Local Anesthesia exam Questions with verified d d d d d d
answers
Which injection techniques are important in decreasing systemic absorption of local
d d d d d d d d d d d
anesthetics?
a. Injecting rapidly
d d
b. Injecting slowly
d d
c. Depositing the solution intramuscularly
d d d d
d. Frequently aspirating during injection of solution
d d d d d d d
e. B and D -
d d d d d
-Injecting slowly
d d d d d d d d d d d d d d d d
-Frequent aspiration during injection of solutiond d d d d
In a healthy individual, which system is the most sensitive to the actions of the local
d d d d d d d d d d d d d d d d
anesthetic agent? d
a. Central nervous
d d d
b. Cardiovascular
d
c. Respiratory
d
d. Digestive
d
e. Immune -
d d d
Central nervous
d d d d d d d d d d d d d d d d
How many Nodes of Ranvier must be blocked to ensure effective anesthesia?
d d d d d d d d d d d
a. Only 1
d d
b. 2-3d
c. 4-5
d
d. 6-7 -
d d d
2-3
d d d d d d d d d d d d d d d
The pH of local anesthetics is lower when it contains a vasoconstrictor.
d d d d d d d d d d d
If the pH is higher, local anesthetics will work faster.
d d d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
Both statements are true
d d d d d d d d d d d d d d d d d d
After reinjecting a local anesthetic agent, if might be difficult to achieve profound anesthesia.
d d d d d d d d d d d d d
a. True
d
b. False -
d d d
True
d d d d d d d d d d d d d d d
Uncharged local anesthetic molecules enter the lipid-soluble layer of the nerve membrane.
d d d d d d d d d d d
Once inside, these uncharged molecules block sodium channels.
d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
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,d. Both statements are false -
d d d d d d
First statement is true, second statement is false
d d d d d d d d d d d d d d d d d d d d d d
In a nerve, fibers near the surface tend to innervate more distal regions.
d d d d d d d d d d d d
a. True
d
b. False -
d d d
False
d d d d d d d d d d d d d d d
Liver disease is a relative contraindication to which local anesthetic agent?
d d d d d d d d d d
a. Esters
d
b. Amides
d
c. Neither
d
d. Both -
d d d
Amides
d d d d d d d d d d d d d d d
Plain local anesthetics cause central nervous system (CNS) stimulation.
d d d d d d d d
In usual doses used in dentistry, local anesthetics have no significant clinical effect on the
d d d d d d d d d d d d d d d
CNS.
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
Completely blocking nerve conduction is not dependent on volume of solution injected.
d d d d d d d d d d d
Completely blocking nerve conduction is dependent of concentration of the local anesthetic
d d d d d d d d d d d d
deposited.
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
Amides are metabolized in the blood.
d d d d d
Amides are excreted in the kidneys.
d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
Signs and symptoms for overdose of local anesthetics include (remember the video):
d d d d d d d d d d d
a. CNS excitation
d d
b. Sedation
d
c. Tonic-clonic seizures
d d
d. All of the above -
d d d d d d
All of the above
d d d d d d d d d d d d d d d d d d
Plain local anesthetics at toxic levels may produce cardiovascular symptoms which appear as:
d d d d d d d d d d d d
a. Decrease in blood pressure
d d d d
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, b. Increase in blood pressure
d d d d
c. Cardiac dysrhythmias
d d
d. Increased contraction force -
d d d d d
Decrease in blood pressure
d d d d d d d d d d d d d d d d d d
What is the maximum number of cartridges of epinephrine 1:100,000 you could give a
d d d d d d d d d d d d d d
patient who has clinically significant cardiovascular disease?
d d d d d d
a. 1 d
b. 2 d
c. 3 d
d. 4 d
e. 5 -
d d d
2 cartridges
d d d d d d d d d d d d d d d d
The onset of nerve block is quick. Recovery from nerve block is slower.
d d d d d d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
Both statements are true
d d d d d d d d d d d d d d d d d d
Factors to consider when selecting use of a vasoconstrictor include all except:
d d d d d d d d d d d
a. Length of procedure
d d d
b. Medical status of patient
d d d d
c. Gender patient
d d
d. Requirement for postoperative pain control -
d d d d d d d
Gender of patient
d d d d d d d d d d d d d d d d d
Using a vasoconstrictor:d d
a. Provides more profound anesthesia
d d d d
b. Increases absorption of local anesthetic and vasoconstrictors in tissues outside the nerve
d d d d d d d d d d d d
c. Decrease the duration of anesthesia
d d d d d d
d. Increases local anesthetic in blood vessels -
d d d d d d d d
Provides more profound anesthesia
d d d d d d d d d d d d d d d d d d
The Node of Ranvier is not exposed to extracellular fluids.
d d d d d d d d d
A myelinated nerve will transmit a nerve impulse faster than an unmyelinated nerve.
d d d d d d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
According to the Specific Receptor Theory, local anesthetics bind to:
d d d d d d d d d
a. Sodium channels
d d
b. Nerve synapses
d d
c. Potassium ions
d d
d. Sodium pumps
d d d
e. Lipid portion of cell membrane -
d d d d d d d
Sodium channels
d d d d d d d d d d d d d d d d
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answers
Which injection techniques are important in decreasing systemic absorption of local
d d d d d d d d d d d
anesthetics?
a. Injecting rapidly
d d
b. Injecting slowly
d d
c. Depositing the solution intramuscularly
d d d d
d. Frequently aspirating during injection of solution
d d d d d d d
e. B and D -
d d d d d
-Injecting slowly
d d d d d d d d d d d d d d d d
-Frequent aspiration during injection of solutiond d d d d
In a healthy individual, which system is the most sensitive to the actions of the local
d d d d d d d d d d d d d d d d
anesthetic agent? d
a. Central nervous
d d d
b. Cardiovascular
d
c. Respiratory
d
d. Digestive
d
e. Immune -
d d d
Central nervous
d d d d d d d d d d d d d d d d
How many Nodes of Ranvier must be blocked to ensure effective anesthesia?
d d d d d d d d d d d
a. Only 1
d d
b. 2-3d
c. 4-5
d
d. 6-7 -
d d d
2-3
d d d d d d d d d d d d d d d
The pH of local anesthetics is lower when it contains a vasoconstrictor.
d d d d d d d d d d d
If the pH is higher, local anesthetics will work faster.
d d d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
Both statements are true
d d d d d d d d d d d d d d d d d d
After reinjecting a local anesthetic agent, if might be difficult to achieve profound anesthesia.
d d d d d d d d d d d d d
a. True
d
b. False -
d d d
True
d d d d d d d d d d d d d d d
Uncharged local anesthetic molecules enter the lipid-soluble layer of the nerve membrane.
d d d d d d d d d d d
Once inside, these uncharged molecules block sodium channels.
d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
1|Page
,d. Both statements are false -
d d d d d d
First statement is true, second statement is false
d d d d d d d d d d d d d d d d d d d d d d
In a nerve, fibers near the surface tend to innervate more distal regions.
d d d d d d d d d d d d
a. True
d
b. False -
d d d
False
d d d d d d d d d d d d d d d
Liver disease is a relative contraindication to which local anesthetic agent?
d d d d d d d d d d
a. Esters
d
b. Amides
d
c. Neither
d
d. Both -
d d d
Amides
d d d d d d d d d d d d d d d
Plain local anesthetics cause central nervous system (CNS) stimulation.
d d d d d d d d
In usual doses used in dentistry, local anesthetics have no significant clinical effect on the
d d d d d d d d d d d d d d d
CNS.
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
Completely blocking nerve conduction is not dependent on volume of solution injected.
d d d d d d d d d d d
Completely blocking nerve conduction is dependent of concentration of the local anesthetic
d d d d d d d d d d d d
deposited.
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
Amides are metabolized in the blood.
d d d d d
Amides are excreted in the kidneys.
d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
Signs and symptoms for overdose of local anesthetics include (remember the video):
d d d d d d d d d d d
a. CNS excitation
d d
b. Sedation
d
c. Tonic-clonic seizures
d d
d. All of the above -
d d d d d d
All of the above
d d d d d d d d d d d d d d d d d d
Plain local anesthetics at toxic levels may produce cardiovascular symptoms which appear as:
d d d d d d d d d d d d
a. Decrease in blood pressure
d d d d
2|Page
, b. Increase in blood pressure
d d d d
c. Cardiac dysrhythmias
d d
d. Increased contraction force -
d d d d d
Decrease in blood pressure
d d d d d d d d d d d d d d d d d d
What is the maximum number of cartridges of epinephrine 1:100,000 you could give a
d d d d d d d d d d d d d d
patient who has clinically significant cardiovascular disease?
d d d d d d
a. 1 d
b. 2 d
c. 3 d
d. 4 d
e. 5 -
d d d
2 cartridges
d d d d d d d d d d d d d d d d
The onset of nerve block is quick. Recovery from nerve block is slower.
d d d d d d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
Both statements are true
d d d d d d d d d d d d d d d d d d
Factors to consider when selecting use of a vasoconstrictor include all except:
d d d d d d d d d d d
a. Length of procedure
d d d
b. Medical status of patient
d d d d
c. Gender patient
d d
d. Requirement for postoperative pain control -
d d d d d d d
Gender of patient
d d d d d d d d d d d d d d d d d
Using a vasoconstrictor:d d
a. Provides more profound anesthesia
d d d d
b. Increases absorption of local anesthetic and vasoconstrictors in tissues outside the nerve
d d d d d d d d d d d d
c. Decrease the duration of anesthesia
d d d d d d
d. Increases local anesthetic in blood vessels -
d d d d d d d d
Provides more profound anesthesia
d d d d d d d d d d d d d d d d d d
The Node of Ranvier is not exposed to extracellular fluids.
d d d d d d d d d
A myelinated nerve will transmit a nerve impulse faster than an unmyelinated nerve.
d d d d d d d d d d d d
a. Both statements are true
d d d d
b. First statement is true, second statement is false
d d d d d d d d
c. First statement is false, second statement is true
d d d d d d d d
d. Both statements are false -
d d d d d d
First statement is false, second statement is true
d d d d d d d d d d d d d d d d d d d d d d
According to the Specific Receptor Theory, local anesthetics bind to:
d d d d d d d d d
a. Sodium channels
d d
b. Nerve synapses
d d
c. Potassium ions
d d
d. Sodium pumps
d d d
e. Lipid portion of cell membrane -
d d d d d d d
Sodium channels
d d d d d d d d d d d d d d d d
3|Page
