Pathology tests database

Sample and container requirements

Serum Lithium Heparin Plasma (paediatrics only)

Minimum volume required

Special requirements

None

Patient preparation

None

Sample viability

Turnaround time

This assay is run throughout the day and night. The in-lab turnaround time is normally less than 24 hours.

Reference range

Neonates (<4 weeks): 0.8 – 5.5 mmol/L Infant (4 weeks – 1 year): 1.0 – 5.5 mmol/L 1 – 16 years: 2.5 – 6.5 mmol/L Adult: 2.5 – 7.8 mmol/L (Source: Pathology Harmony Recommendations)

Clinical guidance

Urea forms part of the standard U&E (urea and electrolyte) panel in blood. Please refer to LabTestsOnlineUK to learn more about urea. https://labtestsonline.org.uk/tests/urea-test

Notes