Electrolytes- Normal Values

Enough with fluid, let’s move on to electrolytes!

First, I’m just going to give you a list of common electrolytes and their normal values.

Sodium (Na+)                 135-145 mEq/L

Potassium (K+)               3.5-5.0 mEq/L

Calcium (Ca++)               9-11 mg/dL

Magnesium (Mg++)        1.5-2.5 mEq/L

Phosphate (PO4-)            1.2-3 mEq/L

Chloride (Cl-)                  100-110 mEq/L

Albumin                          3.4-4.8 g/dL

Remember these!

As we discussed earlier, electrolytes can affect the amount of fluid in the intracellular and extracellular compartments.  Each compartment contains different amounts of each electrolyte, normally.  Let’s go over those.

Intracellular: potassium, magnesium, phosphate, and a large amount of protein (albumin).

Extracellular (intravascular): sodium, a small amount of potassium and magnesium, chloride, bicarbonate, and a small amount of protein.


McCarthy, M. (2011). Electrolyte imbalances [PowerPoint Slides].

McCarthy, M. & Olsen, K. (2011). Clients with fluid imbalances [PowerPoint Slides].


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