Procedures & Tests - Blood Chemistry Tests

(This procedure/test may also be known as: Blood Test)

Blood chemistry tests measure the levels of certain electrolytes, such as sodium and potassium, in the blood. Doctors typically order them to look for any sign of kidney dysfunction, diabetes, metabolic disorders and tissue damage. When only a small amount of blood is needed, the sample can sometimes be taken from a baby by sticking a heel, and from an older child by sticking a finger with a small needle. If a larger blood sample is needed, the technician drawing the blood will clean the skin, insert a needle into a vein (usually in the arm or hand), and withdraw blood.

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