What is this patient's cardiac output? The following measurements were obtained in a male patient: Heart rate: 70 beats/min, Pulmonary vein [0 = 0.24 ml 02/m1, Pulmonary artery [0 = 0.16 ml 02/ml, Whole body 02 consumption: 500 ml/min.
A. 1.65 L/min B. 4.55 L/min C. 5.00 L/min D. 6.25 L/min E. 8.00 L/min
The correct answer here would be arrived at by dividing the total oxygen consumption by the arteriovenous oxygen gradient, according to what I could find on the internet about this kind of calculation.
Now, I’m not an expert in nursing or in these measurements, so I cannot tell you which measurements are needed out of what is given. If I look at the previous answer, they got 6.25 L/min, or answer D, and they used all of the measurements given.
In light of this, I am almost positive that answer D is the correct answer, especially as I have not found a calculator that asks for these specific measurements when calculating the cardiac output of a patient with the provided numbers.
6.25 l/min-cardiac output is calculated by the fick principle if whole body oxygen
(02) consumption and  in the pulmonary artery and pulmonary vein are measured. mixed
venous blood could substitute for a pulmonary artery sample, and peripheral arterial blood could
substitute for a pulmonary vein sample. heart rate is not needed for this calculation.
cardiac output = 500 ml/min_______________
0.24 ml 02/ml 0.16 ml 02/ml
= 6250 ml/min or 6.25 l/min