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[Hormonal dysnatremia].

P Karaca1, R Desailloud1

  • 1Service d'endocrinologie, Maladies métaboliques et nutrition, CHU d'Amiens, place Victor-Pauchet, 80054 Amiens, France.

Annales D'Endocrinologie
|December 21, 2013
PubMed
Summary
This summary is machine-generated.

Antidiuretic hormone (ADH) disorders cause dysnatremia, leading to hypernatremia in central or nephrogenic diabetes insipidus (DI) and hyponatremia in syndrome of inappropriate ADH secretion (SIADH). Differentiating SIADH from cerebral salt wasting is crucial for treatment.

Keywords:
AVPDiabetes insipidusDiabète insipideHyponatremiaHyponatrémieSIADSIADH

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Area of Science:

  • Endocrinology
  • Nephrology
  • Internal Medicine

Background:

  • Disorders in antidiuretic hormone (ADH) production or function lead to dysnatremia.
  • Central diabetes insipidus (DI) results from absent ADH production, causing hypernatremia.
  • Nephrogenic DI occurs when ADH is present but receptors are altered, presenting in acquired or hereditary forms.

Purpose of the Study:

  • To differentiate causes of dysnatremia related to ADH.
  • To distinguish between SIADH and cerebral salt wasting (CSW) syndrome.
  • To highlight treatment strategies for hyponatremia and hypernatremia.

Main Methods:

  • Distinguishing central DI from nephrogenic DI based on arginine vasopressin (AVP) levels and desmopressin response.
  • Diagnosing SIADH as a diagnosis of exclusion after ruling out corticotropin deficiency and hypothyroidism.
  • Considering CSW syndrome in brain injury cases for appropriate saline treatment.

Main Results:

  • Central DI presents with hypernatremia due to lack of ADH production.
  • Nephrogenic DI shows a negative desmopressin response.
  • SIADH is the most common cause of euvolemic hypoosmolar hyponatremia.
  • 10% of SIADH cases are actually SIAD (syndrome of inappropriate antidiuresis).

Conclusions:

  • Accurate diagnosis of ADH-related disorders is essential for effective treatment.
  • Distinguishing SIADH from CSW is critical as treatments differ (hypertonic vs. isotonic saline).
  • Therapeutic options for SIADH include fluid restriction, demeclocycline, or vaptans.