is bun and creatinine fasting
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- Bun and creatinine. Question: Recent labwork revealed an elevated BUN of 34 w/ a ref range of 5-26. Creatinine was 0.69 w/ ref range of 0.5-1.50. BUN/creatinin ratio was elevated at 49 w/ ref range of 8 to 27. This was a fasting sample (approx 12 hours w/o food or drink)....
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- 1 High BUN levels can indicate kidney dysfunction, but because BUN is also affected by protein intake and liver function, the test is usually done together with a blood creatinine, a more specific indicator of kidney function.
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Blood Urea Nitrogen A better measure is the ratio of BUN to creatinine found in your blood. Typically, the ratio of BUN to creatinine should be between 10:1 and 20:1. If it's lower or higher than that, it may mean you have a problem with your kidneys. How is this test done? The test requires a blood sample, which is drawn through a needle from a vein in your arm.
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Blood Urea Nitrogen (BUN) The remaining waste forms urine. If the creatinine and BUN tests are found to be abnormal or if someone has an underlying disease that is known to affect the kidneys, such as diabetes or high blood pressure, then creatinine and BUN tests may be used to monitor for kidney dysfunction and the effectiveness of treatment.rea is released by the liver into the blood and is carried to the kidneys, where it is filtered out of the blood and released into the urine. Since this is an ongoing process, there is usually a small but stable amount of urea nitrogen in the blood.
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Blood Urea Nitrogen Blood urea nitrogen to creatinine ratio (BUN:creatinine). A BUN test may be done with a blood creatinine test. The level of creatinine in your blood also tells how well your kidneys are working—a high creatinine level may mean your kidneys are not working properly.
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Blood Urea Nitrogen (BUN) If the creatinine and BUN tests are found to be abnormal or if someone has an underlying disease that is known to affect the kidneys, such as diabetes or high blood pressure, then creatinine and BUN tests may be used to monitor for kidney dysfunction and the effectiveness of treatment.
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- Blood urea nitrogen (BUN) is another blood test that's often done with a creatinine test. BUN is a waste product that comes from the digestive process. Healthcare providers also measure it to see how your kidneys are functioning.You may also have a test that measures the amount of creatinine in your urine.learing and filtering waste products out of your blood are important kidney functions. Creatinine is a normal waste product that builds up in your blood from using your muscles. Your body produces creatinine at a constant rate all the time, and healthy kidneys remove almost all of this creatinine.
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Fasting for Blood Tests Iron tests are used to see if iron levels in your system are too low or too high. Typical fasting time: 12 hours. Gamma-glutamyl transferase (GGT) shows the level of the GGT enzyme in your system. A high reading may indicate liver disease, bile duct problems, or alcohol abuse.
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Blood Urea Nitrogen (BUN) If the creatinine and BUN tests are found to be abnormal or if someone has an underlying disease that is known to affect the kidneys, such as diabetes or high blood pressure, then creatinine and BUN tests may be used to monitor for kidney dysfunction and the effectiveness of treatment.lood creatinine and BUN tests may also be ordered to evaluate kidney function prior to some procedures, such as a CT (computed tomography) scan, that may require the use of drugs that can damage the kidneys.
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- Both tests can indicate how well your kidneys are working. The typical ratio of BUN to creatinine in your blood is 10:1 to 20:1, according to the American Association for Clinical Chemistry. (AACC). Your physician also may use the test to aid in the diagnosis of some of the following conditions: 1  liver damage. 2  malnutrition.
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- A normal creatinine depends on muscle mass and age. In general, a normal creatine is 0.5 to 1.2 milligrams per deciliter (mg/dL). A normal BUN is 7 to 20 mg/dL. Remember that different laboratories use different testing equipment, and may have slightly different ranges for normal.
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Study Says Fasting Necessary for Creatinine Testing Healthy kidneys process and eliminate creatinine from the blood at a constant rate, so measuring creatinine levels gives a good indication of how well the kidneys are working. Levels in the blood rise when the kidneys are not functioning properly as seen in people with CKD.
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Kidney Problems Other conditions that cause BUN-to-creatinine ratio to rise are kidney disease, kidney stones, or bleeding in the intestines. Low BUN-to-creatinine can occur in pregnancy, liver disease, or a diet low in protein. The BUN-to-creatinine ratio is not a precise or reliable test, though. It may often be somewhat abnormal in healthy people. More important is the creatinine level itself; if it’s elevated, the kidneys are not working properly, and the reason should be sought out.
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BUN-to-creatinine ratio In medicine, the BUN-to-creatinine ratio is the ratio of two serum laboratory values, the blood urea nitrogen (BUN) (mg/dL) and serum creatinine (mg/dL) (Cr).
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BUN and Creatinine Levels 1 Print. 2  Email. 3  Taken together, the blood urea nitrogen (BUN) and creatinine levels can provide useful information about kidney function. 4  The BUN and creatinine levels can be affected by many things, including certain medications and various illnesses.
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- Both BUN and creatinine are filtered by the kidney and excreted in urine. For this reason, BUN and creatinine are used together to measure kidney function. If kidney function begins to decline, BUN and creatinine rise. A normal creatinine depends on muscle mass and age. In general, a normal creatine is 0.5 to 1.2 milligrams per deciliter (mg/dL). A normal BUN is 7 to 20 mg/dL.
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Medical Dictionary Blood urea nitrogen (BUN) and creatinine tests can be used together to find the BUN-to-creatinine ratio (BUN:creatinine). A BUN-to-creatinine ratio can help your doctor check for problems, such as dehydration, that may cause abnormal BUN and creatinine levels. Why It Is Done A blood urea nitrogen (BUN) test is done to: 1  See if your kidneys are working normally. 2  See if your kidney disease is getting worse. 3  See if treatment of your kidney disease is working. 4  Check for severe dehydration. Dehydration generally causes BUN levels to rise more than creatinine levels.
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- Fasting Defined. Fasting means you do not eat or drink for a specified period of time. Typically you are allowed to drink only water during the fasting period. Tea and coffee contains caffeine, which can make your test results inaccurate. For fasting labs you might also be asked not to chew gum, smoke or even exercise. Exercise, like digestion, can effect your test results.
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- A normal BUN is 7 to 20 mg/dL. Remember that different laboratories use different testing equipment, and may have slightly different ranges for normal. A small, temporary increase in either BUN or creatinine can occur during illness or dehydration; the numbers usually return to normal during recovery.
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Blood Urea Nitrogen (BUN) The ratio of BUN to creatinine is usually between 10:1 and 20:1. An increased ratio may be due to a condition that causes a decrease in the flow of blood to the kidneys, such as congestive heart failure or dehydration. It may also be seen with increased protein, from gastrointestinal bleeding, or increased protein in the diet.
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Study Says Fasting Necessary for Creatinine Testing High blood glucose levels that can occur with diabetes can damage the kidneys and prevent them from effectively filtering creatinine from the blood. Health care providers rely on creatinine test results and the eGFR to assess the degree of kidney damage in their diabetic patients.
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Blood Urea Nitrogen (BUN) What is a BUN/Creatinine ratio? Occasionally, a health practitioner will look at the ratio between a person's BUN and blood creatinine to help determine what is causing these concentrations to be higher than normal. The ratio of BUN to creatinine is usually between 10:1 and 20:1. An increased ratio may be due to a condition that causes a decrease in the flow of blood to the kidneys, such as congestive heart failure or dehydration.
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- BUN stands for blood urea nitrogen. Creatinine is a natural product of muscle breakdown that occurs at a low level in the body. Both BUN and creatinine are filtered by the kidney and excreted in urine. For this reason, BUN and creatinine are used together to measure kidney function. If kidney function begins to decline, BUN and creatinine rise.
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Blood Urea Nitrogen (BUN) the ratio of bun to creatinine is usually between 10 1 and 20 1 an increased ratio may be due to a condition that causes a decrease in the flow of blood to the kidneys such as congestive heart failure or dehydration
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- For this reason, BUN and creatinine are used together to measure kidney function. If kidney function begins to decline, BUN and creatinine rise. A normal creatinine depends on muscle mass and age. In general, a normal creatine is 0.5 to 1.2 milligrams per deciliter (mg/dL). A normal BUN is 7 to 20 mg/dL.