =<br />
V I (T B -T I ) (S I x C I / S B x C B ) x 60<br />
<br />
<br />
0<br />
T B dt<br />
V I = volume of injectate<br />
S I , S B = specific gravity of injectate <strong>and</strong> blood<br />
C I , C B = specific heat of injectate <strong>and</strong> blood<br />
T I = temperature of injectate<br />
T B = change in temperature measured downstream<br />
Baim DS: Grossman’s Cardiac Catheterization, Angiography, <strong>and</strong> Intervention. 7 th Edition. Lippincot Williams<br />
<strong>and</strong> Wilkins, 2007.<br />
Cardiac Output Measurement<br />
Thermodilution Method<br />
• Advantages<br />
– Withdrawal of blood not necessary<br />
– Arterial puncture not required<br />
– Indica<strong>to</strong>r (saline or D5W)<br />
– Virtually no recirculation, simplifying <strong>com</strong>puter<br />
analysis of primary curve sample<br />
Baim DS: Grossman’s Cardiac Catheterization, Angiography, <strong>and</strong> Intervention. 7 th Edition. Lippincot Williams<br />
<strong>and</strong> Wilkins, 2007.<br />
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