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

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.

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