Which scientific principle is the basis of the thermodilution method used in the measurement of cardiac output: (A) Hagen-poiseuille principle, (B) Bernoulli's principle, (C) Stewart-hamilton principle, (D) Universal gas equation
Answer is C. Thermodilution is an indicator dilution technique. In indicator dilution techniques cardiac output is called using stewart - Hamilton equation.


Cardiac output is equal to the amount of indicator injected divided by its average concentration in arterial blood after a single circulation through the heart, called as stewart Hamilton principle.