U&E

Alternative names, keywords

Urea and electrolytes, creatinine and electrolytes

Profile

Sodium, potassium, & creatinine

Urea is only routinely included for inpatients. For other patients urea will only be done if specifically requested.

Samples required

● Clotted blood (gold cap, 5 mL tube). Smaller tubes are available for paediatric samples.

Samples received more than 8 hours after venepuncture are unsuitable for potassium and creatinine analysis.

Test indications

Factors affecting test performance/ results

In rare cases, interference due to extremely high titres of antibodies to analyte-specific antibodies, streptavidin or ruthenium can occur.

Results should always be assessed in conjunction with the patient’s medical history, clinical examination and other findings.

Reference range

See component tests

Turnaround time

Same day (within 1h if urgent)

Enquiries

Biochemistry (Automation)