Local Anesthesia Questions Quiz! Trivia
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Nerve impulses travel in myelinated nerves by a process called what?
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Domino effect
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Saltatory conducation
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Relative refractory
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Nodes of Ranvier
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Local anaesthesia questions quiz trivia. Anaesthesia is used by medical practitioners to sedate a patient in different body parts of the body. A patient is usually awake as the doctor works on their body, but they do not have any sensation in that body part. Do you think you know enough about this process of sedation and what it does See moreto the body? This quiz is a good way to refresh your memory.
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- 2.
Which portion of the nerve do local anesthetics work on?
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Neuron
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Dendrites
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Nerve membrane
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Myelinated sheath
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Schwann cells
Correct Answer
A. Nerve membraneExplanation
Anesthesia only works on the nerve membrane. It won't and doesn't need to penetrate the myelin sheath.Rate this question:
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- 3.
What is one important way that local anesthetic drugs differ from all other drugs used in dentistry?
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High potential of overdose
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Route of administration
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Rate of uptake into bloodstream
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Action ceased when absorbed into bloodstream
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Blood levels must be sufficient to exert effect
Correct Answer
A. Action ceased when absorbed into bloodstreamExplanation
All other drugs must pass into the bloodstream to be effective. LA cease to exert an effect once they enter the bloodstream.Rate this question:
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- 4.
When procaine undergoes metabolic breakdown, the major metabolic product (metabolite) is what?
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Pseudocholinesterase
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Chloroprocaine
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PAMA
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Succinylcholine
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Para-aminobenzoic acid
Correct Answer
A. Para-aminobenzoic acidExplanation
PABA - it is the byproduct of the metabolism of esters, and is what causes most allergic reactions.Rate this question:
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- 5.
Biotransformation of amides takes place where?
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Liver
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Kidneys
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Blood plasma
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Spleen
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Bloodstream
Correct Answer
A. LiverExplanation
The correct answer is liver. Biotransformation refers to the chemical alteration of a substance within an organism. In the case of amides, this process primarily occurs in the liver. The liver is responsible for metabolizing various substances, including drugs and toxins, through a series of enzymatic reactions. This biotransformation helps in the elimination of amides from the body and is an essential step in drug metabolism.Rate this question:
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- 6.
The concentration of epinephrine that is optimal for hemostasis is what?
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1:5000
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1:50,000
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1:150,000
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1:100,000
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1:200,000
Correct Answer
A. 1:50,000Explanation
The optimal concentration of epinephrine for hemostasis is 1:50,000. This means that for every 1 part of epinephrine, there are 50,000 parts of the solution. This concentration is commonly used in medical procedures to control bleeding because it constricts blood vessels, reducing blood flow to the area and promoting clotting.Rate this question:
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- 7.
All of the following are reasons to include a vasoconstrictor, EXCEPT one. Which one is the EXCEPTION?
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Lower blood flow to injection site
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Increase anesthetic blood levels
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Increase duration of local anesthetic
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Lower anesthetic toxicity
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Improve field of vision for treatment
Correct Answer
A. Increase anesthetic blood levelsExplanation
Epinephrine is added to decrease the level of absorption of the local anesthetic, for safety, profundity, to decrease bleeding, slow absorption, decrease local anesthetic blood levels, and increase local anesthetic at the injection site.Rate this question:
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- 8.
When it is necessary to administer more than one anesthetic drug, a safe total dose should be determined by not exceeding what?
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The lower of the two maximum doses for the individual agents
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The maximum dose of each drug being administered
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25% of the maximum dose of each drug being administered
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35% of the maximum dose of each drug being administered
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Dental work being done in many more than on quadrant
Correct Answer
A. The lower of the two maximum doses for the individual agentsExplanation
When a patient cannot get numb, use a vasodilator then a vasoconstrictor. Do not exceed the MRD of the lesser of the 2.Rate this question:
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- 9.
One of the many proprietary names for lidocaine is what?
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Xylocaine HCL
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3% Polocaine
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Sandonest HCL
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Mepivicaine
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Candicaine HCL
Correct Answer
A. Xylocaine HCLExplanation
The correct answer is Xylocaine HCL. Xylocaine HCL is one of the proprietary names for lidocaine, which is a local anesthetic commonly used in medical procedures. Lidocaine works by blocking nerve signals in the body, resulting in temporary numbness and pain relief. Xylocaine HCL is available in various forms such as injections, creams, and gels. It is widely used in dental procedures, minor surgeries, and as a numbing agent for skin conditions.Rate this question:
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- 10.
A healthy patient weighing 155 lbs has been given 2 cartridges of 2% lidocaine with epinephrine 1:100,000. How many MORE cartridges of 3% Arestocaine can they have?
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4.0
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4.2
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4.4
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4.6
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None
Correct Answer
A. 4.2Explanation
The concentration of lidocaine with epinephrine given to the patient is 2%. The question asks for the number of MORE cartridges of 3% Arestocaine the patient can have. Since the concentration of Arestocaine is higher than the lidocaine given, the patient can have more cartridges of Arestocaine. Among the given options, 4.2 is the only value that represents a higher concentration of Arestocaine. Therefore, the correct answer is 4.2.Rate this question:
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- 11.
All of the following are ways of caring for a syringe EXCEPT one. Which one is the EXCEPTION?
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Place in an ultrasonic bath
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Dismantle and lubricate every 5 uses
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Sharpen or replace harpoon as needed
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Rinse syringe of saliva and foreign matter
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Clean with an ultrasonic instrument
Correct Answer
A. Clean with an ultrasonic instrumentExplanation
When caring for a syringe, wash with soap and water, use a caviwipe, dismantle it and lube it every 5 times. Do not clean it with your ultrasonic.Rate this question:
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- 12.
In the dental office, the MOST important consideration when selecting a syringe-type is the ability of the syringe to:
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Deliver anesthetic solution to a patient
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Aspirate
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Accept a 30 guage needle
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Not frighten patients
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Be cost effective
Correct Answer
A. AspirateExplanation
The most important consideration when selecting a syringe-type in the dental office is its ability to aspirate. Aspiration is a crucial step in dental procedures as it ensures that the needle is properly positioned and prevents the injection of anesthetic solution into a blood vessel. By aspirating, dentists can check for blood return, which indicates that the needle is not in a blood vessel. This helps to minimize the risk of complications and ensure the effectiveness of the anesthetic solution.Rate this question:
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- 13.
In local anesthetic dissociation, tissues with a low pH would have what effect on base (RN) and cations (RNH+) in the solution?
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A lower protion of RN and a higher portion of RNH+
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A loswer protion of RNH+ and a higher portion of RN
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Rapid onset of local anesthetic
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Increase duration of local anesthetic
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Decrease potency of local anesthetic
Correct Answer
A. A lower protion of RN and a higher portion of RNH+Explanation
In summary, in tissues with a low pH (more acidic environment), local anesthetics exist in their ionized form (RNH+) rather than their non-ionized form (RN). This shift in ionization reduces the effectiveness of the local anesthetic, leading to a lower proportion of RN and a higher proportion of RNH+. As a result, the local anesthetic becomes less potent and has a shorter duration of action, making it less effective at blocking nerve impulses.Rate this question:
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- 14.
After properly loading the cartridge into the syringe, a few drops of local anesthetic should be expelled. Why?
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The ensure proper placement of the harpoon
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To ensure free flow of the solution
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The ensure the correct anesthetic has been used
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To ensure the needle has not been barbed
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To ensure the ability to aspirate
Correct Answer
A. To ensure free flow of the solutionExplanation
To make sure the local anesthetic is free flowing.Rate this question:
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- 15.
The major factor influencing the ability to aspirate is what?
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Gauge of the needle
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Size of clinician's hands
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Site of injection
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Size of thumb ring
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Harpoon being sterile
Correct Answer
A. Gauge of the needleExplanation
The diameter of the lumen or gauge of the needle.Rate this question:
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- 16.
All of the following methods will REDUCE the chance of needle breakage, EXCEPT one - which one is the exception?
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Establishing a firm hand rest
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Using a larger gauge needle
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Burying the needle to the hub
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Minimizing the need for redirection in tissue
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Not beding the needle excessively
Correct Answer
A. Burying the needle to the hubExplanation
Avoid needle breakage by not bending the needle, not redirecting the needle when embedded in tissue, never force the needle against resistance, do not bury needle to the hub, and by using a larger gauge (25 is best).Rate this question:
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- 17.
The antioxidant used to preserve epinephrine in a local anesthetic solution is:
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Sodium bisulfate
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Sodium bicarbonate
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Sodium chloride
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Sodium pentathol
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Sodium hydrochloride
Correct Answer
A. Sodium bisulfateExplanation
Sodium bisulfate is used as an antioxidant to preserve epinephrine in a local anesthetic solution. Antioxidants are substances that prevent the oxidation of other molecules, thereby protecting them from degradation or breakdown. In this case, sodium bisulfate helps to maintain the stability and effectiveness of epinephrine, which is a sensitive compound that can degrade over time. By inhibiting oxidation, sodium bisulfate ensures that the epinephrine remains potent and active in the local anesthetic solution.Rate this question:
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- 18.
A small bubble of approximately 1 to 2 mm diameter will frequently be found in the local anesthetic cartridge. These bubbles are caused by?
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The anesthetic solution being frozen
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The cartridge was stored in a chemical disinfectant
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Nitrogen gas being pumped in during manufacturing
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Oxygen being trapped in the cartridge
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Shaking the cartridge vigorously
Correct Answer
A. Nitrogen gas being pumped in during manufacturingExplanation
During the manufacturing process of the local anesthetic cartridge, nitrogen gas is pumped in. This is the reason why a small bubble of approximately 1 to 2 mm diameter is frequently found in the cartridge.Rate this question:
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- 19.
Distilled water is added to the cartridge for what purpose?
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To make the solution isotonic with the tissues of the body
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To increase the safely and the duration of the anesthetic
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To prevent the biodegradation of the vasopressor
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To provide the volume of the solution
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To prevent the propagation of nerve impulses
Correct Answer
A. To provide the volume of the solutionExplanation
Distilled water is added to the cartridge to provide the volume of the solution. This means that the water is added in order to increase the overall amount of solution in the cartridge, ensuring that there is enough liquid to administer the necessary dosage.Rate this question:
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- 20.
Topical antiseptic does which of the following?
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Numbs 2-3 mm of tissue prior to injection
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Makes patient more comfortable during initial penetration
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Lessens the chance of inflammation or infection
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Allows the clinician to practice their site of penetration
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Reduces the risk of a local anesthetic overdose
Correct Answer
A. Lessens the chance of inflammation or infectionExplanation
A topical anesthetic will disinfect the area, decrease infection, and decrease inflammation.Rate this question:
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- 21.
What is the MOST important reason hemostats/cotton roll pliers are part of the armamentarium?
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They are used to remove the Dentipatch
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They are used to place a cotton roll on the needle
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They are used for the retrieval of a broken needle
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They are used to place the plastic cap on the needle
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They are used to unscrew the needle from the syringe
Correct Answer
A. They are used for the retrieval of a broken needleExplanation
Hemostats/cotton roll pliers are an important tool in the armamentarium because they are specifically designed for the retrieval of a broken needle. In dental procedures, needles can occasionally break, and it is crucial to safely remove the broken piece to prevent any harm to the patient. Hemostats/cotton roll pliers have a strong grip and can securely grasp the broken needle, allowing the dentist to remove it without causing further damage or injury. This makes them an essential tool in dental practice to ensure patient safety and provide effective treatment.Rate this question:
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- 22.
At what time are professionals MOST at risk for a needle stick?
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Disassembly of syringe
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Recapping
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Assembling the syringe
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Giving the injection
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Unsheathing the needle
Correct Answer
A. RecappingExplanation
The most risk occurs while recapping the needle because then it's dirty.Rate this question:
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- 23.
All of the following are acceptable ways of recapping a needle EXCEPT:
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Carefully directing the cap over needle with fingers
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Utilizing "card" or other holding device
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Performing the one handed scoop technique
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Implementing cotton roll pliers or a hemostat
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Securing cap with fingers on vertical syringe
Correct Answer
A. Carefully directing the cap over needle with fingersExplanation
The correct answer is "Carefully directing the cap over needle with fingers" because this method poses a risk of accidental needlestick injuries. The other options mentioned, such as utilizing a holding device, performing the one-handed scoop technique, implementing cotton roll pliers or a hemostat, and securing the cap with fingers on a vertical syringe, are all acceptable ways to recap a needle safely and minimize the risk of injury.Rate this question:
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- 24.
Stacey, an 18-year-old soccer player, arrives for the extraction of teeth #4, 12, 20, and 28. She is given 5 cartridges of 4% Articaine with epi 1:100,000. Her mother calls 3 hours following the appointment stating that Stacey appears cyanotic and sluggish. Her nail beds look dark blue and the blood in the extraction sites is chocolate brown. What is MOST likely the condition presented?
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Aytpical plasma cholinesterase
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Methemoglobinemia
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Malignant hyperthermia
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Local anesthetic overdose
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Local anesthetic allergy
Correct Answer
A. MethemoglobinemiaExplanation
The symptoms described in the question, such as cyanosis (bluish discoloration of the skin), sluggishness, dark blue nail beds, and chocolate brown blood, are consistent with methemoglobinemia. Methemoglobinemia is a condition where the iron in hemoglobin is oxidized, resulting in reduced oxygen-carrying capacity of the blood. This can be caused by certain medications, including local anesthetics like Articaine. Therefore, the most likely condition presented in this case is methemoglobinemia due to the local anesthetic overdose.Rate this question:
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- 25.
A patient with epilepsy is scheduled for root planing and scaling with local anesthetic today. What should the dental hygienist know about this condition?
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Epilepsy is a realtive contraindication to ester type anesthtetics
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In low doses local anesthetic is an anti-convulsant
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The patient should be pre-medicated prior to treatment
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Epilepsy is an absolute contraindication to amide type anesthetics
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Oxygen should be available to deliver in an emergency
Correct Answer
A. In low doses local anesthetic is an anti-convulsantExplanation
Stress reduction protocol and no N2O. Local anesthetic and epi OK.Rate this question:
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Current Version
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Oct 06, 2023Quiz Edited by
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Mar 15, 2012Quiz Created by
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