Which of the following statements is TRUE about inspiratory capacity (IC)?
I. It is reduced in restrictive lung diseases.
II. It may be reduced in obstructive lung diseases.
III. It may help determine the type of lung expansion therapy to apply.

Question

Which of the following statements is TRUE about inspiratory capacity (IC)?
I.	It is reduced in restrictive lung diseases.
II.	It may be reduced in obstructive lung diseases.
III.	It may help determine the type of lung expansion therapy to apply.

Quizplus · Accepted Answer

Inspiratory capacity (IC) is a measure of how much air a person can breathe in after a normal exhale. It is reduced in restrictive lung diseases like pulmonary fibrosis and sarcoidosis due to reduced lung compliance. It may also be reduced in obstructive lung diseases like chronic obstructive pulmonary disease (COPD) due to bronchial narrowing and air trapping. IC may help determine the type of lung expansion therapy to apply, such as inspiratory muscle training, incentive spirometry, and positive airway pressure. Therefore, all the given statements about IC are true.

Which of the Following Statements Is TRUE About Inspiratory Capacity