Blood urea test is used to evaluate liver and kidney function. So when is this test indicated and what does high blood urea mean?

Quantitative blood urea and urine urea tests are important tests, often prescribed to diagnose diseases. There are many ways to measure blood urea, each method can give different results. Therefore, when diagnosing a disease, it is necessary to compare the test results with the machine's index, not compare the results of two different machines.