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Laboratory Medicine

Test Directory / Urea

Urea

Brown clotted serum, gel barrier or orange lithium heparin

TestUrea
Common AbbreviationsURE
ProfileUrea and Electrolytes
Tube typeBrown clotted serum, gel barrier or orange lithium heparin
Clinical IndicationOften measured along with creatinine in the differential diagnosis of renal function. Elevated urea levels may be seen in kidney disease, heart failure, dehydration and following a GI bleed.
Specimen TypeBlood
Sample typeSerum or plasma
Minimum Volume0.5mL If requesting more than 10 tests please send an additional brown clotted serum sample.
Special PrecautionsNo special requirements
Stability7 days at 2-25°C
Turnaround TimeUrgent: 2 hours Inpatient: 4 hours Outpatient/ GP: 24 hours
LaboratoryYork and Scarborough
Reference Interval2.5-7.8 mmol/L (Recommended by the Pathology Harmonisation Reference Group)
LimitationsHighly lipaemic samples may exceed the reaction absorbance and are therefore unsuitable for analysis.
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Invitation to attend the Trust’s Annual Members Meeting

Trust members and the general public are invited to find out more about their local hospitals by attending the Trust’s virtual Annual Members Meeting (AMM), incorporating the Annual General Meeting (AGM), on Tuesday 26 October 2021, between 11:00am-12:30pm.