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Nurse Dive Free Nursing Practice Question
A medication order is for 0.5 g of a drug. The available dose is 250 mg tablets. How many tablets will you administer?
A. 1 tablet
Calculation: Ordered Dose = 0.5 g Available Dose = 250 mg Convert Ordered Dose to mg Ordered Dose = 0.5 × 1000 = 500 mg Number of tablets = Ordered Dose / Available Dose = 500 / 250 = 2 tablets
B. 3 tablets
Calculation: Ordered Dose = 0.5 g Available Dose = 250 mg Convert Ordered Dose to mg Ordered Dose = 0.5 × 1000 = 500 mg Number of tablets = Ordered Dose / Available Dose = 500 / 250 = 2 tablets
C. 2 tablets
Calculation: Ordered Dose = 0.5 g Available Dose = 250 mg Convert Ordered Dose to mg Ordered Dose = 0.5 × 1000 = 500 mg Number of tablets = Ordered Dose / Available Dose = 500 / 250 = 2 tablets
D. 4 tablets
Calculation: Ordered Dose = 0.5 g Available Dose = 250 mg Convert Ordered Dose to mg Ordered Dose = 0.5 × 1000 = 500 mg Number of tablets = Ordered Dose / Available Dose = 500 / 250 = 2 tablets
This question is an excerpt from Nurse Dive's nursing test bank - Ati Lpn Med Math Proctored Exam. Take the full exam now
Full Explanation
Calculation:
Ordered Dose = 0.5 g
Available Dose = 250 mg
- Convert Ordered Dose to mg
Ordered Dose = 0.5 × 1000 = 500 mg
Number of tablets = Ordered Dose / Available Dose
= 500 / 250
= 2 tablets
Similar Questions
How does one ensure that the final answer in a dimensional analysis problem is appropriate for the clinical situation?
A. By asking a colleague to verify the calculation
By asking a colleague to verify the calculation: Verification by a colleague is helpful for accuracy, but it does not ensure the answer makes sense in the clinical context or that it is safe for the patient.
B. By using clinical reasoning to assess the practicality and safety of the answer
By using clinical reasoning to assess the practicality and safety of the answer: Applying clinical reasoning allows the nurse to evaluate whether the calculated dose is appropriate for the patient’s age, weight, and condition. This step ensures the final answer is not only mathematically correct but also safe and realistic for administration.
C. By ensuring all units are converted to metric
By ensuring all units are converted to metric: Converting units is necessary for accurate calculations, but correct units alone do not guarantee the dose is clinically appropriate or safe for the patient.
D. By double-checking the math calculations
By double-checking the math calculations: Double-checking math prevents numerical errors, yet it does not assess whether the result is reasonable or safe for the specific clinical situation.
Full Explanation
Rationale:
A. By asking a colleague to verify the calculation: Verification by a colleague is helpful for accuracy, but it does not ensure the answer makes sense in the clinical context or that it is safe for the patient.
B. By using clinical reasoning to assess the practicality and safety of the answer: Applying clinical reasoning allows the nurse to evaluate whether the calculated dose is appropriate for the patient’s age, weight, and condition. This step ensures the final answer is not only mathematically correct but also safe and realistic for administration.
C. By ensuring all units are converted to metric: Converting units is necessary for accurate calculations, but correct units alone do not guarantee the dose is clinically appropriate or safe for the patient.
D. By double-checking the math calculations: Double-checking math prevents numerical errors, yet it does not assess whether the result is reasonable or safe for the specific clinical situation.
If a medication dosage reads '1/2 cup,' how many milliliters should the nurse prepare?
A. 240 ml
Calculation: Ordered Dose = 1/2 cup Conversion: 1 cup = 240 mL Volume in mL = Number of cups × 240 mL = 1/2 × 240 = 120 mL
B. 180 ml
Calculation: Ordered Dose = 1/2 cup Conversion: 1 cup = 240 mL Volume in mL = Number of cups × 240 mL = 1/2 × 240 = 120 mL
C. 60 ml
Calculation: Ordered Dose = 1/2 cup Conversion: 1 cup = 240 mL Volume in mL = Number of cups × 240 mL = 1/2 × 240 = 120 mL
D. 120 ml
Calculation: Ordered Dose = 1/2 cup Conversion: 1 cup = 240 mL Volume in mL = Number of cups × 240 mL = 1/2 × 240 = 120 mL
Full Explanation
Calculation:
Ordered Dose = 1/2 cup
Conversion: 1 cup = 240 mL
Volume in mL = Number of cups × 240 mL
= 1/2 × 240
= 120 mL
What is the first step in setting up a drug dosage calculation using the formula method?
A. Determine the frequency of administration
Determine the frequency of administration: While knowing how often a medication is given is important for overall therapy, it is not the first step in setting up the formula for calculating a single dose. Frequency comes into play after the dose is determined.
B. Check the patient's current medications
Check the patient's current medications: Reviewing the patient’s medication list is essential for safety and preventing interactions, but it is a preparatory step rather than the initial step in the formula calculation.
C. Assess the patient's vital signs
Assess the patient's vital signs: Vital signs provide important clinical information that may influence drug administration, but they do not initiate the formula-based calculation of a specific dose.
D. Identify the desired dose (D)
Identify the desired dose (D): The first step in using the formula D/H × Q is to determine the desired dose prescribed for the patient. This value is essential for calculating the correct amount of medication to administer safely and accurately.
Full Explanation
Rationale:
A. Determine the frequency of administration: While knowing how often a medication is given is important for overall therapy, it is not the first step in setting up the formula for calculating a single dose. Frequency comes into play after the dose is determined.
B. Check the patient's current medications: Reviewing the patient’s medication list is essential for safety and preventing interactions, but it is a preparatory step rather than the initial step in the formula calculation.
C. Assess the patient's vital signs: Vital signs provide important clinical information that may influence drug administration, but they do not initiate the formula-based calculation of a specific dose.
D. Identify the desired dose (D): The first step in using the formula D/H × Q is to determine the desired dose prescribed for the patient. This value is essential for calculating the correct amount of medication to administer safely and accurately.