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What is Sodium Deficiency?

Sodium deficiency, also known as hyponatraemia, indicates reduced levels of sodium in the blood compared to the normal. It occurs when the sodium levels are lower than 135-145 milliequivalents/litre. Sodium is one of the major and essential electrolytes of the extracellular fluid and helps in the maintenance of the fluid-electrolyte balance.

What are the main signs and symptoms?

Symptoms become less evident when sodium deficiency is mild. As the severity of the condition increases, the following are noted

What are the main causes?

It is found that large amounts of water in the body decrease sodium levels. Low levels of sodium may be attributed to the loss of either sodium alone or with water from the body.

Some other reasons include

  • Inadequate functioning of the kidneys
  • Fluid build-up in the body
  • Use of medications that cause sodium loss
  • Depression or pain medications that increase urine output
  • Excessive vomiting and loose stools
  • Increased thirst

How is it diagnosed and treated?

Your physician may order certain tests to observe the levels of sodium in body fluids. Physical examination will be carried out as an initial assessment. Symptoms may be questioned to rule out other conditions. Body fluids, such as blood and urine, will be analysed for the levels of sodium. The tests given below may be performed

  • Serum sodium
  • Osmolality test
  • Sodium in urine
  • Urine osmolality

Usually, treatment is given as per the cause and severity of the condition. The main treatment approaches include

  • Intravenous fluids
  • Medicines for symptomatic relief
  • Reduction in water consumption

There are some drugs that increase sodium levels, but caution must be taken while using them. Other methods involve drinking electrolytes to correct sodium and salt levels. If there is kidney failure, dialysis may be beneficial to remove excess water.

Sodium deficiency may be corrected and is not a chronic condition, provided your vital organs are not compromised.

  1. Medicines for Sodium deficiency
  2. Doctors for Sodium deficiency
Dr. Tanmay Bharani

Dr. Tanmay Bharani

Endocrinology
15 Years of Experience

Dr. Sunil Kumar Mishra

Dr. Sunil Kumar Mishra

Endocrinology
23 Years of Experience

Dr. Parjeet Kaur

Dr. Parjeet Kaur

Endocrinology
19 Years of Experience

Dr. M Shafi Kuchay

Dr. M Shafi Kuchay

Endocrinology
13 Years of Experience

References

  1. MedlinePlus Medical Encyclopedia: US National Library of Medicine; Low sodium level
  2. Michael M. Braun et al. Diagnosis and Management of Sodium Disorders: Hyponatremia and Hypernatremia. Am Fam Physician. 2015 Mar 1;91(5):299-307. American Academy of Family Physicians.
  3. Oregon State University. [Internet] Corvallis, Oregon; Sodium (Chloride)
  4. National Kidney Foundation [Internet] New York; Hyponatremia
  5. Harvard School of Public Health. The Nutrition Source. The President and Fellows of Harvard College [Internet]
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