This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which scientific principle is the basis of the thermodilution method used in the measurement of cardiac output 
Select and explain. 
A. Hagen-poiseuille principle, B. Bernoulli's principle, C. Stewart-hamilton principle, D. Universal gas equation
C: Stewart-hamilton principle
Answer: C: Stewart-hamilton principle 
Explanation: 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.