Which of the following is the percentage of sodium chloride in a normal saline solution?

Rationale

0.90% is the percentage of sodium chloride in a normal saline solution.

A normal saline solution is defined to contain 0.9% sodium chloride (NaCl) by weight, which is commonly used in medical settings for various purposes, including hydration and electrolyte balance.

A (0.09%) YOUR ANSWER

This value is much lower than the standard concentration for normal saline. A 0.09% solution would not provide the necessary osmotic balance required for intravenous fluids, making it unsuitable for typical medical applications.

B (0.45%) YOUR ANSWER

While this concentration is closer to normal saline than 0.09%, it still falls short of the 0.9% requirement. A 0.45% saline solution is considered a hypotonic solution, which could lead to complications when used for hydration or electrolyte replenishment.

C (0.90%) CORRECT

This is the correct concentration for a normal saline solution. The 0.9% sodium chloride solution is isotonic with human blood plasma, making it safe and effective for intravenous administration and other medical uses.

D (9%) YOUR ANSWER

This concentration is significantly higher than normal saline and would be hypertonic. A 9% sodium chloride solution can cause cellular dehydration and is not suitable for general medical use as it would likely lead to adverse effects.

Conclusion

A normal saline solution is specifically defined as containing 0.9% sodium chloride, which is critical for its use in medical settings. Other concentrations, such as 0.09%, 0.45%, and 9%, do not meet the standard and can lead to complications due to their hypo- or hypertonic nature. Understanding the precise formulation of saline solutions is essential for safe and effective medical treatment.

Which of the following is the percentage of sodium chloride in a normal saline solution?

0.90% is the percentage of sodium chloride in a normal saline solution.

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