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Operational Medicine 2001
Sodium

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Sodium is the primary electrolyte within the body (90%). 

Sodium is active in:

  • Acid-base balance
  • Nerve conduction
  • Oncotic pressure balance

Sodium is excreted in the urine. Despite fairly wide ranges in dietary intake of sodium, the kidney maintains a narrow range of serum sodium levels.

Sodium levels may rise in the presence of:

  • Dehydration
  • Diabetes insipidus
  • Conn's Syndrome
  • Primary Aldosteronism

Sodium levels may fall in the presence of:

  • Vomiting
  • Diarrhea
  • Prolonged gastric suction
  • Edema
  • Ascites
  • Excessive hydration
  • Severe burns
  • Malnutrition
  • Diabetic ketoacidosis
  • Diuretics

Normal Values*

Men 135-138 mEq/L
Women 136-145 mEq/L
Pregnancy 130-140 mEq/L

*These are general values taken from a variety of sources. The actual normal values may vary from lab to lab and from one type of testing protocol to another.

Approved for public release; Distribution is unlimited.

The listing of any non-Federal product in this CD is not an endorsement of the product itself, but simply an acknowledgement of the source. 

Operational Medicine 2001

Health Care in Military Settings

Bureau of Medicine and Surgery
Department of the Navy
2300 E Street NW
Washington, D.C
20372-5300

Operational Medicine
 Health Care in Military Settings
CAPT Michael John Hughey, MC, USNR
NAVMED P-5139
  January 1, 2001

 United States Special Operations Command
7701 Tampa Point Blvd.
MacDill AFB, Florida
33621-5323

*This web version is provided by The Brookside Associates Medical Education Division.  It contains original contents from the official US Navy NAVMED P-5139, but has been reformatted for web access and includes advertising and links that were not present in the original version. This web version has not been approved by the Department of the Navy or the Department of Defense. The presence of any advertising on these pages does not constitute an endorsement of that product or service by either the US Department of Defense or the Brookside Associates. The Brookside Associates is a private organization, not affiliated with the United States Department of Defense.

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