![]() The prescribed dose is 50 mg of the medication, which means that the nurse will need to measure out 5 mL of the medication using a syringe or other measuring device. Examples of milliliter dosages nurses may encounter in their practice may include:Ī medication comes in a liquid form to be taken orally with a concentration of 10 mg/mL. Milliliter dosages are 1000 times smaller than liter dosages. The rate of administration would then be calculated based on the prescribed time frame. Intravenous (IV) fluids: A common order for IV fluids is to administer 1 liter over a specific time period, such as 8 hours. Liter (L): The base metric unit of volume, equal to 1,000 millilitersĮxamples of liter dosages that nurses may encounter in their practice include: Length/distance: meter (m), centimeter (cm), millimeter (mm)Ī liter (L) is a metric unit of volume that is commonly used for measuring liquids. Mass/weight: gram (g), kilogram (kg), milligram (mg) The three types of metric system units that are commonly used to measure medications are as follows: It is a decimal-based system that is more precise compared to the apothecary and household systems, both of which may lead to errors in medication dosage if used in healthcare settings. The metric system is the standard unit of measurement used in US healthcare and is also known as The International System of Units (SI). Instead, this article will focus mainly on the metric system units of measurement. The apothecary and household systems of measurement are rarely used for nursing dosage calculations in hospital settings, though they may be used in home healthcare settings. Gallon: approximately 3.8 liters (L) or 16 cups or 8 pints or 4 quarts Quart: approximately 960 milliliters (mL) or 4 cups or 2 pints Pint: approximately 480 milliliters (mL) or 2 cups Tablespoon (tbsp): approximately 15 milliliters (mL) or 3 teaspoonsįluid ounce (fl oz): approximately 30 milliliters (mL) or 2 tablespoonsĬup: approximately 240 milliliters (mL) or 8 fluid ounces Teaspoon (tsp): approximately 5 milliliters (mL) Here are some common household units of measurement and their approximate equivalents: The household system is based on common household measurements and includes units such as teaspoons (tsp), tablespoons (tbsp), and ounces (oz). Gallon (gal): approximately 3.8 liters (L) or 4 quarts Quart (qt): approximately 946 milliliters (mL) or 2 pints Pint (pt): approximately 473 milliliters (mL) or 16 fluid ounces Pound (lb): approximately 454 grams (g) or 16 ouncesįluid Dram (fl dr): approximately 3.7 milliliters (mL)įluid Ounce (fl oz): approximately 29.6 milliliters (mL) Ounce (oz): approximately 28 grams (g) or 8 drams Grain (gr): approximately 65 milligrams (mg)ĭram (dr): approximately 4 grams (g) or 60 grains Here are some common units of measurement used in the apothecary system and their approximate equivalents in metric units: It includes units such as grains (gr), drops (gtt), and drams (dr). The apothecary system is an older system of measurement that has largely been replaced by the metric system. The three main units of measurement in nursing include the apothecary system, the household system, and the metric system.
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