NephrologyTier 2Topic

Process of fluid and electrolyte status regulation

Overview

  • The kidney regulates extracellular fluid volume and osmolality through independent but coordinated mechanisms: sodium/water handling for volume, and ADH-driven water handling for osmolality
  • These systems normally maintain plasma osmolality within a very narrow range (~275-295 mOsm/kg) despite wide variation in daily fluid/salt intake

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