Saline water has plastic bottles with glass bottles, but whether plastic bottles or glass bottles have to open the pull spring, you just pull the pull spring can be opened, you can also use the corkscrew to open the open stored in the refrigerator can be saved for 24 hours, this kind of saline water usually in the refrigerator in a cold environment to save, otherwise easy to breed bacteria, physiological saline is a very good The saline is a good petri dish for bacteria.
Saline water, also known as sterile saline, refers to physiological experiments or clinical commonly used osmotic pressure and the osmotic pressure of animal or human plasma is basically equal to the sodium chloride solution.
Concentration: 0.67 to 0.70% for amphibians, 0.85 to 0.9% for mammals and humans. The concentration of sodium chloride injection that people usually use for IV is 0.9%, which can be used as saline. Its osmotic pressure is similar to that of human blood, and the content of sodium is also similar to that of plasma, but the content of chloride ions is significantly higher than that of chloride ions in plasma.
Saline is therefore only physiologically appropriate and is used to supply electrolytes and maintain fluid tone. It can also be used externally, such as when cleaning wounds or changing medications.
Saline role:
Can avoid cell rupture, its osmotic pressure and the same as the extracellular, so it will not let the cell dehydration or excessive water absorption, so a variety of medical operations in the need for liquids in a lot of places to use it, the concentration of the liquid environment in which the body's cells live. In order to correct dehydration, acidosis, clinical often different liquids in proportion to the proportion of a mixture of liquid application.
Why can't a single saline or 5%, 10% GS fluid be used to correct dehydration, acidosis? This is because severe infantile diarrhea, in addition to the loss of sodium bicarbonate and metabolic acidosis, there are nutritional disorders ketosis and a large number of electrolyte and water loss.
So there is a need for mixtures that both replenish electrolytes, correct acidosis, overcome ketosis, and hydrate and calorie replacements. Saline or 5% to 10% dextrose solution alone will not meet these pathophysiologic requirements.
The above reference? Baidu encyclopedia-saline