What is the minimum transpulmonary pressure that has been ...

[azncindy619]

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]

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.

[azncindy619]

TYSM

[momolu]

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