Which lung volumes or capacities would increase in an obstructive pulmonary disorder? I.V_T II.VC III.FRC IV.RV A) I, III, and IV only B) I, II, III, and IV C) II, III, and IV only D) III and IV only

Question

Quizplus · Accepted Answer

In obstructive pulmonary disorders, there is an increase in residual volume (RV) due to a decrease in the ability to exhale air from the lungs. This also causes an increase in functional residual capacity (FRC) and can lead to air trapping. Inspiratory capacity (IC) and tidal volume (TV) may decrease or remain unchanged. Vital capacity (VC) may also decrease, but this is not always the case. Therefore, lung volumes/capacities that would increase in obstructive pulmonary disorder are RV, FRC, and possibly TLC (total lung capacity). Thus, options I, III, and IV are correct while II is incorrect.

Which Lung Volumes or Capacities Would Increase in an Obstructive