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Kidney (Renal) Blood Tests
Kidney blood tests are used to assess the overall health of the kidneys and how well they are functioning. Creatinine (Creat): This is a waste product released by muscles that is removed from the body by the kidneys through urine. Urea: Another waste product filtered through the kidneys and excreted in urine. Estimated Glomerular Filtration Rate (eGFR): This value provides an estimate of how well the kidneys are working to filter out waste products such as creatinine and urea. Kidney blood tests may also measure the levels of certain chemicals and minerals in the blood, such as sodium, potassium, calcium, phosphate, and magnesium. Abnormal levels of these substances can occur for various reasons, one of which is reduced kidney function. Since RLT can affect your kidneys' ability to function, it is important to check kidney health before any decision is made regarding RLT. If there are concerns about how well your kidneys are working—or how RLT might affect their function after treatment—such as a low eGFR in your kidney blood tests, you may need to undergo a nuclear medicine test called a GFR test.
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