What is the primary pathophysiologic mechanism in alveolar ...

[littleanan]

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

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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.

[littleanan]

Excellent

[Dominic]

Thanks for the timely response, appreciate it