Question 1

Nitrous oxide has been shown to reduce the activity of methionine synthetase,the enzyme involved with the function of which vitamin?

Accepted Answer

A) Vitamin B₁ 
B) Vitamin K 
C) Vitamin B₆ 
D) Folic acid 
E) Vitamin B₁₂ 
A) Vitamin B₁ 
B) Vitamin K 
C) Vitamin B₆ 
D) Folic acid 
E) Vitamin B₁₂

Question 2

Which of the following general anesthetic agents was introduced in the middle 1800s and led to a dramatic reduction in surgically related mortality?

Accepted Answer

A) Propofol 
B) Isoflurane 
C) Ether 
D) Nitrous oxide 
A) Propofol 
B) Isoflurane 
C) Ether 
D) Nitrous oxide

Question 3

Which of the following is the major disadvantage of the use of opioids as an adjunctive drug to general anesthesia in preanesthetic medication?

Accepted Answer

A) Hypertensive crisis 
B) Respiratory depression 
C) Hallucinations 
D) Salivary stimulation 
A) Hypertensive crisis 
B) Respiratory depression 
C) Hallucinations 
D) Salivary stimulation

Question 4

Which of the following statements are true about volatile general anesthetics? (Select all that apply. )

Accepted Answer

A) They are liquids that evaporate easily at room temperature. 
B) They are classified as halogenated hydrocarbons and ethers. 
C) They are known to have good solubility in body tissues. 
D) They are administered intravenously (IV). 
A) They are liquids that evaporate easily at room temperature. 
B) They are classified as halogenated hydrocarbons and ethers. 
C) They are known to have good solubility in body tissues. 
D) They are administered intravenously (IV).

Question 5

Which of the following are true of etomidate? (Select all that apply. )

Accepted Answer

A) It is a halogenated hydrocarbon for general anesthesia. 
B) It is used for induction of general anesthesia. 
C) It can cause adrenal suppression. 
D) It produces dissociative anesthesia. 
A) It is a halogenated hydrocarbon for general anesthesia. 
B) It is used for induction of general anesthesia. 
C) It can cause adrenal suppression. 
D) It produces dissociative anesthesia.

Question 6

Diffusion hypoxia may occur if insufficient 100% oxygen is delivered at the termination of a nitrous oxide procedure because

Accepted Answer

A) the lungs are insufficiently inflated. 
B) the loss of carbon dioxide could decrease ventilation. 
C) nitrous oxide is highly soluble in blood. 
D) nitrous oxide has a slow onset and recovery. 
A) the lungs are insufficiently inflated. 
B) the loss of carbon dioxide could decrease ventilation. 
C) nitrous oxide is highly soluble in blood. 
D) nitrous oxide has a slow onset and recovery.

Question 7

Each of the following is true of patient instructions prior to the administration of nitrous oxide except one.Which is the exception?

Accepted Answer

A) The patient should eat a light meal before the appointment. 
B) The patient should avoid eating a large meal within 3 hours of the appointment. 
C) The patient must bring another person to transport them home as the patient should not drive himself or herself home alone following administration of nitrous oxide. 
D) Nitrous oxide is an excellent choice for a needle-phobic patient. 
A) The patient should eat a light meal before the appointment. 
B) The patient should avoid eating a large meal within 3 hours of the appointment. 
C) The patient must bring another person to transport them home as the patient should not drive himself or herself home alone following administration of nitrous oxide. 
D) Nitrous oxide is an excellent choice for a needle-phobic patient.

Question 8

A patient who has been administered nitrous oxide often will think the procedure is shorter than it was due to which quality of nitrous oxide?

Accepted Answer

A) Euphoria 
B) Anesthesia 
C) Analgesia 
D) Amnesia 
A) Euphoria 
B) Anesthesia 
C) Analgesia 
D) Amnesia

Question 9

A patient should be given 100% oxygen for 5 minutes after treatment with nitrous oxide to prevent

Accepted Answer

A) neuropathy. 
B) dissociative anesthesia. 
C) diffusion hypoxia. 
D) respiratory paralysis. 
A) neuropathy. 
B) dissociative anesthesia. 
C) diffusion hypoxia. 
D) respiratory paralysis.

Question 10

Nitrous oxide has amnestic qualities.

Accepted Answer

A) True 
 B)False

Question 11

The more soluble the anesthetic is in body tissues,the more rapid the onset and recovery will be.

Accepted Answer

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. 
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 12

Nitrous oxide is contraindicated for use in a patient with which of the following conditions?

Accepted Answer

A) Diabetes 
B) Emphysema 
C) Hypertension 
D) Glaucoma 
E) None of the above 
A) Diabetes 
B) Emphysema 
C) Hypertension 
D) Glaucoma 
E) None of the above

Question 13

The loss of respiratory control (i.e. ,diminished carbon dioxide response,paralysis of intercostal muscles)first occurs during which of Guedel's stages of anesthesia?

Accepted Answer

A) Stage I 
B) Stage II 
C) Stage III 
D) Stage IV 
A) Stage I 
B) Stage II 
C) Stage III 
D) Stage IV

Question 14

The best indicator of the degree of sedation under nitrous oxide is

Accepted Answer

A) response to a painful stimulus. 
B) percent nitrous oxide being delivered. 
C) response to questions. 
D) muscle tone. 
E) eye movements. 
A) response to a painful stimulus. 
B) percent nitrous oxide being delivered. 
C) response to questions. 
D) muscle tone. 
E) eye movements.

Question 15

Patients should be instructed to fast before a dental procedure using nitrous oxide.

Accepted Answer

A) True 
 B)False

Question 16

Nitrous oxide cylinders are _____ and oxygen cylinders are _____: (1)red, (2)green, (3)blue, (4)orange,and (5)tan.

Accepted Answer

A) 1;2 
B) 3;2 
C) 2;4 
D) 3;4 
E) 3;5 
A) 1;2 
B) 3;2 
C) 2;4 
D) 3;4 
E) 3;5

Question 17

Nitrous oxide combined with oxygen (N₂O/O₂ )has become a primary part of dental office _____ procedures.

Accepted Answer

A) anxiety reduction 
B) general anesthesia 
C) sleep apnea 
D) bruxism 
A) anxiety reduction 
B) general anesthesia 
C) sleep apnea 
D) bruxism

Question 18

Which of the following types of agents is used during balanced general anesthesia to help the patient pass from stage I to stage III and skip over the signs of stage II?

Accepted Answer

A) Ketamine 
B) Propofol 
C) Ultrashort-acting IV barbiturate 
D) Opioids 
A) Ketamine 
B) Propofol 
C) Ultrashort-acting IV barbiturate 
D) Opioids

Question 19

Which of the following effects is not a characteristic of the action of ketamine?

Accepted Answer

A) Produces "dissociative" anesthesia 
B) Causes xerostomia 
C) Increases cardiac output 
D) Causes recovery associated with delirium and hallucinations 
A) Produces "dissociative" anesthesia 
B) Causes xerostomia 
C) Increases cardiac output 
D) Causes recovery associated with delirium and hallucinations

Question 20

Which of the following dental specialists is most likely to use general anesthetic drugs in their offices?

Accepted Answer

A) Prosthodontist 
B) Endodontist 
C) Oral and maxillofacial surgeon 
D) Orthodontist 
E) Pediatric dentist 
A) Prosthodontist 
B) Endodontist 
C) Oral and maxillofacial surgeon 
D) Orthodontist 
E) Pediatric dentist

Exam 10: General Anesthetics

Nitrous oxide has been shown to reduce the activity of methionine synthetase,the enzyme involved with the function of which vitamin?

Which of the following general anesthetic agents was introduced in the middle 1800s and led to a dramatic reduction in surgically related mortality?

Which of the following is the major disadvantage of the use of opioids as an adjunctive drug to general anesthesia in preanesthetic medication?

Which of the following statements are true about volatile general anesthetics? (Select all that apply. )

Which of the following are true of etomidate? (Select all that apply. )

Diffusion hypoxia may occur if insufficient 100% oxygen is delivered at the termination of a nitrous oxide procedure because

Each of the following is true of patient instructions prior to the administration of nitrous oxide except one.Which is the exception?

A patient who has been administered nitrous oxide often will think the procedure is shorter than it was due to which quality of nitrous oxide?

A patient should be given 100% oxygen for 5 minutes after treatment with nitrous oxide to prevent

Nitrous oxide has amnestic qualities.

The more soluble the anesthetic is in body tissues,the more rapid the onset and recovery will be.

Nitrous oxide is contraindicated for use in a patient with which of the following conditions?

The loss of respiratory control (i.e. ,diminished carbon dioxide response,paralysis of intercostal muscles)first occurs during which of Guedel's stages of anesthesia?

The best indicator of the degree of sedation under nitrous oxide is

Patients should be instructed to fast before a dental procedure using nitrous oxide.

Nitrous oxide cylinders are _____ and oxygen cylinders are _____: (1)red, (2)green, (3)blue, (4)orange,and (5)tan.

Nitrous oxide combined with oxygen (N₂O/O₂ )has become a primary part of dental office _____ procedures.

Which of the following types of agents is used during balanced general anesthesia to help the patient pass from stage I to stage III and skip over the signs of stage II?

Which of the following effects is not a characteristic of the action of ketamine?

Which of the following dental specialists is most likely to use general anesthetic drugs in their offices?

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