Author Question: What is the primary pathophysiologic mechanism in alveolar hypoventilation? a. Decreased minute ... (Read 18 times)

littleanan · **on:** Jul 16, 2018

What is the primary pathophysiologic mechanism in alveolar hypoventilation?

a. Decreased minute ventilation
b. Increased ventilation/perfusion ratio
c. Decreased venous admixture
d. Decreased inspired oxygen pressure

Question 2

According to the Berlin definition of ARDS, what does a PaO2/FIO2 ratio of 150 mm Hg indicate for a patient on mechanical ventilation with a PEEP of 10 cm H2O?

a. Normal lungs
b. Mild ARDS
c. Moderate ARDS
d. Severe ARDS

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

Answer to Question 1

A
Alveolar hypoventilation would result from a decreased minute ventilation. Among the many possible causes are oversedation, head trauma, drug overdose of respiratory depressants, and myasthenia gravis.

Answer to Question 2

C
Moderate ARDS is present when the PaO2/FIO2 ratio falls between 100 and 199 mm Hg.