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If the solution were pure water you would die. When blood cells are exposed to pure water the increased salts in the cell cause the water to flow in and would cause the red blood cells to burst (this is called lysis). The blood itself is a little salty (which is why you rinse your eyes with saline). The IV bags are usually plain saline, sometimes they are saline mixed with a form of sugar. The sugar provides energy for the body. (it is not table sugar)

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15y ago
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13y ago

Because blood itself contains solutes. If only pure water is added it dilutes the solutes and disrupts various equilibria in the body.

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Q: In hospitals when patients get IV's why is the solution not pure water?
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