CDCA exam study guide questions &
answers 2025/2026
Esters - ANSWERSWhat local anesthetic is metabolized by pseudocholinesterase?
In the blood plasma by the enzyme pseudocholinesterase - ANSWERSWhere are ester local
anesthetics hydrolyzed?
Liquid alcohol - ANSWERSWhich antiseptic should not be used?
None of the above - ANSWERSBefore using a cartridge you should:
1) wipe it with disinfectant
2) soak it in alcohol
3) autoclave it and or sterilize it?
Harpoon - ANSWERSWhat part of the syringe indicates that it is an aspirating syringe?
Needle barb from impaling bone - ANSWERSWhat is a possible cause of pain on removal of the
needle?
Psychogenic pain - ANSWERSIf there is no organic basis for pain
When you let off pressure from injecting it self-aspirates (negative pressure built into the
syringe) - ANSWERSHow does a self aspirating syringe work
Immediately before you inject local anesthetic - ANSWERSWhen do you aspirate?
, increases depth and duration of anesthetic, decreases absorption of local anesthetic and
vasopressor - ANSWERSWhat is the action of vasodepressors in local anesthetic?
Normal, healthy patient is 0.2 mg
Cardiac patient is 0.04 mg - ANSWERSMaximum Doses of Epinephrine
.036 mg - ANSWERSHow much epinephrine is in a cartridge of 1:50,000 epinephrine?
0.018 mg - ANSWERSHow much epinephrine is in a cartridge of 1:100,000 epinephrine?
0.009 mg - ANSWERSHow much epinephrine is in a cartridge of 1:200,000 epinephrine?
Common in pterygoid plexus of veins with a PSA injection - ANSWERSWhat causes a hematoma?
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
(most likely with PSA- pterygoid plexus of veins) - ANSWERSTreatment of Hematoma (the
effusion of blood into extravascular spaces and can result from nicking a blood vessel, artery or
vein)
1.8 ml or 1.7 ml - ANSWERSWhat is the volume of local anesthetic in a cartridge?
Smaller the number, larger the lumen
30 = small
27 = intermediate
25 = large - ANSWERSHow do you determine gauge and lumen size of a needle?
answers 2025/2026
Esters - ANSWERSWhat local anesthetic is metabolized by pseudocholinesterase?
In the blood plasma by the enzyme pseudocholinesterase - ANSWERSWhere are ester local
anesthetics hydrolyzed?
Liquid alcohol - ANSWERSWhich antiseptic should not be used?
None of the above - ANSWERSBefore using a cartridge you should:
1) wipe it with disinfectant
2) soak it in alcohol
3) autoclave it and or sterilize it?
Harpoon - ANSWERSWhat part of the syringe indicates that it is an aspirating syringe?
Needle barb from impaling bone - ANSWERSWhat is a possible cause of pain on removal of the
needle?
Psychogenic pain - ANSWERSIf there is no organic basis for pain
When you let off pressure from injecting it self-aspirates (negative pressure built into the
syringe) - ANSWERSHow does a self aspirating syringe work
Immediately before you inject local anesthetic - ANSWERSWhen do you aspirate?
, increases depth and duration of anesthetic, decreases absorption of local anesthetic and
vasopressor - ANSWERSWhat is the action of vasodepressors in local anesthetic?
Normal, healthy patient is 0.2 mg
Cardiac patient is 0.04 mg - ANSWERSMaximum Doses of Epinephrine
.036 mg - ANSWERSHow much epinephrine is in a cartridge of 1:50,000 epinephrine?
0.018 mg - ANSWERSHow much epinephrine is in a cartridge of 1:100,000 epinephrine?
0.009 mg - ANSWERSHow much epinephrine is in a cartridge of 1:200,000 epinephrine?
Common in pterygoid plexus of veins with a PSA injection - ANSWERSWhat causes a hematoma?
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
(most likely with PSA- pterygoid plexus of veins) - ANSWERSTreatment of Hematoma (the
effusion of blood into extravascular spaces and can result from nicking a blood vessel, artery or
vein)
1.8 ml or 1.7 ml - ANSWERSWhat is the volume of local anesthetic in a cartridge?
Smaller the number, larger the lumen
30 = small
27 = intermediate
25 = large - ANSWERSHow do you determine gauge and lumen size of a needle?
