Author Question: Which of the following modes of lung expansion therapy is physiologically most normal? a. ... (Read 209 times)

kamilo84 · **on:** Jul 16, 2018

Which of the following modes of lung expansion therapy is physiologically most normal?

a. Continuous positive airway pressure
b. Incentive spirometry
c. Positive end expiratory pressure
d. Intermittent positive-pressure breathing therapy

Question 2

How do all modes of lung expansion therapy aid lung expansion?

a. Increasing the transpulmonary pressure gradient
b. Decreasing the transthoracic pressure gra-dient
c. Increasing the pressure in the pleural space
d. Decreasing the pressure in the alveoli

InfiniteSteez · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: B
Although all these approaches are used in lung expansion therapy, it should be clear that those methods that decrease Ppl (e.g., incentive spirometry) have more of a physiologic effect than those that raise Palv and often are most effective.

Answer to Question 2

ANS: A
All modes of lung expansion therapy increase lung volume by increasing the transpulmonary pressure (PL) gradient.