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Hydration And Dehydration Status
Dehydration : a state of negative fluid balance caused by decreased intake, increased losses, or fluid shifts. Overhydration or edema : increase in extracellular fluid volume; fluid shifts from extracellular compartment to interstitial tissues: Caused by increase in capillary hydrostatic pressure or permeability. Decrease in colloid osmotic pressure. Physical inactivity. Use laboratory and clinical data to evaluate patient. Assessment of Hydration Status
Isotonic fluid loss from the extracellular space caused by: Hypovolemia
Symptoms of Hypovolemia Orthostatic Hypotension (caused by change in position). Central venous and pulmonary pressures . Increased heart rate. Rapid weight loss. Decreased urinary output. Patient cool, clammy. Decreased cardiac output.
Replace lost fluids with fluids of similar concentration. Restores blood volume and blood pressure. Usually isotonic fluid like normal saline or lactated Ringer’s solution given IV. Treatment of Hypovolemia

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