| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Sodium
MessageTest performed at York Hospital Laboratory.
Test Code
SOD
CPT Codes
84295
Preferred Specimen
0.2 mL serum collected in a serum separator tube (SST)
Other Acceptable Specimens
0.2 mL serum collected in a no additive (red-top) tube, transferred to a plastic screw-cap vial
0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube
0.2 mL plasma collected in a lithium heparin (green-top) gel separator tube
Transport Temperature
Refrigerated
Specimen Stability
Room temperature: 4 days
Refrigerated: 1 week
Frozen: 6 months
Refrigerated: 1 week
Frozen: 6 months
Methodology
Potentiometric
Setup Schedule
Daily
Report Available
Next Day
Reference Range
137-145 mmol/L
Critical Values
Critical Values
| Age | Sodium (mmol/L) |
|---|---|
| <=18 years | < 130 or > 150 |
| Adult | < 120 or > 160 |
Clinical Significance
Low sodium levels may be caused by excessive urine loss, diarrhea, Addison's disease, and renal tubular disease. High sodium levels may occur in severe dehydration, some types of brain injury, diabetic coma, and excessive intake of sodium salts.
