![]() The combination of blood and urine samples can be used to evaluate a creatine clearance-how effectively your kidneys filter small molecules, such as creatinine, from your blood. Sometimes individuals are asked to provide a 24-hour urine sample for further assessment.Other conditions, such as high blood pressure or diabetes, can also cause elevated creatinine levels. Increased blood creatinine levels may indicate an increase in lupus involvement of the kidney. Creatinine levels are measured by taking a sample of blood from your vein then, the concentration of creatinine in your blood is compared to a standard amount for your age and sex. Creatinine is formed at a constant rate in the body and excreted by the kidneys, so by evaluating the amount of creatinine in your blood, your doctor can determine how efficiently your kidneys are working. Creatinine: Creatinine is produced by your muscles as they breakdown creatine, a substance involved in muscle contraction.The creatinine blood test and blood urea nitrogen (BUN) test are used to assess kidney function in people with lupus kidney disease (nephritis). Your doctor will counsel you regarding the results of your personal blood work and laboratory tests. The information below is meant to provide an overview of these tests. Usually, it consists of about 7-25 tests. A blood chemistry panel is another common test used to evaluate a variety of components. Gainesville (FL): University of Florida Health c2021. UF Health: University of Florida Health. ![]() Health Encyclopedia: Total Protein and A/G Ratio. Rochester (NY): University of Rochester Medical Center c2021. University of Rochester Medical Center.Quest Diagnostics Incorporated c2000–2019. Department of Health and Human Services Blood Tests. National Heart, Lung, and Blood Institute.Total Protein, Albumin-Globulin (A/G) Ratio. Total Serum Protein Test: Why It Is Done. Hartford HealthCare: The Hospital of Central Connecticut.Total Serum Protein with Albumin/Globulin Ratio 2013 Sep 7. Diagnosing Liver Disease - Liver Biopsy and Liver Function Tests. West Orange (NJ): American Liver Foundation c2021. Learn more about laboratory tests, references ranges, understanding results. If you have questions about your results, talk to your health care provider. If your A/G ratio was high, it may be caused by: If your A/G ratio was low, it may be caused by: ![]()
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