Author Question: When is ventilator dependence likely to occur? 1. When ventilatory capacity exceeds demand 2. When ... (Read 74 times)

mpobi80 · **on:** Jul 16, 2018

When is ventilator dependence likely to occur? 1. When ventilatory capacity exceeds demand 2. When arterial hypoxemia is present 3. When the patient is malnourished 4. When the cardiovascular system is unstable

a. 2 and 4 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 2, 3, and 4 only

Question 2

What is the most important prerequisite for weaning a patient from ventilatory support?

a. Improvement in the original problem re-quiring mechanical ventilation
b. Assurance that the patient's ventilatory demand exceeds the patient's capacity
c. Objective evidence indicating good res-piratory muscle endurance
d. Ability to maintain adequate oxygenation with an FiO2 less than 0.4

Athena23 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: D
Other factors that may contribute to ventilator dependence include inadequate arterial oxygena-tion, poor tissue oxygen (O2) delivery, myocardial ischemia, arrhythmias, low cardiac output, and cardiovascular instability.

Answer to Question 2

ANS: A
The single most important criterion to consider when evaluating a patient for ventilator discon-tinuation or weaning is whether there has been significant alleviation or reversal of the disease state or condition that necessitated use of the ventilator in the first place.