Chapter 12: Introduction to Ventilators

Chapter 12: Introduction to Ventilators

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. Pneumatic ventilators may incorporate which of the following components for operation?
2. Pistons
3. Air entrainers
4. Flexible diaphragms
5. Internal direct current batteries

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

 

 

ANS:  B

Pneumatic ventilators may incorporate components such as air entrainers, needle valves, flexible diaphragms, and spring-loaded valves to perform certain functions. Electrically powered ventilators most often use electrical power to run internal motors for operating pistons and may have internal direct current batteries, which can provide electrical power during patient transport or in the event of a power failure.

 

PTS:   1                    REF:   Page 365

 

2. An iron lung is which type of ventilator?

a.	Fluidic	c.	Negative-pressure
b.	Positive-pressure	d.	Positive/negative pressure

 

 

ANS:  C

An iron lung and a chest cuirass are both negative-pressure ventilators that are rarely used in the ventilation of patients these days.

 

PTS:   1                    REF:   Page 366

 

3. Which type of ventilator creates a sinusoidal pressure waveform pattern of positive and negative pressures?

a.	Fluidic	c.	Positive-pressure
b.	Pneumatic	d.	Combined-pressure

 

 

ANS:  D

A combined-pressure device, such as a high-frequency oscillator, produces oscillating gas pressure waveforms at the upper airway, producing a waveform that is sinusoidal, with positive-pressure and negative-pressure oscillations produced at the upper airway.

 

PTS:   1                    REF:   Page 366

 

4. An open-loop ventilator system can be described as which of the following?

a.	Feedback	c.	Unintelligent
b.	Hierarchical	d.	Servo-controlled

 

 

ANS:  C

Unintelligent ventilators are called open-loop systems because they do not respond to changes in the delivery of gas to the patient when there are any problems.

 

PTS:   1                    REF:   Page 367

 

5. A closed-loop ventilator system can be described as which of the following?
6. Feedback
7. Hierarchical
8. Unintelligent
9. Servo-controlled

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

 

 

ANS:  C

A closed-loop ventilator system is an intelligent system that can respond to certain inputs based on programming. This type of system is similar to cruise control on a car. When a parameter is set on the ventilator, the ventilator compares the input with the output and makes certain adjustments. These systems are also called feedback or servo-controlled systems.

 

PTS:   1                    REF:   Page 367