Quiz 3

Question 1

1. Which type of syringe do we most commonly use in a clinical lab setting?

a. self-aspirating syringe
b. pressure syringe
c. breech-loading syringe

Answer 1

1. c. breech-loading syringe

Question 2

Which type of needle is best used to reduce the chance of breakage?

a. 27 gauge short
b. 30 gauge short
c. 25 gauge short
d. 30 gauge long

Answer 2

c. 25 gauge short

Question 3

You should never bury the needle to which part?

a. the shank
b. the hub
c. the syringe penetrating end
d. the bevel

Answer 3

b. the hub

Question 4

Which of the following topical anesthetics remains at the site of application the longest?

a. Benzocaine
b. Lidocaine

Answer 4

a. Benzocaine

Question 5

Which part of the syringe engages the rubber stopper of the anesthetic cartridge?

a. the harpoon
b. the piston
c. the needle adaptor
d. the syringe penetrating end

Answer 5

a. the harpoon

Question 6

Benzocaine topical is classified as an ester or amide?
a. Amide
b. Ester

Answer 6

b. Ester

Question 7

DISPUTED QUESTION:
True or False: The potential for toxicity is greater with local anesthetic drugs as opposed to topical anesthetics.
Incorrect answer:
a. True
b. False

Answer 7

“correct” answer: b. False

Bassett specifically states on page 104, “Generally formulated in concentrations exceeding those approved for use in injectable local anesthetic drugs, topical preparations are potentially more toxic.”

Question 8

How do topical anesthetics increase a patient’s chance of experiencing toxicity?
1. topical anesthetics do not contain vasoconstrictors.
2. topical anesthetics are poorly water soluble.
3. topical anesthetics remain at the site of application longer.
4. the concentration of topical anesthetics is high.
5. topical anesthetics are vasodilators.

a. 1, 3, 4 and 5 only
b. 1, 4 and 5 only
b. 1, 4 and 5 only
c. 1, 2 and 3 only
d. all of the above

Answer 8

b. 1, 4 and 5 only

(I had selected a, which is probably wrong because although benzocaine stays at application site longer, lidocaine, for example, doesn’t?)

Question 9

Off-centered perforation of the diaphragm of the anesthetic cartridge can cause:

a. the anesthetic cartridge to break
b. the harpoon to disengage from the stopper
c. improper aspiration
d. leakage of anesthetic solution into the patient’s mouth

Answer 9

d. leakage of anesthetic solution into the patient’s mouth

Question 10

Upon inserting the needle for an injection your patient experiences pain. What could be the cause of this?

a. needle deflection
b. a broken cartridge
c. a dull needle
d. a contaminated cartridge

Answer 10

c. a dull needle

Question 11

You begin to administer a PSA injection on your patient. Almost immediately she complains that she is experiencing a burning sensation. What could be the cause of this?

a. the anesthetic solution is expired
b. the pH of the anesthetic
c. the anesthetic solution was too warm
d. the cartridge was contaminated with alcohol
e. a, b and c only
f. all of the above

Answer 11

f. all of the above

Question 12

A large bubble is visible in the anesthetic cartridge. This is most likely an indication of which of the following:

a. the anesthetic solution was previously frozen
b. a nitrogen gas bubble
c. the anesthetic cartridge contents have been contaminated
d. all of the above

Answer 12

a. the anesthetic solution was previously frozen

Question 13

Referring to the previous questions, can you use this cartridge if a large bubble is present?

a. yes
b. no

Answer 13

b. no

Question 14

The major factor influencing one’s ability to aspirate successfully is:

a. the length of the needle
b. the gauge of the needle
c. the accuracy of the operator
d. the ease of movement of the rubber stopper

Answer 14

b. the gauge of the needle

Question 15

If your patient has asthma and sulfite allergies, which topical would be the best for you to use?

a. Benzocaine
b. Lidocaine

Answer 15

a. Benzocaine

Source?

Question 16

What is most likely the cause of a burning sensation upon administration of 2% Lidocaine with 1:100,000?

a. alkaline solution
b. presence of a vasoconstrictor
c. room temperature cartridge

Answer 16

b. presence of a vasoconstrictor

Question 17

Distilled water is added to anesthetic cartridges to:

a. make the solution isotonic
b. increase the volume of the solution
c. increase the duration of action of the local anesthetic drug
d. prevent oxidation of the vasoconstrictor

Answer 17

b. increase the volume of the solution

Question 18

When advancing the needle through tissue, the needle will automatically defect:

a. away from the bone
b. toward the bone
c. there will be no defection of the needle

Answer 18

a. away from the bone

Question 19

The most safe and reliable technique used to re-cap a needle without a needle guard is:

a. picking up the cap with one hand and then putting the needle in it with the other.
b. have someone else assist you in holding the cap while you place the needle in it.
c. using the “scoop” method

Answer 19

c. using the “scoop” method

Question 20

Once you have completed your injection and the procedure is complete, the needle can be disposed of:

a. in the garbage
b. it does not have to be disposed of, you can re-cap it and use it again
c. in the sharps container
d. a and c only
e. all of the above

Answer 20

c. in the sharps container

Question 21

How many time can you penetrate tissue before it is recommended that the needle be changed?
a. the needle must be changed after each injection
b. after 1-2 penetrations
c. after 3-4 penetrations
d. it is not necessary to ever change the needle

Answer 21

c. after 3-4 penetrations

Question 22

Which of the following statements are true?

a. A 25-gauge needle will deflect more than a 30-gauge needle b. A 25-gauge needle is more likely to break than a 30-gauge needle.
c. Aspiration is more reliable when using a 25-gauge needle rather than a 30-gauge needle.
d. All of the above statements are true.
e. Both a and c are true, but b is not

Answer 22

c. Aspiration is more reliable when using a 25-gauge needle rather than a 30-gauge needle.

Question 23

Which of the following is most likely to occur if a topical anesthetic agent is applied to the oral mucosa for an extended period of time?

a. Epithelial desquamation
b. A periapical abscess
c. Paresthesia
d. Hematoma

Answer 23

a. Epithelial desquamation

Question 24

Which of the following statements is true regarding Benzocaine topical?

a. Benzocaine is highly soluble in water
b. Benzocaine tends to be absorbed rapidly into the system of the patient.
c. Benzocaine tends to remain at the site of application.
d. Both a and b are correct.

Answer 24

c. Benzocaine tends to remain at the site of application

Question 25

Oraqix:
- ingredient(s)
- Onset
- Duration
- max dosage/appointment

Answer 25

Ingredients: 25mg/mL Lidocaine and 25mg/mL Prilocaine
Onset: 30 sec
Duration: 14-31 min (average 20 min)
Max. dosage: 5 cartridges (5x 1.7g = 8.5g gel)