Which lung volumes or capacities would decrease in an obstructive pulmonary disorder?
I. IC
II. VC
III. IRV
IV. ERV
A) I, II, III, and IV only
B) II, III, and IV only
C) I, III, and IV only
D) I and II only

Question

Quizplus · Accepted Answer

In obstructive pulmonary disorders, such as chronic obstructive pulmonary disease (COPD), airflow is hindered due to narrowed airways. This results in difficulty expelling air, leading to increased residual volume and total lung capacity. However, the volumes and capacities directly involved in the intake and initial storage of air, such as Inspiratory Capacity (IC), Vital Capacity (VC), Inspiratory Reserve Volume (IRV), and Expiratory Reserve Volume (ERV), are typically reduced because the patient cannot fully expel air, limiting the amount of fresh air that can be inhaled.

Which Lung Volumes or Capacities Would Decrease in an Obstructive