Dehydration
Sodium salts (NaCl, NaHCO3) are the main inorganic salts that determine the osmotic pressure of extracellular fluid. Therefore, serum sodium concentration is the main factor that determines the level of plasma osmotic pressure. Due to the different proportions of water and sodium deficiency, different changes in plasma sodium concentration and Osmotic pressure changes. During dehydration, dehydration is often divided into three types clinically according to the level of serum sodium: isotonic dehydration, hypotonic dehydration, and hypertonic dehydration.
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