Dosage Calculations
Question Bank
Course Introduction
Dosage Calculations is a foundational course designed to equip students with the mathematical skills necessary to accurately calculate medication dosages for patients in various healthcare settings. The course covers key concepts such as measurement systems (metric, household, and apothecary), conversions between units, interpreting medication orders, and calculating oral, parenteral, and intravenous dosages. Emphasis is placed on ensuring patient safety through the application of formulas, dimensional analysis, ratio and proportion methods, and critical thinking in pharmaceutical calculations. Through practical exercises and real-world scenarios, students will develop competency and confidence in performing dosage calculations essential for effective and safe medication administration.
Recommended Textbook
Calculate with Confidence 6th Edition by Morris
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25 Chapters
590 Verified Questions
590 Flashcards
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Chapter 1: Roman Numerals
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11 Verified Questions
11 Flashcards
Source URL: https://quizplus.com/quiz/70226
Sample Questions
Q1) Write the following Arabic number as a lowercase Roman numeral.
21 = _____
Answer: xxi
Q2) Perform the indicated operation and record the result in lowercase Roman numerals.
13 + 7 = _____
Answer: xx
Q3) Perform the indicated operation and record the result in lowercase Roman numerals.
12 \(\div\) 2 = _____
Answer: vi
Q4) Perform the indicated operation and record the result in lowercase Roman numerals.
10 + 2 = _____
Answer: xii
Q5) Perform the indicated operation and record the result in lowercase Roman numerals.
30 - 6 = _____
Answer: xxiv
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Chapter 2: Fractions
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42 Verified Questions
42 Flashcards
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Sample Questions
Q1) Perform the indicated operation and reduce to lowest terms. 3/5 \(\div\) 5 = _____
Answer: 3/25
Q2) Perform the indicated operation with fractions.Reduce to lowest terms as indicated. 15/21 - 10/21 = _____
Answer: 5/21
Q3) Perform the indicated operation with fractions.Reduce to lowest terms as indicated. 3 1/5 + 3 2/3 + 2 1/2= _____
Answer: 12 11/30
Q4) Reduce the following fraction to lowest terms. 105/135 = _____
Answer: 7/9
Q5) A client is supposed to drink a 10 ounce (oz)bottle of magnesium citrate before an X-ray study.The client was able to drink 4 oz.How much of the magnesium citrate remains? (Express answer as a fraction reduced to lowest terms. )______
Answer: 2/5 bottle
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4
Chapter 3: Decimals
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35 Verified Questions
35 Flashcards
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Sample Questions
Q1) Round off the following decimal to the nearest tenth.
28.66 = _____
Answer: 28.7
Q2) One dose of vaccine is 1.25 mL.How much vaccine is needed to vaccinate 55 clients in a clinic? (Round answer to the nearest tenth. )_____
Answer: 68.8 mL
Q3) Divide the following decimal.Express answer to nearest hundredth.
0.1 \(\div\) 0.375 = _____
Answer: 0.27
Q4) Round off the following decimal to the nearest tenth. 1.45 = _____
Answer: 1.5
Q5) Perform the indicated operation with decimals.
64.1 - 0.009 = _____
Answer: 64.091
Q6) A client weighed 165.4 pounds (lb)before getting ill.After a lengthy recovery the client weighed 148.6 lb.How much weight did the client lose? _____
Answer: 16.8 lb
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Chapter 4: Ratio and Proportion
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25 Flashcards
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Sample Questions
Q1) Solve for x in the following. 4/2.6 = 5/x
x = _____
Q2) If three tablets (tabs)contain 60 mg,how many tabs would need to be given for 80 mg? ______
Q3) Solve for x in the following. 0.5/0.125 = x/4
x = _____
Q4) If 5oz of a solution contains 4 1/2 oz of water,how many oz of water are in 20 oz of solution? _______
Q5) Solve for x. 42: 7 = 48: x
x = ______
Q6) If 100 grams (g)of ice cream contains 20 g of fat,how many g of fat are there in 300 g of ice-cream? ______
Q7) Express the following dosage as a ratio. An injectable solution contains 500 mg in each 0.7 mL: _____
Q8) Solve for x. 2: 9 = x: 27
x = _____
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Chapter 5: Percentages
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20 Flashcards
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Sample Questions
Q1) A client has received 45% of a 500 mL bag of intravenous (IV)solution.How many mL of IV solution has the client received?
Q2) Change the following percentage to a fraction.Reduce to lowest terms. 37.5% = _____
Q3) Change the following percentage to a ratio. 0.4% = _____
Q4) A client is responsible for 30% of his doctor bills due to insurance.The client sees a specialist and the bill is $240.00.How much will the client be responsible for?
Q5) Convert 0.925 to a percent.
Q6) Convert 84.75% to decimal form.
Q7) A client drank 3 ounces (oz)of a glass of apple juice.This was 75% of the full amount.What was the full amount of apple juice?
Q8) Convert 42.5% to decimal form.
Q9) Change the following percentage to a ratio and its decimal equivalent. 8% = _____;_____
Q10) Change the following percentage to a ratio and its decimal equivalent. 45% = _____;_____
Q11) Convert 2.96 to a percent.
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Chapter 6: Metric System
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Sample Questions
Q1) Three and one-half kilograms
A)3.5 kg
B)3.05 kg
C)3kg
D)3.5 kg.
Q2) Directions: Write the equivalent indicated. 20 mg = ________ g
Q3) Directions: Write the equivalent indicated.
8.3 L = _____ mL
Q4) Directions: Write the equivalent indicated.
5.2 kg = _____ g
Q5) Directions: Write the equivalent indicated. 3,120 mcg = _____ mg
Q6) Directions: Write the equivalent indicated. 0.081 g = _____ mg
Q7) Eight-tenths of a milliliter
A)8/10 ml
B).8 mL
C)0.8 mL
D)ml 0.8
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Chapter 7: Apothecary and Household Systems
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31 Verified Questions
31 Flashcards
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Sample Questions
Q1) Directions: Write the equivalent indicated.
2 1/4 cup = _____ mL
Q2) Directions: Write the equivalent indicated. 15 mL = _____ oz
Q3) Directions: Write the equivalent indicated.
5 1/4 pt = ______ mL
Q4) Milliequivalent is a unit used to measure the ionic activity of a medication.
A)True
B)False
Q5) Directions: Write the equivalent indicated.
43.75 mL = ________ tsp
Q6) Directions: Write the equivalent indicated.
255 mL = _____ oz
Q7) Directions: Write the equivalent indicated.
5 t = _____ mL
Q8) Directions: Write the equivalent indicated. 16 T = _____ mL
9
Q9) Directions: Express the following value correctly. 2.75 OZ
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Chapter 8: Converting Within and Between Systems
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Sample Questions
Q1) Directions: Write the equivalent indicated. 0.3 mg = _____ g
Q2) Directions: Write the equivalent indicated.
4 1/4 qt = _____ mL
Q3) Directions: Write the equivalent indicated. 1 mg = _____ g
Q4) A client's intake was the following: 1/8 qt of milk
1 1/4 cup of coffee (1 cup = 6 oz)
3 oz water
2 oz of chicken broth
a.Intake: ________ mL
b.Intake: ________ L
Q5) A client reports drinking 48 oz of water on a visit to the clinic.How many mL did the client drink? _________ mL
Q6) A client has an order for Maalox 30 mL p.o.at bedtime.How many tsb will the nurse instruct the client to take? _____ tsb
Q7) Directions: Write the equivalent indicated. 2 oz = _____ tbs
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Chapter 9: Additional Conversions Useful in the Health Care Setting
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Sample Questions
Q1) Directions: Convert the following weight as indicated.Round weight to the nearest tenth.
14 lb,4 oz = _____ kg
Q2) Directions: Convert the following time to international time. 10:19 PM _________________
Q3) Directions: Convert the following weight as indicated.Round weight to the nearest tenth.
7.6 kg = _____ lb
Q4) Directions: Convert the following weight as indicated.Round weight to the nearest tenth.
134 lb = _____ kg
Q5) A client is to take a medication every 6 hours.The first dose is 6:30 AM.What time will the client take the next two doses?
a.Traditional time _________________
b.International time ________________
Q6) Directions: Convert the following time to international time. 2:35 AM _________________
12
Q7) Directions: Convert the following time to traditional time. 2146 ___________
Q8) A wound measures 4.2 cm in length.How many mm is this? _____ mm
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Chapter 10: Medication Administration
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18 Flashcards
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Sample Questions
Q1) A nurse who administers a medication that is unsafe is liable for the error.
A)True
B)False
Q2) Directions: Complete the following sentence with the correct word or number. The use of mixed case or enlarged,bolded lettering to differentiate medications with look-alike names is called __________ lettering.
Q3) Medication errors (select all that apply):
A)are preventable.
B)are less prevalent in children and elderly.
C)cause an increase in health care cost.
D)can occur when the six rights of medication administration are not adhered to.
E)can result in tragic outcomes including death.
Q4) A dropper is safe to use when administering medications when it is used for the specific medication it is calibrated to.
A)True
B)False
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Chapter 11: Understanding and Interpreting Medication
Orders
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Sample Questions
Q1) The abbreviation OD should not be used to indicate right eye in a medication order.
A)True B)False
Q2) Directions: Correct the following medication order using the ISMP list of Error-Prone Abbreviations,Symbols,and Dose Designations. Robitussin 15 cc po q6h prn
Q3) The nurse is responsible for determining the times for a medication ordered t.i.d.at an institution.
A)True B)False
Q4) Directions: Correct the following medication order using the ISMP list of Error-Prone Abbreviations,Symbols,and Dose Designations. Motrin 400 mg po q6h prn for back pain
Q5) Verbal orders should be accepted only in _______________.
Q6) Directions: Give the abbreviation for the following. Every hour: _____
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Chapter 12: Medication Administration Records and Medication
Distribution
Systems
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Sample Questions
Q1) Directions: Refer to the portion of the MAR provided below to answer the question.
Q2) Directions: Refer to the portion of the MAR provided below to answer the question.
Q3) Directions: Refer to the portion of the MAR provided below to answer the question.
Q4) A medicine ordered q6h would be given how many times a day? _____
A)4 B)6
C)8
D)12
Q5) A client refuses a p.o.medication and provides the nurse with a reason for refusing the medication.What should the nurse's action be?
A)Inform the client they cannot refuse a medication.
B)Report it to the nurse manager.
C)Administer the medication by an injectable route.
D)Document the refusal and inform the prescriber.
Q6) Directions: Refer to the portion of the MAR provided below to answer the question.
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Chapter 13: Reading Medication Labels
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Sample Questions
Q1) A medication label reads "Calan SR (verapamil hydrochloride)240 mg sustained release caplets." The form is:
A)caplets.
B)sustained-release caplets.
C)240 mg.
D)verapamil hydrochloride.
Q2) If a medication label reads "Ambien (zolpidem tartrate)5 mg tablets,Searle," the medication's generic name is:
A)Ambien.
B)Searle.
C)zolpidem tartrate.
D)tablets.
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Chapter 14: Dosage Calculation Using the Ratio and Proportion Method
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15 Verified Questions
15 Flashcards
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Sample Questions
Q1) Directions: Calculate the following dosage using the ratio and proportion method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Ampicillin 0.375 g IM q6h
Available: Ampicillin 250 mg per mL
Q2) Directions: Calculate the following dosage using the ratio and proportion method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Amoxil 0.5 g p.o.q6h
Available: Amoxil capsules labeled 250 mg per capsule
Q3) Directions: Calculate the following dosage using the ratio and proportion method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Thorazine 25 mg p.o.t.i.d.
Available: Thorazine syrup labeled 10 mg per 5 mL
Q4) Directions: Calculate the following dosage using the ratio and proportion method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Zofran 7 mg p.o. b.i.d.
Available: Zofran oral solution labeled 4 mg per 5 Ml
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Chapter 15: Dosage Calculation Using the Formula Method
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13 Flashcards
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Sample Questions
Q1) Directions: Calculate the following dosage using the formula method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Amoxil 0.5 g p.o.q6h
Available: Amoxil capsules labeled 250 mg per capsule
Q2) Directions: Calculate the following dosage using the formula method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Thorazine 25 mg p.o.t.i.d.
Available: Thorazine syrup labeled 10 mg per 5 mL
Q3) Directions: Calculate the following dosage using the formula method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Compazine 8 mg p.o.stat
Available: Compazine syrup labeled 5 mg per 5 mL
Q4) Directions: Calculate the following dosage using the formula method.Round mL answers to the nearest tenth unless otherwise indicated.
Order: Zofran 7 mg p.o. b.i.d.
Available: Zofran oral solution labeled 4 mg per 5 mL
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Chapter 16: Dosage Calculation Using the Dimensional Analysis Method
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12 Flashcards
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Sample Questions
Q1) Directions: Calculate the following dosage using the dimensional analysis method.Round mL answers to the nearest tenth unless otherwise indicated
Order: Amoxil 0.5 g p.o.q6h
Available: Amoxil capsules labeled 250 mg per capsule
Q2) Directions: Calculate the following dosage using the dimensional analysis method.Round mL answers to the nearest tenth unless otherwise indicated
Order: Thorazine 15 mg IM stat
Available: Thorazine 25 mg per mL
Q3) Directions: Calculate the following dosage using the dimensional analysis method.Round mL answers to the nearest tenth unless otherwise indicated
Order: Zofran 7 mg p.o. b.i.d.
Available: Zofran oral solution labeled 4 mg per 5 mL
Q4) Directions: Calculate the following dosage using the dimensional analysis method.Round mL answers to the nearest tenth unless otherwise indicated
Order: Calcijex 1.5 mcg IV daily on Mon. ,Wed. ,Fri.
Available: Calcijex 1 mcg per mL
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Page 20
Chapter 17: Oral Medications
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Sample Questions
Q1) Directions: Calculate the following dosage.Use labels where provided.Round oral liquids to the nearest tenth as indicated.
Order: Ampicillin 1 g p.o.as an initial dosage and then 500 mg p.o.q.i.d.for 7 days thereafter
Available: Ampicillin capsules labeled 500 mg
a.How many capsules will you administer for the initial dosage? _____ cap(s)
b.What is the total number of capsules needed for the subsequent dosages for 7 days? _____ cap(s)
Q2) Directions: Complete with the correct word(s)or number. The solid form of medication that contains granules that delays the release of the medication is referred to as a _______________.
Q3) Directions: Calculate the following dosage.Use labels where provided.Round oral liquids to the nearest tenth as indicated.
Order: Diazepam 4 mg via nasogastric tube t.i.d.
Available: Diazepam oral solution 5 mg per 5 mL
a.How many milliliters should the client receive per dosage? _____ mL
b.How many milligrams will the client receive per day? _____ mg
Q4) Directions: Complete with the correct word(s)or number. Enteric-coated tablets and time-release tablets should never be _______________.
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Chapter 18: Parenteral Medications
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Sample Questions
Q1) A 3-mL syringe is calibrated in which of the following increments?
A)0.01 mL
B)0.1 mL
C)0.2 mL
D)1 mL
Q2) Directions: Complete the following statements with the correct word(s)or number(s). The route that is used for diagnostic purposes is called _______________.
Q3) If the dose calculated is 0.78 mL,and a 1-mL syringe is used,how many milliliters will the nurse administer?
A)0.75 mL
B)0.78 mL
C)0.8 mL
D)0.85 mL
Q4) Directions: Complete the following statements with the correct word(s)or number(s). If a nurse calculates a dosage of 3.39 mL of medication,which size syringe should the nurse select? _____ What would be the nearest measurable dose on the syringe?
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Chapter 19: Reconstitution of Solutions
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Sample Questions
Q1) Directions: Prepare the following strength solutions.Describe your calculations. Prepare irrigant 250 mL 1/2 strength solution: ______________________________
Q2) Directions: Indicate how you would prepare each of the following using full-strength hydrogen peroxide (solute)and normal saline (solvent). 8 oz of 1/2 strength for wound care.
Q3) Directions: Indicate how you would prepare each of the following using full-strength hydrogen peroxide (solute)and normal saline (solvent).
300 mL of 3/4 strength for skeletal pin care
Q4) Directions: Prepare the following strength solutions.Describe your calculations. 800 mL of 3/4 strength Sustacal via gastrostomy over 6 hours
Q5) Directions: Indicate how you would prepare each of the following using full-strength hydrogen peroxide (solute)and normal saline (solvent). 0.24 L of 1/3 strength for wound care
Q6) Directions: Prepare the following strength solutions.Describe your calculations. 1/4 strength Ensure 8 oz p.o.q4h for 24 hours
Q7) Directions: Prepare the following strength solutions.Describe your calculations. 360 mL of 1/4 strength Ensure percutaneous endoscopic (PEG)tube over 4 hours
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Chapter 20: Insulin
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Sample Questions
Q1) Directions: Fill in the correct number or word(s). What is the difference between the calibration of units on the 1-mL insulin syringe and on the Lo-Dose syringe? ______________________________
Q2) Directions: Fill in the correct number or word(s). U-100 on the label of an insulin vial means: ______________________________.
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Chapter 21: Intravenous Solutions and Equipment
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Sample Questions
Q1) Directions: Interpret the following IV orders.
1,000 mL (1 L)D5W to infuse at a rate of 100 mL per hour
Q2) Directions: Fill in the correct number or word(s)to answer the question. An IV pump is an example of an ___________ infusion device.
Q3) Directions: Calculate the number of grams of NaCl and /or dextrose in the following solutions.
0.5 L D51/4NS ________ g dextrose ________ g NaCl
Q4) Directions: Calculate the number of grams of NaCl and /or dextrose in the following solutions.
250 mL D5NS _______ g dextrose ________ g NaCl
Q5) Directions: Calculate the number of grams of NaCl and /or dextrose in the following solutions.
500 mL 1/2 NS sodium chloride (NaCl): _____
Q6) Directions: Fill in the correct number or word(s)to answer the question. The IV line that can be used to administer medications and solutions and can be connected to a port on the main infusion is called _______________.
Q7) Directions: Calculate the number of grams of NaCl and /or dextrose in the following solutions.
5 L D10W dextrose: _______________
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Chapter 22: Intravenous Calculations
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Sample Questions
Q1) Directions: Determine the infusion time for the following IV.State time in both traditional and military time.Round minutes to the nearest whole number of minutes. 500 mL of whole blood to infuse at 130 mL/hr
a.Determine the infusion time: _____
b.The transfusion was started at 2:40 PM.When will the transfusion be completed?
Q2) Directions: Determine the infusion time for the following IV.State time in both traditional and military time.Round minutes to the nearest whole number of minutes. 250 mL 0.9% NS at 30 mL/hr
a.Determine the infusion time: _____
b.The IV was started at 7:00 PM.When will the infusion be complete? _____
Q3) Directions: Determine the infusion time for the following IV.State time in both traditional and military time.Round minutes to the nearest whole number of minutes. 60 mL of IV fluid with medication infusing at 50 macrogtt/min.Drop factor is 10 gtt/mL
Calculate the infusion time: _____
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Chapter 23: Heparin Calculations
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Sample Questions
Q1) Directions: Calculate the following hourly dosage of heparin (units/hr).
Order: 50,000 units of heparin in 1 L D5 0.9% NS to infuse at 40 mL/hr units/hr = _____
Q2) Directions: Calculate the following hourly dosage of heparin (units/hr).
Which solution of heparin is more concentrated: 1,000 units per mL or 10,000 units per mL? _____
Q3) Directions: Calculate the following hourly dosage of heparin (units/hr).
If a U for units was misread as a zero by the nurse for a heparin dose,the consequences to the client receiving the heparin could be ____________________________.
Q4) Directions: Calculate the following hourly dosage of heparin (units/hr).
Order: 25,000 units heparin IV in 250 mL 0.9% NS to infuse at 20 units/kg/hr.The client weighs 165 lb.
a.Weight in kilograms: _____
b.How many units will the client receive per hour? _____
Q5) Directions: Calculate the following hourly dosage of heparin (units/hr).
Order: Infuse heparin at 800 units/hr IV from a solution containing 40,000 units in 1,000 mL D5W.
How many milliliters will infuse per hour? _____ mL
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Chapter 24: Critical Care Calculations
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Sample Questions
Q1) Directions: Calculate the dosages as indicated. A client is receiving dopamine 800 mg in 500 mL D5W infusing at a rate of 30 mL/hr.
a.mg/hr: _____
b.mcg/min: _____
Q2) Directions: Calculate the dosages as indicated. Nitroglycerine has been ordered to titrate at 10 mcg/min to 30 mcg/min,and the rate should be increased by 5 mcg/min every 3-5 minutes for chest pain.The solution contains 50 mg nitroglycerin in 250 mL D5W.Develop a titration table in 5 mcg increments.The pump delivers in tenths of a milliliter.
Q3) Directions: Calculate the dosages as indicated.
A client is receiving procainamide 1 g in 500 mL D5W at 120 mL/hr.
a.mg/hr: _____
b.mg/min: _____
Q4) Directions: Calculate the dosages as indicated.
A client weighing 80 kg has an order for Intropin to infuse at 8 mcg/kg/min.The solution available is 800 mg Intropin in 500 mL D5W.
a.mcg/min: _____
b.mL/hr: _____
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Chapter 25: Pediatric and Adult Dosage Calculation Based on Weight
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Sample Questions
Q1) Directions: Round dosage and weight to the nearest tenth as indicated.Use labels where provided.
Phenobarbital 45 mg p.o.
b.i.d.
b.i.d.is ordered for a child with seizures weighing 35 lb.The recommended dosage is 6 to 8 mg/kg/24 hr,given every day or
a.What is the child's weight in kilograms? _____
b.What is the safe 24-hour dosage range for this child? _____
c.Is the dosage ordered safe? (Prove mathematically. )_______________ Explain your action: ______________________________
Q2) Directions: Using the West nomogram or formula when indicated,calculate the following dosages.Express answer to the nearest tenth.
The recommended dosage of Zovirax for a child who is immunosuppressed and has a varicella-zoster infection is 500 mg/m<sup>2</sup>.The child weighs 26.5 lb and is 58 inches tall.
a.What is the child's BSA? _____
b.What is the recommended dosage? _____
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Page 29