Chapter 32

Question 1

Why is it important to know your patients tidal volume?

Answer 1

It determines the amount of flow necessary to maintain patient comfort during respiration

Question 2

Nitrous oxide is pressurized at

Answer 2

750 psi

Question 3

A nitrous oxide cylinder will be cool to the touch. The amount of gas in the cylinder can be monitored by checking the dial indicator.

Answer 3

The first statement is correct, the second statement is incorrect

Question 4

Select the phrases that describe appropriate N20/02 sedation

Answer 4

• The patient’s heart rate slows
• Blood pressure decreases
• Patient has control of cough/gag

Question 5

After a patient uses nitrous oxide/oxygen sedation, it is advised to administer 100% oxygen post operatively. For how many minutes should oxygen be administered?

Answer 5

5 minutes

Question 6

Nitrous oxide is metabolized in the liver; therefore, patients with hepatitis should not receive nitrous oxide/oxygen sedation

Answer 6

Both the statement and the reason are incorrect

Question 7

Which term describes administering a drug in incremental doses over a period of time until a desired endpoint is reached?

Answer 7

Titration

Question 8

Some machines have floating balls within tubes to show when gas is flowing. How is the actual percentage of nitrous oxide calculated?

Answer 8

By dividing the N2O L/ min by the total liters per minute

Question 9

During administration of nitrous oxide/oxygen sedation, the reservoir bag should be kept one- third full. If the bag overinflates, there is an excessive and unnecessary amount of gas flow

Answer 9

The first statement is false, the second statement is true

Question 10

The purpose of the flowmeter is to

Answer 10

Mix and adjust nitrous oxide and oxygen

Question 11

What is the lung capacity of an average adult?

Answer 11

500 mL

Question 12

Which component decreases the pressure of the gas from the tank?

Answer 12

Regulator

Question 13

The majority of contraindications for use of nitrous oxide/oxygen sedation are relatively uncommon. However, there are situations in which the procedure should be postponed or medical consultation is recommended

Answer 13

Both statements are correct

Question 14

What is the minute volume for the average adult?

Answer 14

6 to 7 L/min

Question 15

All of the following are reasons for oversedation except for one. Which one is the exception?

Answer 15

The operator administers the drug in increments

Question 16

Which of these patients is a candidate for nitrous oxide/oxygen sedation

Answer 16

Patient diagnosed with hypertension

Question 17

Nitrous oxide is stored as a liquid in blue cylinders. Nitrous oxide is lighter than air.

Answer 17

The first statement is correct, the second statement is incorrect

Question 18

Oxygen is pressurized at

Answer 18

2000 psi

Question 19

The person responsible for assessing the adequacy of patient recovery following N2O/O2 sedation is the

Answer 19

Person administering the drug

Question 20

N2O/O2 has significant negative affects on the —— system

Answer 20

None of these are correct

Question 21

The reduction of pressure from the cylinder to an appropriate level for patient inhalation is accomplished by the

Answer 21

Regulator

Question 22

The dentist who has posthumously been recognized as the father of anesthesia due to his clinical use of nitrous oxide is

Answer 22

Horace Wells

Question 23

All of the following are relative contraindications of N2O/O2 except which one?

Answer 23

Hypersensitive gag reflex

Question 24

Nitrous oxide administration is contraindicated for people with compromised liver function, hepatitis, or any other condition affecting the liver because the drug is not metabolized in the liver, but it quickly the fuses out of the body through the lungs

Answer 24

First statement is false, second statement is true

Question 25

What feature prevents the inadvertent flow of 100% nitrous oxide if the oxygen source is depleted?

Answer 25

Oxygen fail safe system