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Alternative names, keywords |
Direct bilirubin |
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Samples required |
● Clotted blood (gold cap, 5 mL tube). Smaller tubes are available for paediatric samples. Avoid haemolysis. |
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Test indications |
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Factors affecting test performance/ results |
Haemolysis may invalidate result. In certain cases specimens may give a direct bilirubin result slightly greater than the total bilirubin result. This is observed in patient samples when nearly all the reacting bilirubin is in the direct form. Phenylbutazone causes artificially low bilirubin results. Samples containing indocyanine green must not be measured. In very rare cases, gammopathy, in particular type IgM (Waldenström’s macroglobulinemia), may cause unreliable results. Results should always be assessed in conjunction with the patient’s medical history, clinical examination and other findings. |
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Reference range |
Neonates: < 10 µmol/L* *Limit cited in the literature, although not confirmed with kit manufacturer's data. |
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Turnaround time |
Same day (within 1h if urgent) |
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Enquiries |
Biochemistry (Automation) |