Chapter 9; Ventilator Graphics

Chapter 9; Ventilator Graphics

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. Identify the sinusoidal (or sine) waveform in the figure below.

ANS:   C

The sinusoidal waveform looks very much like the first half of a mathematical sine wave.

DIF:    1                      REF:    pg. 149

2. The two waveforms that are common for pressure scalars are which of the following?

ANS:   B

Pressure waveforms are usually the rectangular or rising exponential type.

DIF:    1                      REF:    pg. 149

3. The most important factor to affect the degree of resistance in the airways is which of the following?

ANS:   D

The most important factor affecting the degree of airway resistance is the diameter of the airways. The mathematical law that determines this fact is Poiseuille’s Law. A large diameter airway will have low airway resistance and there will be a greater flow of gas. A small diameter airway will have high resistance and there will be a lower flow.

DIF:    1                      REF:    pg. 149

4. The peak inspiratory flow rate on the flow-time scalar below is which of the following?

ANS:   C

If you draw a line across the top of the square wave of the inspiratory flow scalar, the flow rate equals 46 L/min.

DIF:    2                      REF:    pg. 151

5. What is the inspiratory time shown in the flow-time scalar below?

ANS:   B

Inspiratory flow delivery stops at 1 second on this flow-time scalar.

DIF:    2                      REF:    pg. 152

6. What is the expiratory time shown in the flow-time scalar below?

ANS:   B

The first breath ends at 1 second and the second breath begins at 2.5 seconds. Therefore, the expiratory time is 2.5 seconds minus 1, or 1.5 seconds.

DIF:    2                      REF:    pg. 152