Question 1

Match the following:
-Articaine
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

Articaine has a maximum recommended dose (MRD) of 3.2 mg per pound of body weight.

Question 2

Match the following:
-Bupivacaine
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

Bupivacaine has a maximum recommended dose (MRD) of 90 mg.

Question 3

Match the following:
-Cardiac dose
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

The cardiac dose refers to the maximum recommended dose (MRD) of epinephrine for patients with cardiovascular disease, which is 0.04 mg.

Question 4

Match the following:
-Cartridge volume
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

A standard dental anesthetic cartridge typically contains 1.8 ml of solution.

Question 5

Match the following:
-Clark's rule
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

Clark's rule is a method used to calculate the appropriate dose of medication for a child, based on the child's weight.

Question 6

Match the following:
-Levonordefrin
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

Levonordefrin is a vasoconstrictor used in local anesthetics, and the maximum recommended dose (MRD) is 1.0 mg.

Question 7

Match the following:
-Lidocaine
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

The answer of Match the following:
-Lidocaine
A) MRD 90 mg
B) MRD...

Question 8

Match the following:
-Mepivacaine
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

Mepivacaine is a local anesthetic that is used in dentistry. It is available in cartridges that contain 54 mg of mepivacaine.

Question 9

Match the following:
-Prilocaine
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

The answer of Match the following:
-Prilocaine
A) MRD 90 mg
B) MRD...

Question 10

Match the following:
-Young's rule
A) MRD 90 mg
B) MRD 0.04 mg
C) 3.2 mg/lb
D) 3.6 mg/lb
E) MRD 500 mg
F) 54 mg/cartridge
G) Based on child's weight
H) 1.8 ml
I) MRD 1.0 mg
J) Based on child's age

Accepted Answer

Young's rule is a method used to calculate the appropriate dose of medication for children based on their age. It involves comparing the child's age to the sum of their age plus 12 to determine the fraction of the adult dose to give to the child.

Question 11

The maximum recommended dose for each solution is dependent on the drug that limits the total volumes that may be delivered.

Accepted Answer

The maximum recommended dose for each solution is indeed dependent on the drug that limits the total volumes that may be delivered, as different drugs have different safety profiles and therapeutic windows, determining how much can be safely administered.

Question 12

In solutions containing both a local anesthetic and a vasoconstrictor drug, the maximum recommended dose of the local anesthetic is usually the limiting drug.

Accepted Answer

The vasoconstrictor drug is usually the limiting factor in determining the maximum recommended dose because it can have systemic cardiovascular effects, whereas local anesthetics primarily affect the site of application.

Question 13

The maximum safe dose of 1:50,000 epinephrine per appointment for a healthy adult is 0.2 mg or 5.5 cartridges.

Accepted Answer

The maximum safe dose of 1:50,000 epinephrine per appointment for a healthy adult is 0.2 mg or 5.5 cartridges.

Question 14

At a concentration of 4%, the amount of drug in a 1.8 ml cartridge is 7.2 mg.

Accepted Answer

At a concentration of 4%, the amount of drug in a 1.8 ml cartridge is 72 mg 4% solution = 40 mg/ml x 1.8 = 72 mg/cartridge.

Question 15

At a concentration of 0.5%, the amount of drug in a 1.8 ml cartridge is 9 mg.

Accepted Answer

To find the amount of drug in a 1.8 ml cartridge at a concentration of 0.5%, you multiply the volume of the cartridge (1.8 ml) by the concentration (0.5%) expressed as a decimal (0.005). This calculation gives you 0.009 liters * 1000 mg/g = 9 mg.

Question 16

To calculate the milligrams of drug delivered, multiply the total number of cartridges by the total milligrams of drug in each cartridge.

Accepted Answer

To calculate the total milligrams of drug delivered, you multiply the number of cartridges used by the milligrams of drug contained in each cartridge. This gives you the total milligrams of the drug administered.

Question 17

When two different drugs are injected, the total of the MRDs for both drugs is the maximum number of milligrams of drugs the patient may receive.

Accepted Answer

When multiple drugs are administered with different MRDs, the lowest MRD (most toxic drug) is applied when calculating total drug doses.

Question 18

Calculations of maximum safe doses for vasoconstrictors are determined by mg/lb or mg/kg.

Accepted Answer

Calculations of vasoconstrictor doses are different compared to those used to determine local anesthetic drug doses. The main differences are that vasoconstrictors are expressed as dilution ratios rather than concentration percentages and maximum doses of vasoconstrictors are not weight dependent.

Question 19

The maximum safe dose of 1:200,000 epinephrine per appointment for a patient with ischemic heart disease is 0.4 mg or 1.1 cartridges.

Accepted Answer

The maximum safe dose of 1:200,000 epinephrine per appointment for a patient with ischemic heart disease is 0.04 mg or 4 cartridges (about 4.4, rounded down for safety to 4).

Question 20

Clark's rule for determining pediatric drug doses is based on a child's weight divided by 150 to get the approximate fraction of the adult dose.

Accepted Answer

Clark's rule is a formula used in pharmacology to calculate the appropriate dosage of a medication for children. It involves dividing the child's weight in pounds by 150, then multiplying the result by the adult dose to get the child's dose.

Quiz 7: Dose Calculations for Local Anesthetic Solutions

Match the following: -Articaine

Match the following: -Bupivacaine

Match the following: -Cardiac dose

Match the following: -Cartridge volume

Match the following: -Clark's rule

Match the following: -Levonordefrin

Match the following: -Lidocaine

Match the following: -Mepivacaine

Match the following: -Prilocaine

Match the following: -Young's rule

The maximum recommended dose for each solution is dependent on the drug that limits the total volumes that may be delivered.

In solutions containing both a local anesthetic and a vasoconstrictor drug, the maximum recommended dose of the local anesthetic is usually the limiting drug.

The maximum safe dose of 1:50,000 epinephrine per appointment for a healthy adult is 0.2 mg or 5.5 cartridges.

At a concentration of 4%, the amount of drug in a 1.8 ml cartridge is 7.2 mg.

At a concentration of 0.5%, the amount of drug in a 1.8 ml cartridge is 9 mg.

To calculate the milligrams of drug delivered, multiply the total number of cartridges by the total milligrams of drug in each cartridge.

When two different drugs are injected, the total of the MRDs for both drugs is the maximum number of milligrams of drugs the patient may receive.

Calculations of maximum safe doses for vasoconstrictors are determined by mg/lb or mg/kg.

The maximum safe dose of 1:200,000 epinephrine per appointment for a patient with ischemic heart disease is 0.4 mg or 1.1 cartridges.

Clark's rule for determining pediatric drug doses is based on a child's weight divided by 150 to get the approximate fraction of the adult dose.