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liter

A metric unit of volume equal to 1,000 milliliters, a little more than a US quart.

LEE-ter noun

What it means

The basic metric unit for measuring liquids. IV fluids often come in 1-liter bags, oxygen flow is set in liters per minute (L/min), and some lab values are given per liter, such as mEq/L or mmol/L. One liter of fluid weighs about 1 kilogram, so a fast weight gain of 1 kg often means about 1 liter of fluid retained.

In a chart

"Oxygen at 2 L/min by nasal cannula; 1 L normal saline infusing at 125 mL/hr."

Remember it

1 liter of water weighs 1 kilogram.

At a glance

AbbreviationsL (use a capital L so it is not mistaken for the number 1)
Spanishlitro
Also writtenliters, litre, litres

Related terms

oxygen

A gas in the air that every cell needs, also given as a medicine at higher amounts than room air.

intake and output

The measured record of all fluids a client takes in and all fluids that leave the body over a set time.

infusion

The slow delivery of a fluid or drug into the body, usually into a vein, over a period of time.

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