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Blood Sciences

Blood Test Information

Direct Bilirubin
(a.k.a Conjugated Bilirubin)
minimum sample volume required ~ 5ml

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Tube type: SST

Reference range
<7 (or <25% of total Bilirubin in unconjugated hyperbilirubinaemia)


Linked to
Total bilirubin (for split measurements)

Turnaround Time
1 day

Department: Biochemistry

Clinical Application
Investigation of jaundice; conjugated (direct) bilirubin is raised in hepatic and post-hepatic types. In prehepatic jaundice or hyperbilirubinaemia (eg. Gilbert's, intra-vascular haemolysis) the concentration of direct bilirubin is <25% of total bilirubin.

Please note: this test is not currently accredited under UKAS ISO15189 standards


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