16 Questions
What is the Fick equation used to calculate?
Oxygen consumption at the muscle
What is the conversion factor for 1 kg·m/min to kcal/min?
0.00234 kcal/min
What is the equation to convert watts to kg·m/min?
kg·m/min = (watts)(6.12)
What does the Oxyhaemoglobin dissociation curve illustrate?
The relationship between oxygen and hemoglobin saturation
What does the Fick equation calculate if Q = 5 L/min, a-vO2diff = 50 mL/L, and VO2 = ?
250 mL O2/min
What is the output of CO2 if VCO2 expired = 50 L/min and VCO2 inspired = 0.15 L/min?
1.86 L/min
What is the energy expenditure in kcals if the oxygen consumption is 1 L/min?
5 kcals
What does the equation VCO2 = (50 L/min*0.375) - (50 L/min * 0.003) calculate?
Output of CO2
What is the equation for mean arterial pressure (MAP)?
$MAP = \frac{1}{3} SBP + \frac{2}{3} DBP$
What is the formula for ejection fraction (EF), which represents the percentage of blood ejected from the heart?
$EF = \frac{SV}{EDV} \times 100$
What is the equation for resistance in the context of flow and pressure?
$Resistance = \frac{pressure}{flow}$
What does the VD/VT ratio measure in the context of gas exchange efficiency?
Alveolar ventilation efficiency
What does the a-vO2diff (arterial venous oxygen) represent?
Difference in oxygen content between arterial and venous blood
What is the formula for mechanical efficiency, expressed as a percentage?
$\text{Mechanical efficiency} = \frac{\text{external work accomplished}}{\text{energy expended (VO2)}} \times 100$
What is the formula for gross efficiency, where WR represents work rate in kg·m/min?
$\text{Gross efficiency} = \frac{WR \times 0.00234 , \text{kcal/min}}{VO2 \times 5 , \text{kcal/L O2/min}}$
What is the equation for net efficiency, where (VO2,2-VO2,1) represents the change in oxygen consumption?
$\text{Net efficiency} = \frac{WR \times 0.00234}{(VO2,2-VO2,1) \times 5}$
Test your knowledge of cardiovascular equations and calculations with this quiz. From cardiac output to resistance and pressure, challenge yourself with questions on stroke volume, heart rate, and more.
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