Author Question: Which of the following modes of support provides all of the patient's minute ventilation (VE) as ... (Read 74 times)

ap345 · **on:** Jul 16, 2018

Which of the following modes of support provides all of the patient's minute ventilation (VE) as mandatory volume-controlled (VC) breaths?

a. VC continuous mandatory ventilation
b. VC intermittent mandatory ventilation
c. Pressure-supported ventilation
d. Continuous positive airway pressure

Question 2

Physiological effects of adding a volume-limited inflation hold to mandatory breaths include which of the following?

1. Decreased PaCO2
2. Increased inspiratory time
3. Decreased VD/VT
4. Longer expiratory times
a. 2 and 4 only
b. 1, 2, 3, and 4
c. 3 and 4 only
d. 1, 2, and 3 only

JCABRERA33 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
VC continuous mandatory ventilation provides all of the patient's minute ventilation as manda-tory breaths.

Answer to Question 2

ANS: D
By momentarily maintaining lung volume under conditions of no flow, an inflation hold allows additional time for gas redistribution between lung units with different time constants. In both animal and human studies, increasing the length of an inflation hold decreases the VD/VT, PaCO2, and inert gas washout time. Adding an inflation hold effectively increases total inspiratory time, thereby shortening the time available for exhalation.