Urea and Electrolytes (U&E)

The 5 tests in this panel

What each one measures and the range labs usually print for adults. Ranges differ a little between labs, so the range on your own report is the one your result is judged against.

• Sodium

  Sodium is the main salt in your blood. This test shows how well your body balances water and salt.

  1+

  135–145 mmol/L

• Potassium

  Potassium is a mineral that helps your nerves, muscles and heart work. This test shows how much is in your blood.

  1+

  3.5–5.2 mmol/L

• Urea

  Urea is the main waste product from breaking down protein. Your kidneys clear it from the blood.

  16+

  2.5–7.8 mmol/L

  Men, 18–29

  3–7.5 mmol/L

  Men, 30–49

  3–8 mmol/L

  Men, 50–59

  3.5–8.5 mmol/L

• Creatinine

  Creatinine is a muscle waste product that your kidneys filter out, so the level in your blood is one of the main tools for checking kidney function.

  Men, 15+

  0.74–1.35 mg/dL

  Women, 16+

  0.59–1.04 mg/dL

• eGFR (Creatinine-based)

  An estimate of how well your kidneys filter blood, worked out from your creatinine, age and sex.

  18+

  60 and above mL/min/1.73 m²