Pulmonary: Ventilation+Capacities

Question 1

Tidal Volume

Answer 1

• Volume of gas inhaled or exhaled during a normal resting breath

Question 2

Inspiratory Reserve Volume

Answer 2

• Volume of gas that can be inhaled beyond a normal resting tidal inhalation

Question 3

Expiratory Reserve Volume

Answer 3

• Volume of gas that can be exhaled beyond normal resting tidal exhalation

Question 4

Residual Volume

Answer 4

• Volume of gas that remained in the legs after expiratory reserve volume has been exhaled

Question 5

Inspiratory Capacity=Inspiratory Reserve Volume+Tidal Volume

Answer 5

• The amount if air that can be inhaled from the resting end expiratory position

Question 6

Vital Capacity=Inspiratory reserve volume+tidal volume+expiratory reserve volume

Answer 6

• The amount of air under volitional control

- Conventionally measured as forced expiratory vital capacity

Question 7

Functional Residual Capacity=Expiratory reserve volume+Residual Volume

Answer 7

• The amount of air that resides in the lungs after a normal resting tidal exhalation

Question 8

Total Lung Capacity=IRV+TV+ERV+RV

Answer 8

• The total amount of air that is contained within the thorax during a maximum inspiratory effort

Question 9

Flow Rates: Forced expiratory volume in 1 second or FEV1

Answer 9

• The amount of air exhaled during the first second of FVC

- In the healthy person at least 70% of FVC is exhaled within the first second

Question 10

Flow Rates: Forced Expiratory Flow Rate

Answer 10

• Slope of a line drawn between 25% and 75% of exhaled volume on a forced vital capacity exhalation curve
• More specific to smaller airways
• Shows a more dramatic change with disease than FEV1