What mode of pressure-controlled ventilation is designed to ...

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What mode of pressure-controlled ventilation is designed to prevent alveoli with short-time con-stants from collapsing, thereby improving oxygenation?
 
  a. Pressure-controlled inverse ratio ventila-tion
  b. Pressure-controlled intermittent mandato-ry ventilation
  c. Volume-assured pressure-supported venti-lation
  d. Bilevel positive airway pressure

Question 2

Which of the following modes of ventilatory support is used to help decrease airway and alveolar pressures?
 
  a. Pressure-controlled continuous mandatory ventilation
  b. Pressure-controlled intermittent mandato-ry ventilation
  c. Volume-controlled continuous mandatory ventilation
  d. Volume-assured pressure-supported venti-lation

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Answer to Question 1

ANS: A
Because alveoli affected by ALI/ARDS have short-time constants, more time is allotted for in-spiration and less time is allotted for expiration.

Answer to Question 2

ANS: A
Pressure-controlled continuous mandatory ventilation may be used to reduce airway and alveolar pressures in any ventilated patient.