ATI Dosage Calculation
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Free ATI Dosage Calculation Questions
The physician orders 20 mEq of potassium chloride in 50 mL 0.9% NS to infuse over 2 hours. Calculate the flow rate in milliliters per hour.Round your answer to the nearest whole number
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25 mL/h
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30 mL/h
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20 mL/h
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35 mL/h
Explanation
Correct answer: A. 25 mL/h
Detailed explanation of the correct answer:
To calculate the flow rate in milliliters per hour for the potassium chloride infusion:
Use the flow rate formula:
Flow rate = Total volume ÷ Time
Substitute the given values:
Total volume = 50 mL
Time = 2 hours
Calculate the flow rate:
Flow rate = 50 mL ÷ 2 hours
Flow rate = 25 mL/h
Explanation of why the other options are incorrect:
B. 30 mL/h is incorrect because it overestimates the required flow rate.
C. 20 mL/h is incorrect because it underestimates the required flow rate.
D. 35 mL/h is incorrect because it overestimates the required flow rate.
Summary:
The nurse should set the IV pump to deliver 25 mL/h for the potassium chloride infusion.
The healthcare provider prescribed 2 liters of 5% dextrose in water (DsW) to infuse in 24 hours. The IV administration set delivers 15 gtt/mL. How many mL/hour should the nurse program the infusion pump? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
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75 mL/hour
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83 mL/hour
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88 mL/hour
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91 mL/hour
Explanation
Correct Answer: B. 83 mL/hour
Detailed Explanation of the Correct Answer:
Step 1: Convert liters to milliliters.
2 liters = 2 × 1,000 = 2,000 mL
Step 2: Use the formula to calculate mL/hour:
mL/hour = Total volume (mL) ÷ Time (hr)
mL/hour = 2,000 ÷ 24
mL/hour = 83.33
Step 3: Round to the nearest whole number:
83.33 ≈ 83 mL/hour
Explanation of Incorrect Options:
A. 75 mL/hour underestimates the infusion rate and would not deliver the full 2 liters in 24 hours.
C. 88 mL/hour is too fast and would complete the infusion before 24 hours.
D. 91 mL/hour overestimates the required rate and would complete the infusion much too early.
Summary:
To infuse 2,000 mL over 24 hours, divide 2,000 ÷ 24 = 83.33 and round to 83 mL/hour, making the correct answer B. 83 mL/hour.
The physician orders KCI 20 mEq po daily for hypokalemia. The medication is supplied in 40 mEq/15 mL. How many milliliters will the nurse administer? Please answer to nearest tenth.
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5.0 mL
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7.5 mL
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10.0 mL
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12.0 mL
Explanation
Correct answer: B. 7.5 mL
Detailed explanation of the correct answer:
To calculate the volume of KCl to administer, we use the formula:
Volume (mL) = Desired dose (mEq) ÷ Concentration (mEq/mL)
Given:
Desired dose = 20 mEq
Concentration = 40 mEq/15 mL
First, calculate the concentration:
Concentration = 40 mEq ÷ 15 mL = 2.67 mEq/mLNow, calculate the volume:
Volume = 20 mEq ÷ 2.67 mEq/mL ≈ 7.5 mL
Explanation of why the other options are incorrect:
A. 5.0 mL is incorrect because it would only deliver 13.33 mEq, not the prescribed 20 mEq.
C. 10.0 mL is incorrect because it would deliver 26.67 mEq, exceeding the prescribed dose.
D. 12.0 mL is incorrect because it would deliver 32 mEq, which is much more than the prescribed 20 mEq.
Summary:
The nurse should administer 7.5 mL of KCl to deliver the prescribed 20 mEq dose.
A patient is to take potassium chloride oral solution 30 mEq daily in two divided doses.
If the pharmacy stocks potassium chloride 40 mEq/15 mL, how many milliliters will each dose be?
Select one:
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5.6
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7.5
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11.3
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12
Explanation
Correct Answer:
A. 5.6
Explanation of Correct Answer:
Identify the information given:
Total daily dose = 30 mEq.
Divided into 2 doses → each dose = 30 ÷ 2 = 15 mEq.
Concentration = 40 mEq/15 mL.
Set up the proportion to find how many milliliters are needed for 15 mEq:
Volume (mL) = Dose (mEq) ÷ Concentration (mEq/mL)
First find concentration per mL:
40 mEq ÷ 15 mL = 2.666... mEq/mL.
Now calculate the volume for 15 mEq:
Volume = 15 mEq ÷ 2.666... mEq/mL
Volume ≈ 5.6 mL per dose.
Why the Other Options are Incorrect:
B. 7.5 mL would deliver more than 15 mEq and is therefore too much.
C. 11.3 mL would deliver even more, which is significantly higher than required.
D. 12 mL would provide close to 32 mEq, exceeding the daily prescription.
Summary:
Each dose should be 5.6 mL to deliver the correct amount of potassium chloride. The correct answer is A. 5.6.
A nurse is preparing to administer cefazolin 1 g intermittent IV bolus in 0.9% sodium chloride 250 mL over 30 min. The drop factor on the manual IV tubing is 10 gtt/mL. The nurse should set the manual IV flow rate to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
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83 gtt/min
Explanation
Correct Answer: 83 gtt/min
Using the formula: (Volume in mL × Drop factor) ÷ Time in minutes = (250 mL × 10 gtt/mL) ÷ 30 min = 2,500 ÷ 30 = 83.3 → rounded to 83 gtt/min
The total volume is multiplied by the drop factor to get the total number of drops, then divided by the infusion time in minutes to get the flow rate in drops per minute.
The healthcare provider (HCP) prescribes erythromycin suspension 250 mg PO every 6 hours for a child with streptococcal pharyngitis. The drug is available in a suspension labeled, "200 mg/5 mL." How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest hundredth.)
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5.5 mL
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6.25 mL
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6.5 mL
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7.5 mL
Explanation
Correct Answer: B. 6.25 mL
Why this answer is correct:
To determine the volume to administer, use the formula:
Desired dose (mg) ÷ Concentration (mg/mL) = Volume (mL)
Given:
Desired dose: 250 mg
Concentration: 200 mg/5 mL
Step 1: Convert the concentration to mg/mL:
200 mg ÷ 5 mL = 40 mg/mL
Step 2: Calculate the volume needed for the prescribed dose:
250 mg ÷ 40 mg/mL = 6.25 mL
Why the other options are wrong:
A. 5.5 mL – This would deliver only 220 mg, less than the prescribed 250 mg.
C. 6.5 mL – This would deliver 260 mg, which is slightly higher than the prescribed 250 mg.
D. 7.5 mL – This would deliver 300 mg, which exceeds the prescribed dose.
Summary:
To administer 250 mg of erythromycin, the nurse should provide 6.25 mL of the suspension. The correct answer is B. 6.25 mL.
The physician orders Cipro 750 mg po twice a day for sinusitis. The medication is supplied in 500-mg tablets. How many tablets will the nurse administer per dose? Please answer to nearest tenth
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1 tablet
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1.5 tablets
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2 tablets
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2.5 tablets
Explanation
Correct answer: B. 1.5 tablets
Detailed explanation of the correct answer:
To calculate the number of tablets the nurse should administer per dose:
Identify the dose and tablet strength
The physician ordered 750 mg, and the medication is supplied in 500-mg tablets.
Apply the formula to calculate the number of tablets
Number of tablets = Dose required ÷ Tablet strength
Now, plug in the values:
Number of tablets = 750 mg ÷ 500 mg = 1.5 tablets
Explanation of why the other options are incorrect:
A. 1 tablet is incorrect because it would not provide the full dose of 750 mg.
C. 2 tablets are incorrect because it would result in an excess dose of 1000 mg.
D. 2.5 tablets are incorrect because it would also result in an excess dose of 1250 mg.
Summary:
The nurse should administer 1.5 tablets per dose to meet the ordered dose of 750 mg.
A nurse is reviewing instructions with an adolescent client who is to take calcium carbonate 1,300 mg PO daily. After reviewing the medication label below, the nurse should instruct the client that one tablet contains how many mg of calcium carbonate? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
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650 mg
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1,000 mg
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1,300 mg
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2,600 mg
Explanation
Correct answer: A. 650 mg
Detailed explanation of the correct answer:
The medication label clearly states that each tablet contains 650 mg of calcium carbonate. Therefore, the nurse should instruct the client that one tablet contains 650 mg.
Explanation of why the other options are incorrect:
B. 1,000 mg is incorrect because it is not the correct amount per tablet, and the label specifies 650 mg per tablet.
C. 1,300 mg is the total daily dose, not the amount in one tablet.
D. 2,600 mg is incorrect because it is double the required daily dose and does not represent the amount in one tablet.
Summary:
The correct amount in one tablet is 650 mg of calcium carbonate.
A nurse is preparing to administer risperidone 25 mg IM. After reading the label, how many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)
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2.5 mL
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3.0 mL
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3.33 mL
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3.5 mL
Explanation
Correct answer: C. 3.33 mL
Detailed explanation of the correct answer:
To calculate how many mL the nurse should administer for a 25 mg IM dose when the available concentration is 37.5 mg/5 mL, follow these steps:
Step 1: Determine the concentration per mL:
37.5 mg ÷ 5 mL = 7.5 mg/mL
Step 2: Calculate how many mL are needed for a 25 mg dose:
25 mg ÷ 7.5 mg/mL = 3.33 mL
Explanation of why the other options are incorrect:
A. 2.5 mL is incorrect because it would provide a lower dose than needed.
B. 3.0 mL is incorrect because it would provide a dose of 22.5 mg, not the required 25 mg.
D. 3.5 mL is incorrect because it would provide a higher dose than needed.
Summary:
The nurse should administer 3.33 mL of risperidone.
A client with Parkinson's disease is receiving benztropine (Cogentin) 3.5 mg PO twice daily. The medication is available in 0.5 mg tablets. How many tablets should the nurse administer for each dose? (Enter numeric value only.)
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6 tablets
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7 tablets
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8 tablets
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9 tablets
Explanation
Correct Answer:
B. 7 tablets
Explanation of Correct Answer:
The prescribed dose is 3.5 mg.
Each tablet contains 0.5 mg of benztropine.
To calculate the number of tablets to administer, divide the prescribed dose by the strength of each tablet:
3.5 mg ÷ 0.5 mg/tablet = 7 tablets.
Why the Other Options are Incorrect:
A. 6 tablets is incorrect because it provides only 3.0 mg, which is less than the prescribed 3.5 mg.
C. 8 tablets is incorrect because it would provide 4.0 mg, which exceeds the prescribed dose.
D. 9 tablets is incorrect because it would provide 4.5 mg, which is too much.
Summary:
The nurse should administer 7 tablets of benztropine (Cogentin) for each dose. The correct answer is B. 7 tablets.
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Frequently Asked Question
ULOSCA integrates step-by-step problem-solving techniques and scenario-based questions that mimic real-world nursing situations. By combining practice questions with real-life applications, it enhances your ability to calculate accurate dosages and reduce medication errors.
Absolutely. ULOSCA’s resources include specific modules on weight-based and pediatric dosages, guiding you through complex calculations. It ensures you understand the nuances of adjusting doses based on age, weight, and medical conditions, a critical component of the ATI Dosage Calculation exam.
ULOSCA provides detailed formulas, practice questions, and case studies focused on IV calculations. It teaches you how to calculate flow rates, infusion times, and drip factors accurately, essential for both the exam and clinical practice.
Yes, ULOSCA includes test-taking strategies that help you analyze complex dosage problems, manage exam time effectively, and identify key information in medication orders. These strategies are designed to enhance your confidence and performance on the ATI Dosage Calculation exam.
ULOSCA emphasizes the "Five Rights" of medication administration (right patient, drug, dose, route, and time) in every aspect of its resources. By integrating safety protocols into practice questions and case studies, it reinforces safe medication practices for both exams and real-world scenarios.
Yes, ULOSCA includes a comprehensive review of basic math skills required for dosage calculations, such as fractions, decimals, ratios, and percentages. It ensures you have a solid foundation to tackle all types of dosage problems confidently.
ULOSCA provides diverse study tools, including interactive case studies, quizzes, visual aids, and written guides. This ensures that students with varying learning styles—visual, hands-on, or auditory—can effectively prepare for the ATI Dosage Calculation exam.