HUF2-1 Mechanics of ventilation

When could the highest transpulmonary pressure be reached?

• At end of expiration

• During inspiration

• At end of inspiration

• During expiration

• Right after pneumothorax is induced

The lung has the tendency to recoil

• At end of expiration

• During inspiration

• At end of inspiration

• During expiration

• All the time

[Modified from FA] A man is stabbed with a knife 3cm deep in the 5th intercostal space. His chest wall will

• collapse in

• expand out

• sometimes collapse in sometimes collapse out

• not change

• cannot be determined

Comparing to the apex, the base of the lung

• has a smaller alveolar volume and a less negative P_TM

• has a smaller alveolar volume and a more negative P_TM

• has a larger alveolar volume and a less negative P_TM

• has a larger alveolar volume and a more negative P_TM

• has no difference in either alveolar volume or P_TM

[Modified from FA] A spirometer cannot be used to measure

• Total Lung Capacity

• Vital Capacity

• Tidal Volume

• Functional Residual Capacity

• Residual Volume

The initial volume of the spirometer, filled with 10% Helium is 2L. After a forceful expiration, the subject's airway is connected to the spirometer tube. The valve is turned open and the Helium concentration drops to 5%. Which of the following statements would be the most accurate?

• The FRC of the subject is 1L.

• The FRC of the subject is 2L.

• The RV of the subject is 1L.

• The RV of the subject is 2L.

• The VC of the subject is 2L.

Calculate the alveolar ventilation of a subject with the following data given.

Vital Capacity = 5.4L

Residual Volume = 0.6L

Functional Residual Capacity = 2.5L

Inspiratory Reserve Volume = 3.1L

Expiratory Reserve Volume = 1.9L

Anatomic Dead Space = 150mL

Respiration Rate = 12/min

• 3.0L/min

• 4.2L/min

• 5.4L/min

• 64.8L/min

• 67.5L/min

[Modified from FA] Which of the following methods of breathing would give the lowest alveolar ventilation?

• deep and rapid

• shallow and slow

• deep and slow

• just like normal breathing

• shallow and rapid

1. Fill in the blank.

2. Fill in the blank.