Kidney Function Test Serum Urea. If you have suspected low body water content dehydration when the urea level increases. Kidney function tests usually require a 24 hour urine sample and a blood test.
As part of a general health assessment. Creatinine is a waste product from the metabolism in our body. However certain important parameters are common.
A 24 hour urine sample is a creatinine clearance test.
It is also used to check for severe dehydration. To understand why a urea and electrolytes blood test is important it is best to know the basics of kidney function and what this test is all about. The blood urea nitrogen test which is also called a bun or serum bun test measures how much of the waste product you have in your blood. A 24 hour urine sample is a creatinine clearance test.