DSA: Lung Volumes and Capacities Flashcards
What is the physiological unit of the lung?
Alveolar-capillary unit
Which of the following correctly explains Tidal Volume?
A. Volume of air that cannot be forced out no matter what
B. Additional volume that can be inhaled
C. The amount of air inspired or expired in a single breath
D. Maximum volume to which lungs can be expanded
The amount of air inspired or expired in a single breath
Which of the following correctly explains Residual Volume?
A. Volume of air that cannot be forced out no matter what
B. Additional volume that can be inhaled
C. The amount of air inspired or expired in a single breath
D. Maximum volume to which lungs can be expanded
Volume of air that cannot be forced out no matter what
Which of the following correctly explains Inspiratory Reserve Volume?
A. Volume of air that cannot be forced out no matter what
B. Additional volume that can be inhaled
C. The amount of air inspired or expired in a single breath
D. Maximum volume to which lungs can be expanded
E. Additional volume that can be exhaled
Additional volume that can be inhaled
- note this is beyond the Tidal Volume
Which of the following correctly explains Expiratory Reserve Volume?
A. Volume of air that cannot be forced out no matter what
B. Additional volume that can be inhaled
C. The amount of air inspired or expired in a single breath
D. Maximum volume to which lungs can be expanded
E. Additional volume that can be exhaled
Additional volume that can be exhaled
Which of the following correctly explains Total Lung Capacity?
A. Volume of air that cannot be forced out no matter what
B. Additional volume that can be inhaled
C. The amount of air inspired or expired in a single breath
D. Maximum volume to which lungs can be expanded
E. Additional volume that can be exhaled
Maximum volume to which lungs can be expanded
Which of the following respiratory capacitiescan be described as the amount of air that remains in the lungs following normal expiration?
A. Functional Residual Capacity (FRC)
B. Vital Capacity
C. Inspiratory Capacity
D. Total Lung Capacity
Functional Residual Capacity (FRC)
Which of the following respiratory capacitiescan be described as the capacity of air that can be maximally inspired following a normal exhale?
A. Functional Residual Capacity (FRC)
B. Vital Capacity
C. Inspiratory Capacity
D. Total Lung Capacity
Inspiratory Capacity
Which of the following equations would help determine the Vital Capacity?
A. Vt+IRV
B. IRV + Vt + ERV
C. ERV + RV
D. IC + FRC
IRV + Vt + ERV
NOTE: also IC + ERV because IC is IRV+VT
Which of the following equations would help determine the Functional Residual Capacity?
A. Vt+IRV
B. IRV + Vt + ERV
C. ERV + RV
D. IC + FRC
ERV + RV
Which of the following equations would help determine the Inspiratory Capacity?
A. Vt+IRV
B. IRV + Vt + ERV
C. ERV + RV
D. IC + FRC
Vt+IRV
What is typically a normal Tidal Volume?
500 mL
What 3 volumes or capacities cannot be determined with spirometry?
Functional Residual Capacity
Residual Volume
Total Lung Capacity
Look at this and know it
Cool
What influences Lung Volumes?
Boy Size
Age
Posture
Sex
Ethnicity
Obesity
Pulmonary Disease
Obesity causes reduction of all static volumes except which of the following?
A. Expiratory Reserve Volume
B. Functional Reserve Capacity
C. Tidal Volume
D. None of the above
Tidal Volume
NOTE: the other two options are especially reduced with obesity
T/F: When supine FRC is reduced?
True
Explain how we measure residual volume?
We inhale air with a known concentration (C1), like helium and from a known volume (V1). Once equilibrium is reached we exhale and determine the change in concentration (C2) which allows us to determine V2. V2 is our Functional Residual Capacity
T/F: Body plethysmography determines FRC via pressure changes
true
Nitrogen Wash-out technique requires the individual to breath 100% O2 through a one way valve, that is then collected after expiration. This air is monitered until N2 reaches zero. Then the total volume of all gas expired is determined and multiplied by % of N2 in mixed expired air. What is this technique used to measure?
Functional Residual Capacity
