wreb Local Anesthesia UPDATED ACTUAL
Exam Questions and CORRECT Answers
What nerve was damaged if the anterior 2/3 of the tongue has a loss of sensation - CORRECT
ANSWER - facial or lingual?
What is the volume of LA anesthetic solution in 2 cartridges of Lidocaine? - CORRECT
ANSWER - 3.6ml?
What type of injection would be used to achieve hemostasis - CORRECT ANSWER -
Infiltration
Where are used needles disposed - CORRECT ANSWER - Hazard Sharps
Burning feeling from injection can be caused by what? - CORRECT ANSWER - Lowered
pH, experienced more by an older cartridge than a fresher one because once sodium bisulfite is
oxidized, it turns to sodium bisulfate, it has an even lower pH.
Needle gauge for infiltration - CORRECT ANSWER - 27 Short
Why would you use caution with Amides and a patient who has Cirrosis? - CORRECT
ANSWER - Amides are metabolized in the liver
Which component of LA is an antioxidant - CORRECT ANSWER - Sodium (Meta)
Bisulfite
Sequence of disappearance of sensation - CORRECT ANSWER - Pain, Temperature,
Touch, Proprioception, Motor
Adverse effects on CNS - CORRECT ANSWER - CNS Depression, Convulsions
, 4.5-7micrograms/mL Epinephrine will induce - CORRECT ANSWER - Euphoria,
sweating, vomiting
10 micrograms and up Epinephrine will induce - CORRECT ANSWER - Seizures,
Decreased HR, BP, and respirations
A cartridge of .5% contains how much LA - CORRECT ANSWER - 9.0 mg
A cartridge of 2% contains how much LA - CORRECT ANSWER - 36.mg
A cartridge of 3% contains how much LA? - CORRECT ANSWER - 54.mg
A cartridge of 4% contains how much LA - CORRECT ANSWER - 72.mg
Nerve block - CORRECT ANSWER - Close proximity to nerve trunk
The maxillary division passes through which foramen - CORRECT ANSWER - Foramen
rotundum
The mandibular division passes through which foramen - CORRECT ANSWER -
Foramen ovale
Treatment for Hematoma - CORRECT ANSWER - Hematoma is the effusion of blood
into extravascular spaces and can result from nicking a blood vessel, artery or vein. Apply
pressure for atleast 2 minutes, Ice the area immediately, and then use warm moist towels 4-6
hours after to area, rinse with salt water
Primary reason for needle breakage - CORRECT ANSWER - Weakening of the dental
needle by bending it before it's insertion into the pt.'s mouth. 2nd reason is pt. movement.
Exam Questions and CORRECT Answers
What nerve was damaged if the anterior 2/3 of the tongue has a loss of sensation - CORRECT
ANSWER - facial or lingual?
What is the volume of LA anesthetic solution in 2 cartridges of Lidocaine? - CORRECT
ANSWER - 3.6ml?
What type of injection would be used to achieve hemostasis - CORRECT ANSWER -
Infiltration
Where are used needles disposed - CORRECT ANSWER - Hazard Sharps
Burning feeling from injection can be caused by what? - CORRECT ANSWER - Lowered
pH, experienced more by an older cartridge than a fresher one because once sodium bisulfite is
oxidized, it turns to sodium bisulfate, it has an even lower pH.
Needle gauge for infiltration - CORRECT ANSWER - 27 Short
Why would you use caution with Amides and a patient who has Cirrosis? - CORRECT
ANSWER - Amides are metabolized in the liver
Which component of LA is an antioxidant - CORRECT ANSWER - Sodium (Meta)
Bisulfite
Sequence of disappearance of sensation - CORRECT ANSWER - Pain, Temperature,
Touch, Proprioception, Motor
Adverse effects on CNS - CORRECT ANSWER - CNS Depression, Convulsions
, 4.5-7micrograms/mL Epinephrine will induce - CORRECT ANSWER - Euphoria,
sweating, vomiting
10 micrograms and up Epinephrine will induce - CORRECT ANSWER - Seizures,
Decreased HR, BP, and respirations
A cartridge of .5% contains how much LA - CORRECT ANSWER - 9.0 mg
A cartridge of 2% contains how much LA - CORRECT ANSWER - 36.mg
A cartridge of 3% contains how much LA? - CORRECT ANSWER - 54.mg
A cartridge of 4% contains how much LA - CORRECT ANSWER - 72.mg
Nerve block - CORRECT ANSWER - Close proximity to nerve trunk
The maxillary division passes through which foramen - CORRECT ANSWER - Foramen
rotundum
The mandibular division passes through which foramen - CORRECT ANSWER -
Foramen ovale
Treatment for Hematoma - CORRECT ANSWER - Hematoma is the effusion of blood
into extravascular spaces and can result from nicking a blood vessel, artery or vein. Apply
pressure for atleast 2 minutes, Ice the area immediately, and then use warm moist towels 4-6
hours after to area, rinse with salt water
Primary reason for needle breakage - CORRECT ANSWER - Weakening of the dental
needle by bending it before it's insertion into the pt.'s mouth. 2nd reason is pt. movement.
