Kidney Function Test Urea Creatinine. However neither creatinine nor urea are directly toxic and are just substances used to measure kidney function 15. Levels of electrolytes in the blood need to be tightly controlled since high levels potassium hyperkalaemia is a risk factor for heart attacks.
They are usually checked with another kidney function marker called bun or blood urea nitrogen. The bun to creatinine ratio generally provides more precise information about kidney function and its possible underlying cause compared with creatinine level alone. Aug 19 2019 creatinine levels are checked to assess kidney function.
Urea is an organic compound and plays a vital role in the metabolism of nitrogen containing compounds.
Urea and creatinine are both filtered by the kidneys and excreted in your urine. Urea is also a metabolic byproduct which can build up if kidney function is impaired. They are usually checked with another kidney function marker called bun or blood urea nitrogen. By comparison with urea however creatinine more closely fulfills the above criteria and for this reason is the preferred test for assessment of kidney function 3 4.