Quiz 3 Flashcards
- 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
- c. breech-loading syringe
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
c. 25 gauge short
You should never bury the needle to which part?
a. the shank
b. the hub
c. the syringe penetrating end
d. the bevel
b. the hub
Which of the following topical anesthetics remains at the site of application the longest?
a. Benzocaine
b. Lidocaine
a. Benzocaine
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
a. the harpoon
Benzocaine topical is classified as an ester or amide?
a. Amide
b. Ester
b. Ester
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
“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.”
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
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?)
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
d. leakage of anesthetic solution into the patient’s mouth
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
c. a dull needle
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
f. all of the above
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
a. the anesthetic solution was previously frozen
Referring to the previous questions, can you use this cartridge if a large bubble is present?
a. yes
b. no
b. no
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
b. the gauge of the needle
If your patient has asthma and sulfite allergies, which topical would be the best for you to use?
a. Benzocaine
b. Lidocaine
a. Benzocaine
Source?
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
b. presence of a vasoconstrictor
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
b. increase the volume of the solution
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
a. away from the bone
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
c. using the “scoop” method
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
c. in the sharps container
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
c. after 3-4 penetrations
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
c. Aspiration is more reliable when using a 25-gauge needle rather than a 30-gauge needle.
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
a. Epithelial desquamation
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.
c. Benzocaine tends to remain at the site of application
Oraqix:
- ingredient(s)
- Onset
- Duration
- max dosage/appointment
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)
