The following are expected complete blood count results for adults. After the test, you can return to your usual activities right away. What you can expectįor a complete blood count, a member of the health care team takes a sample of blood by putting a needle into a vein in your arm, usually at the bend in your elbow. Ask your health care provider what you need to do. If your blood sample also will be used for other tests, you might need to fast for a certain amount of time before the test. A low urea-to-creatinine ratio may be caused by a diet low in protein, a severe muscle injury called rhabdomyolysis, pregnancy, cirrhosis, or syndrome of inappropriate antidiuretic hormone secretion (SIADH).If your blood sample is being tested only for a complete blood count, you can eat and drink as usual before the test.Women and children may have lower urea levels than men because of how their bodies break down protein.Drinking excessive amounts of liquid may cause overhydration and cause a low urea value.A low urea value may be caused by a diet very low in protein, malnutrition, or severe liver damage.A very high urea-to-creatinine ratio may be caused by bleeding in the digestive tract or respiratory tract. High urea-to-creatinine ratios occur with sudden (acute) kidney problems, which may be caused by shock or severe dehydration.A high urea value may be caused by a high-protein diet, Addison's disease, tissue damage (such as from severe burns), or from bleeding in the gastrointestinal tract.Be sure to tell your doctor about all the non-prescription and prescription medicines you take. Many medicines may cause a high urea level.High urea levels can also be caused by low blood flow to the kidneys caused by dehydration or heart failure. Kidney damage can be caused by diabetes or high blood pressure that directly affects the kidneys. A high urea value can mean kidney injury or disease is present.A value that isn't in the normal range may still be normal for you. Your doctor will also look at your results based on your age, health, and other factors. Your lab report should show the range that your lab uses for each test. A urea-to-creatinine ratio can help your doctor check for problems, such as dehydration, that may cause abnormal urea and creatinine levels.Įach lab has a different range for what's normal. Urea and creatinine tests can be used together to find the urea-to-creatinine ratio (urea:creatinine). 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. Urea to creatinine ratio (urea:creatinine)Ī urea test may be done with a blood creatinine test. A low urea level can occur normally in the second or third trimester of pregnancy. Liver disease or damage can lower your urea level. Heart failure, dehydration, or a diet high in protein can also make your urea level higher. If your kidneys are not able to remove urea from the blood normally, your urea level rises. Urea is made in the liver and passed out of your body in the urine.Ī urea test is done to see how well your kidneys are working. Urea is made when protein is broken down in your body. A blood urea nitrogen (BUN) or urea test measures the amount of nitrogen in your blood that comes from the waste product urea.
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