Intra-cellular Fluid Volume, = Total Body Fluid

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• Regulated by ADH → Controls Na Sodium (135 - 145) concentration in blood → Regulates Serum Osmolality (275-295)
• *Same total body water, just flow of fluid between Intra-and extra-cellular space </aside>

Definition

• 2/3 of body fluid
• Negatively charged
• Main components:
  • K Potassium (3.5-5)
  • PO4 - Phosphate (0.8-1.5 mmol/L**)**
  • Protein

Physiology

Related CC

• Hypernatremia ↑ Na (> 145)
• Hyponatremia ↓ [Na] (<135)
• Polyuria

Related Medications

• Vasopressin (AVP), Desmopressin (DDAVP)
• ADH Antagonist (”-vatan”)