<prompt> Which scientific principle is the basis of the thermodilution method used in the measurement of cardiac outputHagen-poiseuille principleBernoullis principleStewart-hamilton principleUniversal gas equation  <response>: 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. 