Skip to content

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Find out more here. Hide this message

Laboratory Medicine

Test Directory / Sodium


Brown clotted serum, gel barrier or lithium heparin

Common AbbreviationsSOD, Na2+
ProfileUrea and Electrolytes
Tube typeBrown clotted serum, gel barrier or lithium heparin
Clinical IndicationMeasurement is used to identify hypo or hypernatraemia. It may be measured in patients with fluid abnormalities (e.g. dehydration and oedema) or in patients with a variety of different symptoms. Monitoring of sodium levels may also be indicated in patients taking certain medications (e.g. ACE inhibitors).
Specimen TypeBlood
Sample typeSerum or plasma
Minimum Volume0.5mL If requesting more than 10 tests please send an additional brown clotted serum sample.
Special PrecautionsNo special requirements
Stability2 weeks at 2-25°C
Turnaround TimeUrgent: 2 hours Inpatient: 4 hours Outpatient/ GP: 24 hours
LaboratoryYork and Scarborough
Reference Interval133-146 mmol/L (Recommended by Pathology Harmonisation Reference Group)
LimitationsHaemolysed samples are not suitable for analysis.
Looking down a long bright hospital corridor with treatment rooms on the left and windows on the right. At the bottom of the corridor is one member of staff in a blue nursing uniform

Our Hospitals

Two female receptionists on the phone at a desk smiling


Chinese Poland

View all languages >