# Math for Nurses

## How to Use This Book

This book is designed for two purposes:

• To serve as a quick reference when reinforcement of learning is required.

## The best way to use this pocket guide is to:

• Read the rules and examples.

• Follow the steps for solving the problems.

• Work the practice problems.

• Write down your answers and notes in the margin so that you have a quick reference when you need to review.

# Schizophrenia: Causes, Diagnosis, Treatment

This pocket guide is divided into three units to facilitate quick access to specific information needed to administer drugs. The preassessment test should be completed before beginning. Unit 1 presents a review of basic math. Chapters 2 and 3 cover common fractions and decimals. Chapter 4 shows how to set up a ratio and proportion and solve for x, using a colon or fraction format. Drug-related word problems are used as contemporary examples. This unit information is essential, forming a foundation for understanding the complex dosage calculations presented in Unit 3.

Unit 2 explains measurement systems. The metric system, the apothecary system, and household units of measurement are given in Chapter 5. Emphasis on the apothecary system has been limited because of the need to minimize use of the system. Chapter 6 presents approximate system equivalents and shows how to convert from one unit of measurement to another. Some of these system equivalents are duplicated on the insert card, to provide quick and easy access when calculating drug dosage problems.

Unit 3, Dosage Calculations, is the most comprehensive and detailed section of this pocket guide. The unit begins with a detailed description of how to read and interpret medication labels in Chapter 7. Sample dosage questions specific to a drug label are used as examples.Chapters 8 and 9 cover oral and parenteral dosage calculations. Ratio and proportion and the Formula Method are used for every problem. Dimensional analysis, presented in detail in Chapter 8, is also incorporated into every drug calculation. The intravenous therapy content has been expanded in Chapter 10. Critical care applications have also been expanded in Chapter 11. The last four chapters incorporate intravenous insulin (Chapter 12), weight-based heparin (Chapter 13), intravenous (IV) push medications for children (Chapter 14), and expanded examples of drug reconstitution (Chapter 15). Throughout this unit, the problem-solving methodology is presented in a simple, easy-to-follow manner. A step-by-step approach is used, which will guide the reader through each set of examples. Enrichment information can be found in the appendices.