2023 CDCA exam Questions and Answers (All Correct)
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Course
CDCA
Institution
CDCA
Esters - ANSWER What local anesthetic is metabolized by pseudocholinesterase?
In the blood plasma by the enzyme pseudocholinesterase - ANSWER Where are ester local anesthetics hydrolyzed?
Liquid alcohol - ANSWER Which antiseptic should not be used?
None of the above - ANSWER Before using a...
2023 CDCA exam Questions and Answers (All Correct)
Esters - ANSWER What local anesthetic is metabolized by pseudocholinesterase?
In the blood plasma by the enzyme pseudocholinesterase - ANSWER Where are ester local anesthetics hydrolyzed?
Liquid alcohol - ANSWER Which antiseptic should not be used?
None of the above - ANSWER Before using a cartridge you should: 1) wipe it with disinfectant 2) soak it in alcohol
3) autoclave it and or sterilize it?
Harpoon - ANSWER What part of the syringe indicates that it is an aspirating syringe?
Needle barb from impaling bone - ANSWER What is a possible cause of pain on removal of the needle?
Psychogenic pain - ANSWER If there is no organic basis for pain
When you let off pressure from injecting it self-aspirates (negative pressure built into the syringe) - ANSWER How does a self aspirating syringe work
Immediately before you inject local anesthetic - ANSWER When do you aspirate?
increases depth and duration of anesthetic, decreases absorption of local anesthetic and vasopressor - ANSWER What is the action of vasodepressors in local anesthetic?
Normal, healthy patient is 0.2 mg
Cardiac patient is 0.04 mg - ANSWER Maximum Doses of Epinephrine
.036 mg - ANSWER How much epinephrine is in a cartridge of 1:50,000 epinephrine?
0.018 mg - ANSWER How much epinephrine is in a cartridge of 1:100,000 epinephrine?
0.009 mg - ANSWER How much epinephrine is in a cartridge of 1:200,000 epinephrine?
Common in pterygoid plexus of veins with a PSA injection - ANSWER 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) - ANSWER 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 - ANSWER What is the volume of local anesthetic in a cartridge?
Smaller the number, larger the lumen
30 = small
27 = intermediate
25 = large - ANSWER How do you determine gauge and lumen size of a needle?
30 gauge - ANSWER What needle gauge has the smallest lumen?
Pain - ANSWER What sensation is lost first?
Makes the solution isotonic with tissue - ANSWER What function does sodium chloride provide in local anesthetic solution?
Sodium (meta) bisulfite - ANSWER 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 - ANSWER 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 - ANSWER Primary cause of needle separation (breakage)?
When the needle contacts the nerve sheath - ANSWER When does a patient receive an electrical shock sensation during and injection?
Less bone density (thinner cortical plate of bone) - ANSWER Why does infiltration work better in the maxilla?
Procaine (novacain) - ANSWER What local anesthetic is not an amide?
15 min - ANSWER How long can you safely leave a Dentipatch (EMLA) on tissue?
3% Mepivacaine Plain - ANSWER Most commonly used plain local anesthetic?
27 or 30 gauge - ANSWER What gauge needle can be used for infiltration injections?
Procaine (novacaine) - ANSWER Which local anesthetic is an ester?
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