Your patient has a P(Aa)O2 of 200 mm Hg while breathing 100 O2. ...

[natalie2426]

Your patient has a P(Aa)O2 of 200 mm Hg while breathing 100 O2. What is the estimated percentage shunt?
 
  a. 5
  b. 10
  c. 20
  d. 30

Question 2

Which of the following parameters are used in calculating the Murray lung injury score of a pa-tient with acute lung injury? 1. Results of chest radiograph 2. PEEP setting 3. Lung compliance 4. Cardiac output
 
  a. 1 and 3 only
  b. 1, 2, and 3 only
  c. 3 and 4 only
  d. 2, 3, and 4 only

[14vl19]

Answer to Question 1

ANS: B
P(Aa)O2 increases to 100 to 150 mm Hg when the person is breathing 100 O2.

Answer to Question 2

ANS: B
The Murray lung injury score quantifies the injury level using four factors: chest radiographic findings, PaO2/FiO2 ratio, positive end-expiratory pressure (PEEP) setting, and compliance.