Normal saline is 0.9% sodium chloride aqueous solution, and sodium chloride is salt and neutral. Therefore, the PH value of its aqueous solution is 7.
Normal saline is a sodium chloride solution whose osmotic pressure is basically equal to that of animal or human plasma, which is often used in physiological experiments or clinic. Its osmotic pressure value is almost the same as that of normal plasma and tissue fluid, so it can be used for medical purposes such as rehydration (not reducing or increasing the sodium ion concentration in normal people) and is also often used to culture living tissues and cells in vitro. It is the concentration of the liquid environment in which human cells are located.
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It can avoid cell rupture, and the osmotic pressure is the same as that outside the cell, so it will not dehydrate or excessively absorb water, so it is used in many places where liquid is needed in various medical operations, and the concentration of liquid environment in which human cells live. In order to correct dehydration and acidosis, different liquids are often mixed in proportion in clinic.
Generally, 0.9% NaCl or 5% glucose solution is used for infusion. When you have a fever, the body loses more water, so you should replenish water and electrolytes. Only this concentration of NaCl is an isotonic solution, which has no harm to human cells.
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