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Test and Tubes Database
ID:206 Urea
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DescriptionUrea is the final degradation product of proteins and amino acid metabolism. In protein catabolism the proteins are broken down to amino acids and deaminated. The ammonia formed in this process is synthesised to urea in the liver. This is the most important catabolic pathway for eliminating excess nitrogen in the body.
IndicationUsed to evaluate renal function. Test is frequently requested in conjunction with creatinine for the differential diagnosis of prerenal, renal and postrenal uraemia.
Additional InfoPart of U&E profile.
Concurrent Testsna
Dietary Requirementsna
Interpretation

DepartmentBiochemistry
SampleBlood
TubeSerum or Heparin
Tube Picture
Collection ConditionsUse Gold top (serum gel) tube except for Intensive care units, renal unit, transplant unit, patients on IV heparin (use Green/yellow top tube for these patients).
Min. Vol1 mL
Freq.Daily

Ref. Range (Male)2.5 - 7.8
Ref. Range (Female)2.5 - 7.8
Ref. Range (Paed) see info below
Ref. Range Notes0 - 5 wks: 0.8 - 5.5, 5 wks - 2 yrs: 1.0 - 5.5, 2 - 17 yrs: 2.5 - 6.5
Unitsmmol/L
IP Acute TAT1 hour
IP Routine TAT3 hours
GP Acute TAT- Contact Laboratory
GP Routine TAT24 hours
Turnround CommentMinimum retest interval = 12 hours

Originally edited by : MC. Review due on 06/10/2018 12:36:53. Published By Sylvia McLellan on 06/10/2017 12:36:53.