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HelpTest Code SOD Sodium, Plasma/Serum/Urine
Performing Laboratory
North Ottawa Community Hospital
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Specimen Type: Plasma
Container/Tube: Mint-green top (lithium heparin gel)
Specimen Volume: 1 mL
Collection Instruction:
1. Label specimen as plasma.
2. Avoid hemolysis and lipemia.
Acceptable:
Specimen Type: Serum
Container/Tube: Serum gel or red top
Specimen Volume: 1 mL
Collection Instruction:
1. Label specimen as serum.
2. Avoid hemolysis and lipemia.
Specimen Type: Urine
Container/Tube: Plain, screw-top container
Specimen Volume: Entire collection
Collection Instructions:
1. Collect a random urine specimen.
2. No preservative.
Reference Values
136-145 mmol/L
Critical values (automatic call-back):
<1 year old <125 mmol/L or >150 mmol/L
>1 year old <120 mmol/L or >160 mmol/L
Day(s) Test Set Up
Monday through Sunday
Methodology
Potentiometric
Specimen Transport Temperature
Ambient
Test Classification and CPT Coding
84295
Specimen Storage and Stability
| Specimen Type | Temperature | Time |
| Serum/Plasma/Urine | Room Temp | < 4 days |
| Refrigerated (primary) | <7 days | |
| Frozen | <6 months |