Why – and when – to check urea and electrolytes

Urea and electrolytes (U&E) are the most commonly requested tests that we send to the laboratory. In fact, U&E are so routine that it is easy to take them for granted, but they are an essential aid to the diagnosis of kidney disease. It is important for practice nurses to understand why and when U&E are ordered, and how to act on the results if kidney problems are suspected.