Which of the following would decrease PaCO2 when ventilating a ...

[JMatthes]

Which of the following would decrease PaCO2 when ventilating a patient using intermittent mandatory ventilation with pressure support?
 
  a. Increase the level of pressure support.
  b. Decrease the tidal volume.
  c. Decrease the mechanical rate.
  d. Increase the FiO2.

Question 2

A physician orders intubation and mechanical ventilation in volume-controlled ventilation mode for a 170-lb adult man with neuromuscular disease. Which of the following initial settings would you recommend?
 
  Rate VT
  a. 14 breath/min 540 ml
  b. 20 breath/min 310 ml
  c. 10 breath/min 770 ml
  d. 6 breath/min 500 ml

[matt]

Answer to Question 1

ANS: A
The PaCO2 can be decreased by increasing tidal volume, increasing PSV for spontaneous breaths, or increasing the machine rate.

Answer to Question 2

ANS: A