Gatford and Phillips’ Drug Calculations

10th Edition - December 16, 2021
Authors: Julie Martyn, Mathew C. Carey, John D. Gatford, Nicole M. Phillips
Language: English
Paperback ISBN:
9 7 8 - 0 - 7 0 2 0 - 8 2 5 4 - 2
eBook ISBN:
9 7 8 - 0 - 7 0 2 0 - 8 2 5 5 - 9

This bestselling pocketbook makes calculating medicine easy. Now in its tenth edition, it has been revised as a practical guide to rapid and accurate drug calculations for all he… Read more

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This bestselling pocketbook makes calculating medicine easy. Now in its tenth edition, it has been revised as a practical guide to rapid and accurate drug calculations for all health professionals who prescribe, supply and administer medication.

Gatford’s Drugs Calculations
supports the fundamental mathematical skills needed on the wards, then goes further to provide context and tips for application. With examples taken from everyday practice, readers will learn calculations for administering injections, tablets and mixtures, intravenous infusions, and safe dosages for children and the elderly.

Not only will this essential aid boost your healthcare numeracy and confidence, the skills you develop will ensure patient safety when calculating drugs for which you are responsible and accountable in future.

Included is an extensive online resource to enable you to test your knowledge.

Cover image
Title page
Table of Contents
Copyright
Preface to the Tenth Edition
Preface to the First Edition
Acknowledgements
Useful abbreviations
Formulae used in this book
1. Forms of medications for calculation and administration
1. What you need to know
2. Formulating medications
3. Solid medication forms
4. Liquid medication forms
5. Gel medication forms
6. Gas medication forms
7. Absorption, distribution and metabolism
8. Medication administration safety
2. A review of relevant calculations
1. Mathematical terms
2. Diagnostic test
3. Multiplication by 10, 100 and 1000
4. Division by 10, 100 and 1000
5. Converting units
6. Comparing measurements
7. Multiplication of decimals
8. Factors
9. Simplifying fractions I
10. Simplifying fractions II
11. Simplifying fractions III
12. Simplifying fractions IV
13. Rounding off decimal numbers
14. Fraction to a decimal I
15. Fraction to a decimal II
16. Fraction to a decimal III
17. Mixed numbers and improper fractions
18. Multiplication of fractions
19. Multiplication of a fraction by a whole number
20. 24-Hour time
24-Hour time
3. Dosage calculations for solid medications
1. Introduction
2. What you need to know
3. Calculating dosages of solid medications
4. Combinations of tablets
5. Calculations of solid oral medications involving prescriptions and medication labels
6. Case scenario
4. Dosage calculations for liquid medications
1. Introduction
2. What you need to know
3. Strength of solution according to volume
4. Estimating the volume for injection
5. Calculating volumes of dosages for injection
6. Calculating volumes of dosages for ingestion
7. Calculations for oral liquid medications involving prescriptions and medication labels
8. Calculations for injectable liquid medications involving prescriptions and medication labels
9. Measuring liquid volumes for injection using syringes
10. Case scenario
5. Dosage calculations for infused medications
1. Introduction
2. What you need to know
3. Calculating volume of an infusion
4. Calculating time for an infusion
5. Calculating rates of flow in millilitres per hour (mL/hr) given the time in hours
6. Calculating rates of flow in millilitres per hour (mL/hr) given the time in minutes
7. Calculating rates of flow in drops per minute (drops/min)
8. Calculating rates of flow for blood transfusions (drops/min)
9. Calculating finishing times of intravenous infusions
10. Calculating running times and finishing times of intravenous infusions
11. Calculating stock concentration and administration of dosages
12. Calculating kilojoules of energy
13. Case scenario
6. Paediatric dosages
1. Introduction
2. What you need to know
3. Calculating a single dose based on body weight
4. Estimating volumes for injection in paediatric patients
5. Calculating volumes for injection in paediatric patients
6. Calculating paediatric dosages for oral medications in liquid form
7. Calculating paediatric dosages of powder-form medications for injection
8. The volume of water for injection and concentration of a solution
9. Determining a Child's body surface area using a nomogram
10. Calculating paediatric dosages based on body surface area
11. Case scenario
7. Case scenario: the life of Maisy
1. One-month-old Maisy
2. Maisy aged 6 years
3. Maisy aged 12 Years
4. Maisy aged 15 years
5. Maisy aged 26 years
6. Maisy aged 42 years: pre-operative phase
7. Maisy aged 42 years: post-operative phase
8. Maisy aged 78 years
8. Answers
Chapter 2: A review of relevant calculations
Chapter 3: Dosages calculations for solid medications
Chapter 4: Dosages calculations for liquid medications
Chapter 5: dosage calculations for infused medications
Chapter 6: paediatric dosages
Chapter 7: case scenario: the life of Maisy
Index
Card insert

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Gatford and Phillips’ Drug Calculations

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Julie Martyn

Mathew C. Carey

John D. Gatford

Nicole M. Phillips