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Hypernatremia.

R M Hardy1

  • 1Department of Small Animal Clinical Sciences, University of Minnesota College of Veterinary Medicine, St. Paul, MN.

The Veterinary Clinics of North America. Small Animal Practice
|March 1, 1989
PubMed
Summary
This summary is machine-generated.

Hypernatremia, a dangerous electrolyte imbalance, often stems from water loss but can arise from sodium chloride gain. Prompt diagnosis and slow, careful fluid replacement are key to managing this condition and preventing severe complications.

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Area of Science:

  • Veterinary Medicine
  • Internal Medicine
  • Electrolyte Disorders

Background:

  • Hypernatremia is a critical electrolyte imbalance with potentially fatal consequences.
  • It typically arises from excessive water loss but can also result from sodium chloride retention.
  • Predisposing factors include gastrointestinal losses, environmental stress, and certain medical conditions.

Purpose of the Study:

  • To outline the causes, clinical signs, diagnosis, and treatment of hypernatremia in animals.
  • To emphasize the importance of understanding patient volume status and the etiology of hypernatremia for effective management.
  • To highlight the risks associated with rapid correction and specific considerations for salt intoxication.

Main Methods:

  • Diagnosis is confirmed by measuring serum sodium concentration, with treatment indicated for levels exceeding 170 mEq/L.

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  • Treatment involves slow intravenous administration of hypotonic fluids, such as 5% dextrose in water.
  • Fluid replacement is carefully calculated to address the water deficit over 48–72 hours.

    • Main Results:

    • Clinical signs primarily involve central nervous system dysfunction, potentially progressing to seizures and coma.
    • Slow correction is crucial to prevent cerebral edema, a dangerous complication of rapid fluid shifts.
    • In cases of salt intoxication, diuretics are necessary alongside fluid therapy to prevent pulmonary edema.

    Conclusions:

    • Hypernatremia requires prompt recognition and management based on underlying causes and patient hydration status.
    • Slow, controlled correction of hypernatremia is paramount to avoid neurological complications.
    • Appropriate treatment strategies, including diuretics when indicated, are essential for favorable outcomes.