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Circulation. 1982;65:380-383

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Circulation, Vol 65, 380-383, Copyright © 1982 by American Heart Association

ARTICLES

Overestimation of pediatric cardiac output by thermal indicator loss

GF Maruschak, AM Potter, JF Schauble and MC Rogers

The accurate measurement of pediatric cardiac output by thermodilution requires that the quantity of cold indicator introduced into the central circulation be known. This study defines an important source of error in the correction factor for the amount of heat gained by small volumes of cold injectate during passage through pediatric catheter systems. This error may result in significant overestimation of cardiac output (as much as 59%) when blood at body temperature is withdrawn into the injection lumen of the pediatric catheter before the injection.




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