CDCA exam questions with complete
solutions
.036 mg - ANSWERS-How much epinephrine is in a cartridge of 1:50,000 epinephrine?
0.018 mg - ANSWERS-How much epinephrine is in a cartridge of 1:100,000 epinephrine?
0.009 mg - ANSWERS-How much epinephrine is in a cartridge of 1:200,000 epinephrine?
Common in pterygoid plexus of veins with a PSA injection - ANSWERS-What 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) - ANSWERS-Treatment 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 - ANSWERS-What is the volume of local anesthetic in a cartridge?
Smaller the number, larger the lumen
30 = small
27 = intermediate
25 = large - ANSWERS-How do you determine gauge and lumen size of a needle?
30 gauge - ANSWERS-What needle gauge has the smallest lumen?
, Pain - ANSWERS-What sensation is lost first?
Makes the solution isotonic with tissue - ANSWERS-What function does sodium chloride provide
in local anesthetic solution?
Sodium (meta) bisulfite - ANSWERS-What antioxidant prevents biodegradation of
vasoconstrictors?
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 - ANSWERS-
What is the role of sodium bisulfite in local anesthetic?
Weakening of the dental needle by bending it before insertion into the patient's mouth
2nd most common reason is patient movement during injection - ANSWERS-Primary cause of
needle separation (breakage)?
Esters - ANSWERS-What local anesthetic is metabolized by pseudocholinesterase?
In the blood plasma by the enzyme pseudocholinesterase - ANSWERS-Where are ester local
anesthetics hydrolyzed?
Liquid alcohol - ANSWERS-Which antiseptic should not be used?
None of the above - ANSWERS-Before using a cartridge you should:
1) wipe it with disinfectant
2) soak it in alcohol
3) autoclave it and or sterilize it?
solutions
.036 mg - ANSWERS-How much epinephrine is in a cartridge of 1:50,000 epinephrine?
0.018 mg - ANSWERS-How much epinephrine is in a cartridge of 1:100,000 epinephrine?
0.009 mg - ANSWERS-How much epinephrine is in a cartridge of 1:200,000 epinephrine?
Common in pterygoid plexus of veins with a PSA injection - ANSWERS-What 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) - ANSWERS-Treatment 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 - ANSWERS-What is the volume of local anesthetic in a cartridge?
Smaller the number, larger the lumen
30 = small
27 = intermediate
25 = large - ANSWERS-How do you determine gauge and lumen size of a needle?
30 gauge - ANSWERS-What needle gauge has the smallest lumen?
, Pain - ANSWERS-What sensation is lost first?
Makes the solution isotonic with tissue - ANSWERS-What function does sodium chloride provide
in local anesthetic solution?
Sodium (meta) bisulfite - ANSWERS-What antioxidant prevents biodegradation of
vasoconstrictors?
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 - ANSWERS-
What is the role of sodium bisulfite in local anesthetic?
Weakening of the dental needle by bending it before insertion into the patient's mouth
2nd most common reason is patient movement during injection - ANSWERS-Primary cause of
needle separation (breakage)?
Esters - ANSWERS-What local anesthetic is metabolized by pseudocholinesterase?
In the blood plasma by the enzyme pseudocholinesterase - ANSWERS-Where are ester local
anesthetics hydrolyzed?
Liquid alcohol - ANSWERS-Which antiseptic should not be used?
None of the above - ANSWERS-Before using a cartridge you should:
1) wipe it with disinfectant
2) soak it in alcohol
3) autoclave it and or sterilize it?
