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What are the actual and desired effects of Normal Saline?

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Rajive Goel 18 Aug 2011

Action of Normal saline

Normal Saline is a sterile, nonpyrogenic solution for fluid and electrolyte replenishment. It contains no antimicrobial agents. The pH is 5.0 (4.5 to 7.0).
It contains 9 g/L Sodium Chloride with an osmolarity of 308 mOsmol/L. It contains 154 mEq/L Sodium and Chloride.

Indications of Normal Saline

It is indicated as a source of water and electrolytes. In general, intravenous lines should not be started unless the patient currently, or may soon need either fluid replenishment or medication administration. If used to replenish fluids, a large bore IV (18G or more) should be started, hung with a 1000 mL bag of saline.

NS is used frequently in intravenous drips (IVs) for patients who cannot take fluids orally and have developed or are in danger of developing dehydration or hypovolemia. NS is typically the first fluid used when hypovolemia is severe enough to threaten the adequacy of blood circulation, and has long been believed to be the safest fluid to give quickly in large volumes.

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