Author Question: What is the minimum transpulmonary pressure that has been associated with lung injury in ani-mals? ... (Read 81 times)

azncindy619 · **on:** Jul 16, 2018

What is the minimum transpulmonary pressure that has been associated with lung injury in ani-mals?

a. 30 cm H2O
b. 40 cm H2O
c. 50 cm H2O
d. 60 cm H2O

Question 2

Lung injury is more likely to occur with which of the following with normal lung tissue?

a. PA = 25 cm H2O; Ppl = 18 cm H2O
b. PA = 29 cm H2O; Ppl = 10 cm H2O
c. PA = 30 cm H2O; Ppl = 21 cm H2O
d. PA = 45 cm H2O; Ppl = 34 cm H2O

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

Answer to Question 1

ANS: A
Studies show that pressures as low as 30-35 cm H2O cause lung injury in animals.

Answer to Question 2

ANS: B
Situations in which the lung-distending pressure (i.e., transpulmonary pressure, or PA Ppl) is abnormally high can cause lung injury. PA can be high by itself without causing lung damage, but if PA Ppl is high, lung damage is more likely. The highest transpulmonary pressure is 19 cm H2O, when the PA = 29 cm H2O and the Ppl = 10 cm H2O.