Cardiovascular Equations and Calculations Quiz
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Questions and Answers

What is the Fick equation used to calculate?

  • Oxygen consumption at the muscle (correct)
  • Blood flow to the muscle
  • Carbon dioxide production at the muscle
  • Oxygen saturation in the blood

    • What is the conversion factor for 1 kg·m/min to kcal/min?

  • 0.00234 kcal/min (correct)
  • 0.00198 kcal/min
  • 0.00456 kcal/min
  • 0.00345 kcal/min

    • What is the equation to convert watts to kg·m/min?

  • kg·m/min = (watts)/(4.18)
  • kg·m/min = (watts)/(6.12)
  • kg·m/min = (watts)(6.12) (correct)
  • kg·m/min = (watts)(4.18)

    • What does the Oxyhaemoglobin dissociation curve illustrate?

    <p>The relationship between oxygen and hemoglobin saturation</p> Signup and view all the answers

    What does the Fick equation calculate if Q = 5 L/min, a-vO2diff = 50 mL/L, and VO2 = ?

    <p>250 mL O2/min</p> Signup and view all the answers

    What is the output of CO2 if VCO2 expired = 50 L/min and VCO2 inspired = 0.15 L/min?

    <p>1.86 L/min</p> Signup and view all the answers

    What is the energy expenditure in kcals if the oxygen consumption is 1 L/min?

    <p>5 kcals</p> Signup and view all the answers

    What does the equation VCO2 = (50 L/min*0.375) - (50 L/min * 0.003) calculate?

    <p>Output of CO2</p> Signup and view all the answers

    What is the equation for mean arterial pressure (MAP)?

    <p>$MAP = \frac{1}{3} SBP + \frac{2}{3} DBP$</p> Signup and view all the answers

    What is the formula for ejection fraction (EF), which represents the percentage of blood ejected from the heart?

    <p>$EF = \frac{SV}{EDV} \times 100$</p> Signup and view all the answers

    What is the equation for resistance in the context of flow and pressure?

    <p>$Resistance = \frac{pressure}{flow}$</p> Signup and view all the answers

    What does the VD/VT ratio measure in the context of gas exchange efficiency?

    <p>Alveolar ventilation efficiency</p> Signup and view all the answers

    What does the a-vO2diff (arterial venous oxygen) represent?

    <p>Difference in oxygen content between arterial and venous blood</p> Signup and view all the answers

    What is the formula for mechanical efficiency, expressed as a percentage?

    <p>$\text{Mechanical efficiency} = \frac{\text{external work accomplished}}{\text{energy expended (VO2)}} \times 100$</p> Signup and view all the answers

    What is the formula for gross efficiency, where WR represents work rate in kg·m/min?

    <p>$\text{Gross efficiency} = \frac{WR \times 0.00234 , \text{kcal/min}}{VO2 \times 5 , \text{kcal/L O2/min}}$</p> Signup and view all the answers

    What is the equation for net efficiency, where (VO2,2-VO2,1) represents the change in oxygen consumption?

    <p>$\text{Net efficiency} = \frac{WR \times 0.00234}{(VO2,2-VO2,1) \times 5}$</p> Signup and view all the answers

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