Quantitation of right-to-left shunting by double indicator and oxygen techniques.


An improved double indicator technique for quantitating right-to-left shunting has been validated in a canine right-heart bypass shunt model and compared to standard O2 shunt measurements in the same preparation. A bolus of dissolved sulfur hexafluoride (SF6) and indocyanine green dye (ICG) is injected into systemic venous return and a single, time-averaged… (More)


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