Which of the following is true of dehydration?

It refers to an extracellular fluid volume deficit.
Unmatched excessive output can lead to dehydration.


• Dehydration refers to an extracellular fluid volume deficit

• Dehydration is a common and serious fluid imbalance that leads to hypovolemia

• Mild fluid loss is characterized with a loss of 1 to 2L of water or 2% of body weight

• Fluid loss of 3-to-5 L of water or 5% of body weight is considered moderate dehydration

• The thirst mechanism is usually triggered by low blood pressure or fluid volume depletion as small as 0.5%

• Impaired thirst mechanism can also decrease fluid intake

• Excessive fluid output without a balancing input can lead to dehydration

• Dehydration can lead to low tissue perfusion - which is why you may note "skin tenting"

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