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A Sodium Test is a blood test that measures the amount of sodium in your blood. Sodium is an important electrolyte that helps maintain fluid balance, nerve function, and muscle activity in the body.
Doctors may recommend a Sodium Test to diagnose or monitor conditions like dehydration, kidney disease, electrolyte imbalance, adrenal gland disorders, or abnormal fluid levels in the body.
Low sodium levels (hyponatremia) may cause fatigue, headache, nausea, confusion, muscle cramps, weakness, and in severe cases, seizures or loss of consciousness.
High sodium levels (hypernatremia) can lead to excessive thirst, dry mouth, irritability, confusion, muscle twitching, and dehydration-related symptoms.
No, fasting is not required before a Sodium Test. However, your doctor may provide special instructions depending on your health condition or if additional tests are being performed.
The normal sodium level in blood is generally between 135 and 145 mEq/L. Values outside this range indicate an electrolyte imbalance or underlying medical condition.
Yes, dehydration can increase sodium levels in the blood and may affect test results. Proper hydration is important for maintaining normal sodium balance.
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| Sodium Level (mmol/L or mEq/L) | Interpretation |
| Below 135 | Low / Hyponatremia |
| 135 – 145 | Normal |
| Above 145 | High / Hypernatremia |
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