What's Urea and Electrolytes?

Urea and electrolytes are the most commonly requested biochemistry tests. They provide essential information on renal function, principally in excretion and homoeostasis. Creatinine levels are a major factor in determining the estimated glomerular filtration rate, which is the gold standard marker of kidney health.

What is a U&E blood test for?

Urea and electrolytes (U&E)

This checks for chemicals, called electrolytes, in the blood, such as sodium (salt), potassium and magnesium. If the levels are too high or too low, this can cause abnormal heart rhythms, so it is important to adjust them if the levels aren't right.

What are urea and electrolytes NHS?

Urea and electrolytes (U&Es) are the most frequently requested biochemistry tests. They provide useful information about several aspects of health, such as the volume of blood and its pH. The most important aspect of U&Es is what they tell us about kidney functioning.