CDCA Review Local Anesthesia 2025
Questions and Answers (Rated A+)
✅
What local anesthetic is metabolized by pseudocholinesterase? - correct answer
Esters
Where are ester local anesthetics hydrolyzed? - correct answer
plasma by the enzyme pseudocholinesterase
✅ In the blood
Which antiseptic should not be used? - correct answer ✅ Liquid Alcohol
Before using a cartridge you should:
1) wipe it with disinfectant
2) soak it in alcohol
3) autoclave it and or sterilize it? - correct answer ✅None of the above
✅
What part of the syringe indicates that it is an aspirating syringe? - correct answer
Harpoon
✅
What is a possible cause of pain on removal of the needle? - correct answer
Needle barb from impaling bone
If there is no organic basis for pain - correct answer ✅ Psychogenic pain
How does a self aspirating syringe work - correct answer ✅ When you let off
pressure from injecting it self-aspirates (negative pressure built into the syringe)
,CDCA Review Local Anesthesia 2025
Questions and Answers (Rated A+)
When do you aspirate? - correct answer
anesthetic
✅ Immediately before you inject local
✅
What is the action of vasodepressors in local anesthetic? - correct answer
increases depth and duration of anesthetic, decreases absorption of local
anesthetic and vasopressor
Maximum Doses of Epinephrine - correct answer
mg
✅ Normal healthy patient - .2
Cardiac patient - .04 mg
✅
How much epinephrine is in a cartridge of 1:50,000 epinephrine? - correct answer
.036 mg
answer ✅
How much epinephrine is in a cartridge of 1:100,000 epinephrine? - correct
.018 mg
answer ✅
How much epinephrine is in a cartridge of 1:200,000 epinephrine? - correct
.009 mg
What causes a hematoma? - correct answer ✅ Effusion of blood into
extravascular spaces and can result from nicking a blood vessel, artery or vein.
Common in pterygoid plexus of veins with a PSA injection.
, CDCA Review Local Anesthesia 2025
Questions and Answers (Rated A+)
Treatment of Hematoma - correct answer ✅ Apply pressure for at least 2
minutes, Ice the area immediately, and then use warm moist towels 4-6 hours
after to area, rinse with salt water
In which injection is a hematoma most likely to occur? - correct answer ✅ PSA
What is the volume of local anesthetic in a cartridge? - correct answer
or 1.7 mL
✅
1.8 mL
✅
How do you determine gauge and lumen size of a needle? - correct answer
Smaller the number, larger the lumen
30 = small
27 = intermediate
25 = large
Which needle gauge has the smallest lumen? - correct answer ✅ 30 gauge
What sensation is lost first? - correct answer ✅
Pain
answer ✅
What function does sodium chloride provide in local anesthetic solution? - correct
Makes the solution isotonic with tissue
✅
What antioxidant prevents biodegradation of vasoconstrictors? - correct answer
Sodium (Meta) Bisulfite
Questions and Answers (Rated A+)
✅
What local anesthetic is metabolized by pseudocholinesterase? - correct answer
Esters
Where are ester local anesthetics hydrolyzed? - correct answer
plasma by the enzyme pseudocholinesterase
✅ In the blood
Which antiseptic should not be used? - correct answer ✅ Liquid Alcohol
Before using a cartridge you should:
1) wipe it with disinfectant
2) soak it in alcohol
3) autoclave it and or sterilize it? - correct answer ✅None of the above
✅
What part of the syringe indicates that it is an aspirating syringe? - correct answer
Harpoon
✅
What is a possible cause of pain on removal of the needle? - correct answer
Needle barb from impaling bone
If there is no organic basis for pain - correct answer ✅ Psychogenic pain
How does a self aspirating syringe work - correct answer ✅ When you let off
pressure from injecting it self-aspirates (negative pressure built into the syringe)
,CDCA Review Local Anesthesia 2025
Questions and Answers (Rated A+)
When do you aspirate? - correct answer
anesthetic
✅ Immediately before you inject local
✅
What is the action of vasodepressors in local anesthetic? - correct answer
increases depth and duration of anesthetic, decreases absorption of local
anesthetic and vasopressor
Maximum Doses of Epinephrine - correct answer
mg
✅ Normal healthy patient - .2
Cardiac patient - .04 mg
✅
How much epinephrine is in a cartridge of 1:50,000 epinephrine? - correct answer
.036 mg
answer ✅
How much epinephrine is in a cartridge of 1:100,000 epinephrine? - correct
.018 mg
answer ✅
How much epinephrine is in a cartridge of 1:200,000 epinephrine? - correct
.009 mg
What causes a hematoma? - correct answer ✅ Effusion of blood into
extravascular spaces and can result from nicking a blood vessel, artery or vein.
Common in pterygoid plexus of veins with a PSA injection.
, CDCA Review Local Anesthesia 2025
Questions and Answers (Rated A+)
Treatment of Hematoma - correct answer ✅ Apply pressure for at least 2
minutes, Ice the area immediately, and then use warm moist towels 4-6 hours
after to area, rinse with salt water
In which injection is a hematoma most likely to occur? - correct answer ✅ PSA
What is the volume of local anesthetic in a cartridge? - correct answer
or 1.7 mL
✅
1.8 mL
✅
How do you determine gauge and lumen size of a needle? - correct answer
Smaller the number, larger the lumen
30 = small
27 = intermediate
25 = large
Which needle gauge has the smallest lumen? - correct answer ✅ 30 gauge
What sensation is lost first? - correct answer ✅
Pain
answer ✅
What function does sodium chloride provide in local anesthetic solution? - correct
Makes the solution isotonic with tissue
✅
What antioxidant prevents biodegradation of vasoconstrictors? - correct answer
Sodium (Meta) Bisulfite
