Understanding Basic Lung Volume Measures

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Questions and Answers

What is the approximate value of Inspiratory Reserve Volume (IRV) in a normal adult?

  • Around 6,000 mL
  • Around 500 mL
  • Around 3,000 mL (correct)
  • Around 1,200 mL

What is the functional residual capacity (FRC) in terms of other lung volumes?

  • FRC = TLC - VC
  • FRC = TV + IRV
  • FRC = VC - RV
  • FRC = ERV + RV (correct)

What is the total lung capacity (TLC) in terms of other lung volumes?

  • TLC = IRV + ERV
  • TLC = TV + IRV
  • TLC = VC + RV (correct)
  • TLC = FRC + RV

What is the Vital Capacity (VC) in terms of other lung volumes?

<p>VC = TV + IRV + ERV (B)</p> Signup and view all the answers

What is Tidal Volume (TV)?

<p>The volume of air inspired or expired during a normal breath (D)</p> Signup and view all the answers

What does Residual Volume (RV) represent?

<p>The volume of air remaining in the lungs after a maximal expiration (A)</p> Signup and view all the answers

What does Expiratory Reserve Volume (ERV) represent?

<p>The maximum volume of air that can be expired after a normal tidal expiration (D)</p> Signup and view all the answers

What is the Derived Measure Vital Capacity (VC)?

<p>The maximum volume of air that can be moved in or out during a single respiratory cycle (D)</p> Signup and view all the answers

What is Functional Residual Capacity (FRC)?

<p>The volume of air remaining in the lungs at the end of a normal tidal expiration. It is the sum of Expiratory Reserve Volume (ERV) and Residual Volume (RV) (A)</p> Signup and view all the answers

How is Total Lung Capacity (TLC) calculated?

<p>TLC = VC + RV (C)</p> Signup and view all the answers

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Study Notes

Lung Volumes

  • Inspiratory Reserve Volume (IRV) is approximately 3000 mL in a normal adult.

Functional Residual Capacity (FRC)

  • FRC is the sum of Expiratory Reserve Volume (ERV) and Residual Volume (RV).

Total Lung Capacity (TLC)

  • TLC is the sum of Vital Capacity (VC) and Residual Volume (RV).
  • TLC is calculated by adding Inspiratory Reserve Volume (IRV), Tidal Volume (TV), Expiratory Reserve Volume (ERV), and Residual Volume (RV).

Vital Capacity (VC)

  • VC is the sum of Inspiratory Reserve Volume (IRV), Tidal Volume (TV), and Expiratory Reserve Volume (ERV).

Tidal Volume (TV)

  • Tidal Volume (TV) is the volume of air inhaled and exhaled during a normal breathing cycle.

Residual Volume (RV)

  • Residual Volume (RV) represents the volume of air remaining in the lungs after a maximal exhalation.

Expiratory Reserve Volume (ERV)

  • Expiratory Reserve Volume (ERV) represents the volume of air that can be exhaled forcefully after a normal exhalation.

Derived Measures

  • Vital Capacity (VC) is a derived measure that can be calculated from other lung volumes.
  • Functional Residual Capacity (FRC) is a derived measure that can be calculated from other lung volumes.

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