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Questions and Answers
What is the maximum amount of air that can be forcefully exhaled after a normal or resting expiration?
What is the volume of air that can be exhaled from the lungs after a maximum inspiration?
What is the amount of air that the lung can hold after normal expiration?
What is the volume of air remaining in the lungs after a forceful expiration?
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What is the equation for Vital Capacity (VC)?
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What is the volume of air remaining in the lungs after normal expiration?
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What is the relationship between Inspiratory Capacity (IC) and Tidal Volume (TV)?
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What is the difference between Expiratory Reserve Volume (ERV) and Residual Volume (RV)?
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What is the total lung capacity (TLC) equal to?
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What is the maximum volume of air that can be exhaled slowly after slow maximum inhalation?
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What is the largest volume of air that can be breathed out of the lungs in 1 minute?
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What is the volume of expired air in liters per minute measured over a minimum of one minute while breathing normally?
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What is the majority of FVC exhaled in?
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What is the respiratory rate multiplied by in the formula for minute ventilation?
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What is the purpose of dynamic lung tests?
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What is the name of the test that measures the total volume of air that can be exhaled forcefully and rapidly after maximum inhalation?
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What is the primary function of pulmonary function tests?
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What is spirometry?
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What is measured by spirometry?
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What is the difference between lung volumes and capacities?
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What is the Inspiratory Reserve Volume (IRV)?
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What is the Tidal Volume (TV)?
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How many static lung volumes are there?
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What is the total lung capacity?
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Study Notes
Pulmonary Function Tests
- Pulmonary function tests measure how well the lungs take in and release air.
- Spirometry is the most common type of pulmonary function test.
Lung Volumes and Capacities
- Lung volumes are divided into 4 defined volumes and 4 capacities.
- Volumes are integral units, whereas capacities consist of 2 or more volumes.
- Static lung volumes do not depend on the rate at which air flows.
Lung Volumes
- Tidal Volume (TV): volume of air inspired or expired during normal quiet breathing (0.5L).
- Inspiratory Reserve Volume (IRV): maximum amount of air that can be forcefully inspired after a normal tidal volume (3L).
- Expiratory Reserve Volume (ERV): maximum amount of air that can be forcefully expired after a normal or resting expiration (1.2L).
- Residual Volume (RV): volume of air remaining in the lungs after a forceful expiration (1.2L).
Lung Capacities
- Vital Capacity (VC): volume of air that can be exhaled from the lungs after a maximum inspiration (VC = IRV + TV + ERV = 4.7L).
- Inspiratory Capacity (IC): amount of air that the lung can hold after normal expiration (IC = IRV + TV = 3.5L).
- Functional Residual Capacity (FRC): volume of air remaining in the lungs after normal expiration (FRC = ERV + RV = 2.4L).
- Total Lung Capacity (TLC): volume of air in the lungs after a maximum inspiration (TLC = IRV + TV + ERV + RV = 5.9L).
Spirometry Tests
- Forced Vital Capacity (FVC): total volume of air that can be exhaled forcefully and rapidly after maximum inhalation.
- Slow Vital Capacity (SVC): maximum volume of air that can be exhaled slowly after slow maximum inhalation.
- Maximum Voluntary Ventilation (MVV): largest volume of air that can be breathed out of the lungs in 1 minute.
- Minute Ventilation (MV): volume of expired air in liters per minute measured over a minimum of one minute while breathing normally (MV = respiratory rate x tidal volume).
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Description
Assess your knowledge of pulmonary function tests, including spirometry, lung volumes, and capacities. Learn how they measure lung function and breathing capacity.
