Which of the following major categories of ventilator function are useful in classifying ventila-tors? 1. Control system 2. Power transmission and conversion 3. Output 4. Input
a. 1 and 2 only
b. 3 and 4 only
c. 1, 3, and 4 only
d. 1, 2, 3, and 4
ANS: D
To understand mechanical ventilators, we must first understand their four basic functions:
? Input power
? Power transmission and conversion
? Control system
? Output (pressure, volume, and flow waveforms)
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