Sodium and Potassium, Whole Blood
Test Codes
EPIC: LAB5365, NAKW
Department
Chemistry
Instructions
Sodium and Potassium, Whole Blood should ONLY be collected at the Dearborn, Grosse Pointe, Royal Oak, Taylor, Trenton, Troy, or Wayne Hospital Campuses. Specimens should not be collected at any other Beaumont Laboratory drawsite, nursing home, or Outreach office.
Specimen Collection Criteria
Collect: One Dark Green-top Lithium Heparin tube. (Minimum Whole Blood: 1.0 mL)
Transport specimen STAT to the Laboratory after collection.
Rejection Criteria
Specimen in which significant delays occur before arrival in the Laboratory (greater than 2 hours).
Inpatient Specimen Preparation
Transport the specimen STAT to the STAT Laboratory (Royal Oak) or Chemistry Laboratory (Troy).
In-Lab Processing
Immediately analyze the whole blood specimen upon receipt in the Laboratory.
Storage
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): 2 hours
Refrigerated (2-8°C or 36-46°F): Unacceptable
Frozen (-20°C/-4°F or below): Unacceptable
Specimen Storage in Department Prior to Disposal:
Refrigerated (2-8°C or 36-46°F): 7 days
Laboratory
Dearborn Chemistry Laboratory
Grosse Pointe Chemistry Laboratory
Royal Oak STAT Laboratory
Taylor Chemistry Laboratory
Trenton Chemistry Laboratory
Troy Chemistry Laboratory
Wayne Chemistry Laboratory
Performed
Sunday – Saturday, 24 hours a day.
Results available within 30 minutes of receipt in the Laboratory.
Reference Range
Sodium
Adult range: 135-145 mmol/L.
Age related reference range:
| Age |
Range (mmol/L) |
| 0 - 1 day |
126-166 |
| 2 - 29 days |
134-144 |
| 30 days - 1 year |
139-146 |
| Greater than 1 year - 12 years |
138-145 |
| 13 years - adult |
135-145 |
Potassium
Adult range: 3.5-5.2 mmol/L.
Age related reference range:
| Age |
Range (mmol/L) |
| 0 - 1 day |
5.0-7.5 |
| 2 days - 3 months |
4.0-6.2 |
| 4 months - adult |
3.5-5.2 |
Test Methodology
Potentiometric.
Interpretation
See Sodium and Potassium assays.
Clinical Utility
This assay is appropriate when rapid turnaround time is important for patient management.
CPT Codes
84132, 84295.
LOINC: Potassium 2823-3, Potassium Whole Blood 6298-4
Contacts
Chemistry Laboratory – GP
313-473-1807
Name: Chemistry Laboratory – GP
Location:
Phone: 313-473-1807
Chemistry Laboratory – TRN
734-671-3165
Name: Chemistry Laboratory – TRN
Location:
Phone: 734-671-3165
Chemistry Laboratory – DBN
313-596-2196
Name: Chemistry Laboratory – DBN
Location:
Phone: 313-596-2196
Chemistry Laboratory – TYL
313-295-5360
Name: Chemistry Laboratory – TYL
Location:
Phone: 313-295-5360
Main Laboratory –WYN
734-467-4274
Name: Main Laboratory –WYN
Location:
Phone: 734-467-4274
STAT Laboratory – RO
248-898-0325
Name: STAT Laboratory – RO
Location:
Phone: 248-898-0325
Chemistry Laboratory – TR
248-964-8070
Name: Chemistry Laboratory – TR
Location:
Phone: 248-964-8070
Last Updated
7/19/2021
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