LOCAL ANESTHESIA MOCK BOARD
100% ACCURATE
When a nerve is in its resting state, the: - ANSWERK+ is concentrated outside the cell.
Which of the following maintains the resting potential of a nerve fiber? - ANSWERThe
Na+ pump
Select the following anesthetic(s) available in the US that is(are) formulated with
epinephrine 1:200,000
A. Lidocaine
B. Mepivacaine
C. Prilocaine
D. Articaine
E. C and D - ANSWERC and D
Which of the following anesthetics has the shortest duration when administering a local
anesthetic block? - ANSWERMepivacaine 3%
Levonordefrin has how many mg/mL of vasoconstrictor? - ANSWER0.05 mg/mL
How much epinephrine does a 1:200,000 dilution contain compared with a 1:100,000
dilution? - ANSWERHalf
What is the cardiac dose for epinephrine? - ANSWER0.04 mg
How many cartridges could a patient from the answer in question #7 safely receive if
administering a 1:200,000 epinephrine dilution? - ANSWER4.4 cartridges
What is the primary reason that catecholamines are added to local anesthetic solutions?
- ANSWERDecrease the risk of toxicity
Sodium bicarbonate is added to local anesthetic solutions: - ANSWERonly when a
vasoconstrictor is added
How many mg of epinephrine are in one cartridge of a 1:100,000 dilution? -
ANSWER0.018 mg
During the inferior alveolar block the patient feels a sudden electrical shock. This is due
to: - ANSWERthe needle touching the lingual nerve.
Supraperiosteal injections are less successful on the mandible because of the -
ANSWERdensity of the bone of the mandible.
, Which of the following vasoconstrictor dilutions provides the greatest hemostasis? -
ANSWER1:50,000 epinephrine
After the administration of a local anesthetic, what causes a droopy eyelid? -
ANSWERDepositing the solution in the parotid gland.
Which anesthetic is primarily metabolized in the blood? - ANSWERArticaine
What is the recommended needle gauge for an inferior alveolar block? - ANSWER25
gauge
Esters are metabolized by - ANSWERplasma
Amides are metabolized by - ANSWERliver
The coronoid notch is a landmark for which nerve block? - ANSWERInferior alveolar
block
When energy for conduction is derived from the nerve cell membrane itself and is no
longer dependent on the stimulus for continuance, the conduction is considered to be: -
ANSWERself-propagating
Which characteristic enhances the onset and effectiveness of local anesthetics? -
ANSWERhigh lipid solubility
What is tachyphylaxis? - ANSWERIncreased tolerance to a drug that is administered
repeatedly
Signs and symptons of a vasoconstrictor overdose are manifested as: - ANSWERCNS
stimulation
What part of the syringe indicates it is an aspirating syringe? - ANSWERHarpoon
A barbed needle causes pain upon: - ANSWERwithdrawal
The dental hygienist administers 3 cartridges of articaine. How many mg of local
anesthetic were administered? - ANSWER200 mg
If the dental hygienist administered 105 mg of bupivacaine to a 150-pound patient, how
many cartridges were administed? - ANSWER11.6 cartridges
In the above question (If the dental hygienist administered 105 mg of bupivacaine to a
150-pound patient, how many cartridges were administed? 11.6 cartridges) ... what
occurred? - ANSWERThe dental hygienist administered an overdose.
100% ACCURATE
When a nerve is in its resting state, the: - ANSWERK+ is concentrated outside the cell.
Which of the following maintains the resting potential of a nerve fiber? - ANSWERThe
Na+ pump
Select the following anesthetic(s) available in the US that is(are) formulated with
epinephrine 1:200,000
A. Lidocaine
B. Mepivacaine
C. Prilocaine
D. Articaine
E. C and D - ANSWERC and D
Which of the following anesthetics has the shortest duration when administering a local
anesthetic block? - ANSWERMepivacaine 3%
Levonordefrin has how many mg/mL of vasoconstrictor? - ANSWER0.05 mg/mL
How much epinephrine does a 1:200,000 dilution contain compared with a 1:100,000
dilution? - ANSWERHalf
What is the cardiac dose for epinephrine? - ANSWER0.04 mg
How many cartridges could a patient from the answer in question #7 safely receive if
administering a 1:200,000 epinephrine dilution? - ANSWER4.4 cartridges
What is the primary reason that catecholamines are added to local anesthetic solutions?
- ANSWERDecrease the risk of toxicity
Sodium bicarbonate is added to local anesthetic solutions: - ANSWERonly when a
vasoconstrictor is added
How many mg of epinephrine are in one cartridge of a 1:100,000 dilution? -
ANSWER0.018 mg
During the inferior alveolar block the patient feels a sudden electrical shock. This is due
to: - ANSWERthe needle touching the lingual nerve.
Supraperiosteal injections are less successful on the mandible because of the -
ANSWERdensity of the bone of the mandible.
, Which of the following vasoconstrictor dilutions provides the greatest hemostasis? -
ANSWER1:50,000 epinephrine
After the administration of a local anesthetic, what causes a droopy eyelid? -
ANSWERDepositing the solution in the parotid gland.
Which anesthetic is primarily metabolized in the blood? - ANSWERArticaine
What is the recommended needle gauge for an inferior alveolar block? - ANSWER25
gauge
Esters are metabolized by - ANSWERplasma
Amides are metabolized by - ANSWERliver
The coronoid notch is a landmark for which nerve block? - ANSWERInferior alveolar
block
When energy for conduction is derived from the nerve cell membrane itself and is no
longer dependent on the stimulus for continuance, the conduction is considered to be: -
ANSWERself-propagating
Which characteristic enhances the onset and effectiveness of local anesthetics? -
ANSWERhigh lipid solubility
What is tachyphylaxis? - ANSWERIncreased tolerance to a drug that is administered
repeatedly
Signs and symptons of a vasoconstrictor overdose are manifested as: - ANSWERCNS
stimulation
What part of the syringe indicates it is an aspirating syringe? - ANSWERHarpoon
A barbed needle causes pain upon: - ANSWERwithdrawal
The dental hygienist administers 3 cartridges of articaine. How many mg of local
anesthetic were administered? - ANSWER200 mg
If the dental hygienist administered 105 mg of bupivacaine to a 150-pound patient, how
many cartridges were administed? - ANSWER11.6 cartridges
In the above question (If the dental hygienist administered 105 mg of bupivacaine to a
150-pound patient, how many cartridges were administed? 11.6 cartridges) ... what
occurred? - ANSWERThe dental hygienist administered an overdose.
