Questions and Answers
What is the Household System?
The liquid household units of measurement consisting of utensils commonly found in the home.
How many teaspoons are in 1 tablespoon?
What is the metric equivalent of 1 ounce?
How many centimeters are in 1 inch?
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The nurse has used the appropriate abbreviation for ounces when writing 2 ozs.
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If the nurse prepares 2 tablespoons, this is correct for a medication order of 1 ounce.
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1 kilogram is the same as 2.2 pounds.
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The statement '1 inch is 2.54 cm' is correct.
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1 teaspoon is equivalent to ___ mL.
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1 tablespoon is equivalent to ___ mL.
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1 ounce is equivalent to ___ mL.
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Which of the following is an example of a standard guideline when writing household abbreviations?
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Study Notes
The Household System
- Common liquid household measurement units include tablespoon (tbs), teaspoon (tsp), ounce (oz), drops (gtt), glass, and cup.
- Tablespoon is often abbreviated as "T" while teaspoon can also be written as "t."
Conversion of the Household System to Metric
- 1 tablespoon equals 3 teaspoons or 15 mL.
- 1 teaspoon equals 5 mL.
- 1 ounce equals 6 teaspoons or 2 tablespoons, equating to 30 mL.
- A glass can refer to 6 oz (180 mL) or 8 oz (240 mL).
- A cup commonly refers to either 6 oz (180 mL) or 8 oz (240 mL).
Other Common Units of Measurement
- 2.2 pounds (lb) is equivalent to 1 kilogram (kg).
- 1 inch (in) equals 2.54 centimeters (cm).
Household System Notations
- Abbreviations should be singular: "oz" for ounces, "lb" for pounds, "tsp" for teaspoons, and "tbs" for tablespoons.
- Consistency in notation enhances clarity and safety when communicating measurements.
Working with Household Units of Measurement
- Household units are beneficial for solving drug dosage calculations.
- Example: For administering 2 tablespoons of medicine, conversion practices would determine how many ounces are needed (2 tbsp = 1 oz).
Key Conversions to Remember
- 1 teaspoon (tsp) = 5 mL
- 1 tablespoon (tbsp) = 15 mL
- 1 ounce (oz) = 30 mL
Measurement Problems
- Tablespoon: 3 tsp = 15 mL
- Teaspoon: None specified but equals 5 mL
- Ounce: 6 tsp or 2 tbsp = 30 mL
Evaluating Statements
- Statements regarding medication records and conversions:
- The notation "2 ozs" is incorrect, as proper abbreviation is "oz."
- Administering 15 mL for a 1 tsp order is incorrect; 1 tsp equals 5 mL.
- Preparing 2 tbsp for a 1 oz order is correct (2 tbsp = 1 oz).
- 2.2 kg is incorrect as it equals approximately 4.85 lb, not 1 lb.
- Notation of a 1-inch scar as 2.54 cm is correct.
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Description
Test your knowledge of the Household System with these flashcards. This chapter covers liquid measurement units commonly used in households and their metric conversions. Brush up on tablespoons, teaspoons, ounces, and more to ensure you're measuring correctly in the kitchen.
