DH LOCAL ANESTHESIA BOARD
REVIEW EXAM QUESTIONS AND
ANSWERS
What LA is metabolized by pseudocholinesterase? - Correct Answers -Esters
Where are ester LA's hydrolyzed? - Correct Answers -In the blood plasma by th enzyme
pseudocholinesterase
Which antiseptic should not be used? - Correct Answers -Liquid Alcohol
Before using a cartridge you should:
1) wipe it w/ disinfectant
2) soak it in alcohol
3)autoclave it annd/or sterilize it? - Correct Answers -None of the above
When do you aspirate? - Correct Answers -Immediately before you inject local
anesthetic.
What is the action of vasodepressors in local anesthetic? - Correct Answers -Increases
depth and duration of anesthetic, decreases absorption of local anesthetic and
vasodepressor
Maximum doses of epinephrine - Correct Answers -Normal pt = 0.2mg
Cardiac pt = .04mg
What part of the syringe indicates that it is an aspirating syringe? - Correct Answers -
Harpoon
What is a possible cause of pain on removal of the needle? - Correct Answers -Needle
barb from impaling bone
If there is no organic basis for pain - Correct Answers -Psychogenic pain
How does a self-aspirating syringe work? - Correct Answers -When you let off pressure
from injecting, it self-aspirates (negative pressure built into the syringe)
, How much epinephrine is in a cartridge of 1:50,000 epinephrine? - Correct Answers
-.036mg
How much epinephrine is in a cartridge of 1:100,000 epinephrine? - Correct Answers
-.018mg
How much epinephrine is in a cartridge of 1:200,000 epinephrine? - Correct Answers
-.009mg
Hematoma common in: - Correct Answers -Most common in the pterygoid plexus of
veins with a PSA injection
What causes a hematoma? - Correct Answers -the effusion of blood into extravascular
spaces and can result from nicking a blood vessel, artery or vein.
Treatment of a hematoma? - Correct Answers -Apply pressure for at least 2 minutes
Ice the area immediately 10 min on 10 min off for 48 hrs
After 48 hrs apply warm compress if neccessary
What is the volume of local anesthetic in a cartridge? - Correct Answers -1.8 ml (actual)
1.7 (for LA board purposes)
*For NERB: If plain LA, 1.7ml; if vasoconstrictor = 1.8ml)
How do you determine gauge and lumen size of a needle? - Correct Answers -Smaller
the number, larger the lumen
30 = small
27 = intermediate
25 = large
Which needle gauge has the smallest lumen? - Correct Answers -30 gauge
What sensation is lost first? - Correct Answers -Pain
Isotonic - Correct Answers -electrolyte balance
What function does sodium chloride provide in local anesthetic solution? - Correct
Answers -Makes the solution isotonic with tissue.
What antioxidant prevents biodegradation of vasoconstrictors? - Correct Answers -
Sodium (Meta) Bisulfite
What is the role of sodium bisulfite in LA? - Correct Answers -Antioxidant prevents
oxidation of the vasopressor by oxygen which might be trapped in the cartridge by the
manufacturer or diffuse through the cartridge's latex diaphragm.
REVIEW EXAM QUESTIONS AND
ANSWERS
What LA is metabolized by pseudocholinesterase? - Correct Answers -Esters
Where are ester LA's hydrolyzed? - Correct Answers -In the blood plasma by th enzyme
pseudocholinesterase
Which antiseptic should not be used? - Correct Answers -Liquid Alcohol
Before using a cartridge you should:
1) wipe it w/ disinfectant
2) soak it in alcohol
3)autoclave it annd/or sterilize it? - Correct Answers -None of the above
When do you aspirate? - Correct Answers -Immediately before you inject local
anesthetic.
What is the action of vasodepressors in local anesthetic? - Correct Answers -Increases
depth and duration of anesthetic, decreases absorption of local anesthetic and
vasodepressor
Maximum doses of epinephrine - Correct Answers -Normal pt = 0.2mg
Cardiac pt = .04mg
What part of the syringe indicates that it is an aspirating syringe? - Correct Answers -
Harpoon
What is a possible cause of pain on removal of the needle? - Correct Answers -Needle
barb from impaling bone
If there is no organic basis for pain - Correct Answers -Psychogenic pain
How does a self-aspirating syringe work? - Correct Answers -When you let off pressure
from injecting, it self-aspirates (negative pressure built into the syringe)
, How much epinephrine is in a cartridge of 1:50,000 epinephrine? - Correct Answers
-.036mg
How much epinephrine is in a cartridge of 1:100,000 epinephrine? - Correct Answers
-.018mg
How much epinephrine is in a cartridge of 1:200,000 epinephrine? - Correct Answers
-.009mg
Hematoma common in: - Correct Answers -Most common in the pterygoid plexus of
veins with a PSA injection
What causes a hematoma? - Correct Answers -the effusion of blood into extravascular
spaces and can result from nicking a blood vessel, artery or vein.
Treatment of a hematoma? - Correct Answers -Apply pressure for at least 2 minutes
Ice the area immediately 10 min on 10 min off for 48 hrs
After 48 hrs apply warm compress if neccessary
What is the volume of local anesthetic in a cartridge? - Correct Answers -1.8 ml (actual)
1.7 (for LA board purposes)
*For NERB: If plain LA, 1.7ml; if vasoconstrictor = 1.8ml)
How do you determine gauge and lumen size of a needle? - Correct Answers -Smaller
the number, larger the lumen
30 = small
27 = intermediate
25 = large
Which needle gauge has the smallest lumen? - Correct Answers -30 gauge
What sensation is lost first? - Correct Answers -Pain
Isotonic - Correct Answers -electrolyte balance
What function does sodium chloride provide in local anesthetic solution? - Correct
Answers -Makes the solution isotonic with tissue.
What antioxidant prevents biodegradation of vasoconstrictors? - Correct Answers -
Sodium (Meta) Bisulfite
What is the role of sodium bisulfite in LA? - Correct Answers -Antioxidant prevents
oxidation of the vasopressor by oxygen which might be trapped in the cartridge by the
manufacturer or diffuse through the cartridge's latex diaphragm.
