CDCA Local Anesthesia exam latest
exam review 2026
✅
Computer controlled local anesthetic delivery system (C-CLAD) - correct answer
Local anesthesia system where the syringe is held like a pen and the drug is
delivered at a pre-programmed flow
Prevents discomfort from rapid delivery rate
T/F Harpoons can become dull after repeated use - correct answer ✅
True, a dull
harpoon increases chance of disengagement when the thumb ring is pulled back
during aspiration
Threaded hub - correct answer
to the syringe
✅ threaded component that attaches the needle
How to care for syringes - correct answer ✅ Autoclave after each use
After 5 autoclave cycles, the syringe should be disassembled and lubricated on all
threated joints
The harpoon should be cleaned with a brush after each use
correct answer ✅
T/F? The greater the angle of the bevel, the greater the degree of deflection -
True
Needle gauge color coordination - correct answer
diameter)
✅ 25 gauge: red (largest
27 gauge: yellow
30 gauge: blue (smallest diameter)
, CDCA Local Anesthesia exam latest
exam review 2026
✅
Advantages of using smaller gauge needles (large diameter) - correct answer
Less deflection of needle as it passes through soft tissue
More resistant to breakage
More accurate aspiration of blood, smaller gauge (larger diameter) needles are
recommended with injections in highly vascular areas (IA, PSA, mental/incisive
nerve block)
Needle lengths - correct answer ✅ Long: 30-35 mm (average: 32 mm)
Short: 20-25 mm (average: 20mm)
Ultra-short: 10-12mm (average: 12mm) only available in 30 gauge (smaller
diameter)
What is the main cause of needlestick injuries? - correct answer
movement
✅ patient
Needle barb - correct answer ✅a fishhook like barb at the tip of a needle can
cause discomfort when the needle is withdrawn
if a barb is present, change the needle
barbs can occur when the needle touches bone
barbs can be detected by lightly dragging the needle across a sterile gauze. If a
barb is present, the gauze will "catch"
T/F? Pressure can shatter a cartridge - correct answer ✅ True
If this occurs, suction the patients mouth thoroughly and report the incident
The thin mylar plastic label on the outside of the cartridge reduces the incidence
of it shattering
exam review 2026
✅
Computer controlled local anesthetic delivery system (C-CLAD) - correct answer
Local anesthesia system where the syringe is held like a pen and the drug is
delivered at a pre-programmed flow
Prevents discomfort from rapid delivery rate
T/F Harpoons can become dull after repeated use - correct answer ✅
True, a dull
harpoon increases chance of disengagement when the thumb ring is pulled back
during aspiration
Threaded hub - correct answer
to the syringe
✅ threaded component that attaches the needle
How to care for syringes - correct answer ✅ Autoclave after each use
After 5 autoclave cycles, the syringe should be disassembled and lubricated on all
threated joints
The harpoon should be cleaned with a brush after each use
correct answer ✅
T/F? The greater the angle of the bevel, the greater the degree of deflection -
True
Needle gauge color coordination - correct answer
diameter)
✅ 25 gauge: red (largest
27 gauge: yellow
30 gauge: blue (smallest diameter)
, CDCA Local Anesthesia exam latest
exam review 2026
✅
Advantages of using smaller gauge needles (large diameter) - correct answer
Less deflection of needle as it passes through soft tissue
More resistant to breakage
More accurate aspiration of blood, smaller gauge (larger diameter) needles are
recommended with injections in highly vascular areas (IA, PSA, mental/incisive
nerve block)
Needle lengths - correct answer ✅ Long: 30-35 mm (average: 32 mm)
Short: 20-25 mm (average: 20mm)
Ultra-short: 10-12mm (average: 12mm) only available in 30 gauge (smaller
diameter)
What is the main cause of needlestick injuries? - correct answer
movement
✅ patient
Needle barb - correct answer ✅a fishhook like barb at the tip of a needle can
cause discomfort when the needle is withdrawn
if a barb is present, change the needle
barbs can occur when the needle touches bone
barbs can be detected by lightly dragging the needle across a sterile gauze. If a
barb is present, the gauze will "catch"
T/F? Pressure can shatter a cartridge - correct answer ✅ True
If this occurs, suction the patients mouth thoroughly and report the incident
The thin mylar plastic label on the outside of the cartridge reduces the incidence
of it shattering
