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Blood Urea Nitrogen (BUN) Test

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A description of the blood urea nitrogen (BUN) test - what it tests for, when you should get one, and how to interpret the results.
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Creatinine Test

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Creatinine tests can help assess kidney function. Creatinine levels can be measured through blood or urine.
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Renal Panel Test

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What is a renal function panel? The renal panel is a blood test that helps assess kidney health. Learn more about the components of a renal panel and how the test is taken and interpreted.
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Osmolality and Osmolal Gap

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Osmolality measures the amount of dissolved substances (e.g., sodium, potassium) in blood and urine. An osmolality test and calculated osmolal gap help determine if someone has ingested a toxin or has a water imbalance.
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Editorial Policy

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The mission of Testing.com is to provide a comprehensive, accurate, dynamic, and up-to-date website to inform the public about laboratory testing. The scientific content is developed and updated in accordance with established editorial policies.
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Acidosis and Alkalosis

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The body usually maintains its acid-base balance, but sometimes things go wrong. Acidosis is when body fluids are too acidic, and alkalosis occurs when body fluids are too alkaline.
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