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Calculating Drug Dosages: A Patient-Safe Approach to Nursing and Math by Castillo
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2nd Edition
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,Table of Contents: v v
I. Safety in Medication Administration
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Chapter 1. Safety in Medication Administration
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Chapter 2. The Drug Labelv v v v
II. Systems of Measurement
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Chapter 3. The Metric System
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Chapter 4. The Household System
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III. Methods of Calculation
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Chapter 5. Linear Ratio and Proportion
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Chapter 6. Fractional Ratio and Proportion
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Chapter 7. Dimensional Analysis
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Chapter 8. Formula Methodv v v
IV. Administration of Medications
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Chapter 9. Calculating Oral Medication Doses
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Chapter 10. Syringes and Needles
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Chapter 11. Calculating Parenteral Medication Dosages
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Chapter 12. Preparing Powdered Parenteral Medications
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Chapter 13. Administration of Insulin
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V. IV Therapy and Administration of Intravenous Medications
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Chapter 14. Intravenous Infusion and Infusion Rates
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Chapter 15. Calculating Infusion and Completion Time
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Chapter 16. Administering IV Push Medications
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VI. Verifying Safe Dose and Critical Care Calculations
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Chapter 17. Verifying Safe Dose
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Chapter 18. Titration of Intravenous Medications
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VII. Intake and Output
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Chapter 19. Calculating Intake and Output
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Chapter 20. Calculating Parenteral Intake
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VIII. Dosages for Pediatric and Older Adult Populations
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Chapter 21. Considerations for the Pediatric Patient
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Chapter 22. Considerations for the Older Adult
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,Chapter 1: Safety in Medication Administration
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Castillo: Calculating Drug Dosages: A Patient-Safe Approach to Nursing and Math 2nd Edition
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MULTIPLE CHOICE v
1. The following medication order is in the patient’s medication administration record (MAR):
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methylPREDnisolone 40 mg PO daily at 0900. v v v v v v
After reading the order, the nurse correctly determines:
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A “PO” is an inappropriate abbreviation. v v v v
B the medication order is written correctly. v v v v v
C 40 mg should be written as 40mg. v v v v v v
D tall man lettering indicates that the drug is a narcotic. v v v v v v v v v
ANS: B v
Feedback
The medication order has all the required components (drug name, dose, route, and
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frequency of administration) for a drug order. “PO” is an appropriate abbreviation; 40
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mg is written correctly with a space between the dose and the unit of
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measurement. Tall man lettering is used to distinguish the drug from another drug with v v v v v v v v v v v v v
a similar name.
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2. Which of the following accurately describes the “Boxed Warning” found on a drug label?
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A It is primarily is used to identify the safe dose for the patient.
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B It is commonly found on all drug labels. v v v v v v v
C It identifies serious potential risks and side effects related to drug use.
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D It protects the patient by providing information to decrease side effects.
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ANS: C v
Feedback
A drug label with a boxed warning provides information to healthcare professionals and
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patients regarding the serious risks and side effects related to the drug. The Boxed
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Warning is not the primary source for identifying the patient’s drug dosage.
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The warning is found on specific prescription medications and does not provide
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information to reduce or decrease side effects.
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3. When practicing safety in the administration of medication, for which of the following
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medication orders should a nurse seek clarification before the administration of the
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medication?
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, A Regular insulin 5 u subcut now. v v v v v
B Enoxaparin 80 mg subcut every 12 hours. v v v v v v
C Benadryl 50 mg PO PRN every 6 hr for itching. v v v v v v v v v
D Ondansetron 4 mg IVP stat. v v v v
ANS: A v
Feedback
The “u” should never be used in a medication order; rather, for safety, the word
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“units” should be spelled out. The other answer options contain the required components
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needed to safely carry out the medication order.
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4. A nurse is reviewing a drug label with a drug name written with tall man lettering. Which
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statements shows the nurse has a correct understanding of tall man lettering on a drug label?
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A “The tall man lettering means this is a high alert drug.” v v v v v v v v v v
B “The tall man lettering helps me distinguish this drug with other drugs that v v v v v v v v v v v v
have similar names.” v v
C “The tall man lettering means that this drug must have a Boxed Warning.” v v v v v v v v v v v v
D “The tall man lettering helps me quickly identify that this drug is an injectable
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drug.” v
ANS: B v
Feedback
Tall man lettering highlights a portion of the drug name to help distinguish from
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similar drug names. It is not used to identifyhigh alert drugs, highlight a boxed warning, or
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identify injectable drugs.
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5. The following medication orders are found in the patient’s MAR:
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Metformin HCl 500 mg PO daily at 0900. Hydrochlorothiazide v v v v v v v v
25 mg PO every 12 hr at 0900 and 2100. Digoxin .25 mg PO daily
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at 0900.
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In reading the medication orders for the 0700–1500 shift, the nurse determines that which of the
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following is the priority nursing intervention?
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A Clarify the metformin HCl order. v v v v
B Clarify the hydrochlorothiazide order. v v v
C Clarify the digoxin order. v v v
D Prepare to administer the 0900 medications. v v v v v
ANS: C v
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