Pathology tests database

Sample and container requirements

Serum Lithium Heparin Plasma (paediatrics only) Plain Spot Urine

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. The test can be ordered as an urgent request.

Reference range

275 – 295 mOsmol/kg (Source: Pathology Harmony Recommendations)

Clinical guidance

Please refer to LabTestsOnlineUK to learn more about osmolality. https://labtestsonline.org.uk/tests/osmolality-osmolarity

Notes