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Blood urea nitrogen
Measures waste produced in the liver and excreted by the kidneys. Most specific lab for hydration.
High levels might indicate kidney problems/ renal disease, dehydration, GI bleeding. Maybe caused by high protein diets, CHF, or strenuous exercise.
Low levels may be caused by pregnancy.
Substance produced by muscle. This test is done to diagnose kidney dysfunction.
Most specific lab for renal damage if elevated.
High level may indicate impaired kidney function, renal failure.
some medications may increase the levels. S&s: coma.
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