Deck 32: Nitrous Oxideoxygen Sedation

Question 1

In which patient should nitrous oxide/oxygen sedation be used?

A) A patient with hypersensitive gag reflex
B) A severely claustrophobic patient
C) A patient with an upper respiratory infection
D) A patient in the first trimester of pregnancy
E) A patient who exhibits signs of alcohol intoxication or drug use

Answer 1

A patient with hypersensitive gag reflex

Question 2

Nitrous oxide pressure in the tank will not show a decrease on the gauge until the _phase is nearly gone and primarily ___remains in the tank.

A) Liquid; vapor
B) Gas; liquid
C) Liquid; water
D) Gas; vapor

Answer 2

Liquid; vapor

Question 3

The reservoir bag is used to confirm the appropriate amount of gas flow to the patient.If the bag collapses there is an insufficient amount of gas to the patient.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Answer 3

Both statements are true.

Question 4

A patient's record indicates that 38% nitrous oxide was used to appropriately sedate the patient at the last visit.How will this information be used during the current appointment?

A) The same percentage is necessary for the current appointment.
B) The patient will need 10% to 20% more at this appointment.
C) The patient will need 10% to 20% less at this appointment.
D) This information will not be used to determine the amount needed at this appointment.

Question 5

Each of the following is a sign of an appropriate level of sedation using nitrous oxide and oxygen EXCEPT one.Which one is the EXCEPTION?

A) Patient is comfortably warm
B) Patient's eyes are glazed
C) Patient needs a mouth prop
D) Patient indicates tingling in fingers

Question 6

Each of the following are contraindications for the use of nitrous oxide/oxygen sedation EXCEPT one.Which one is the EXCEPTION?

A) Pregnancy
B) Elderly
C) Chronic obstructive pulmonary disease
D) Chemical dependency

Question 7

The correct flow rate of nitrous oxide and oxygen is determined by

A) The patient's age
B) The patient's weight
C) Obtaining the patient's minute volume
D) Dividing the patient's lung capacity by his or her respirations per minute

Question 8

Which of the following is NOT a side effect of nitrous oxide/oxygen sedation?

A) Light-headedness
B) Nausea
C) Lethargy
D) Allergic reaction
E) Headache

Question 9

A patient suddenly feels uncomfortable during nitrous oxide/oxygen sedation.The hygienist should

A) Tell the patient to relax and take big,slow breaths.
B) Decrease the percentage of nitrous oxide being delivered to the patient.
C) Take the patient's blood pressure.
D) Activate the emergency medical system.
Chapter 32.Nitrous Oxide/Oxygen Sedation

Question 10

A dental hygienist is establishing a patient's tidal volume and the reservoir bag collapses.What is the most appropriate action when the bag collapses?

A) Increase the amount of flow to the patient.
B) Decrease the amount of flow to the patient.
C) Wait for the patient to regulate his or her breathing pattern.

Question 11

To prevent lethargy,nausea,and headache following nitrous oxide/oxygen sedation,the patient should receive 100% oxygen for a minimum of

A) 5 minutes
B) 10 minutes
C) 15 minutes
D) 20 minutes

Question 12

Nitrous oxide/oxygen sedation is primarily used to reduce pain and alleviate anxiety.Its use is only indicated for adult patients.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 13

What is the method of gradually increasing the dose of a drug over a period of time until the desired endpoint is achieved?

A) Incremental dosing
B) Maximum permissible dose
C) Titration
D) Safely tolerated dose

Question 14

Informed consent should be obtained prior to initiating each sedative procedure using nitrous oxide or any other drug.Informed consent must be obtained from the parent or legal guardian for any child younger than the age of 18,unless there are special legal circumstances.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.

Question 15

When administering nitrous oxide/oxygen sedation for an adult the flow rate should be approximately

A) 1 to 2 liters/minute
B) 3 to 4 liters/minute
C) 4 to 5 liters/minute
D) 6 to 7 liters/minute

Question 16

Use of nitrous oxide/oxygen sedation should be avoided in advanced stages of Alzheimer disease because the patient's ability to communicate or comprehend the intention of the procedure may be compromised.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but NOT related.
C) The statement is correct,but the reason is NOT.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 17

Nitrous oxide/oxygen administration should begin with what percent of nitrous oxide being administered?

A) 10% to 20%
B) 20% to 30%
C) 30% to 40%
D) 40% to 50%

Question 18

During nitrous oxide/oxygen sedation the reservoir bag attached to the flow meter should remain

A) Completely full
B) Two-thirds full
C) One-third full
D) Completely empty