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HelpTest Code LAB16 Electrolytes
Clinical System Name
Electrolytes
Synonyms
LAB16
Lytes
Sample Requirements
Specimen: Whole Blood
Container(s): Lt. Green/Mint Top Lithium Heparin, Lt. Green/Lithium Heparin Microtainer, Gold SST, Gold Microtainer, Dark Green/Sodium Heparin, Red
Preferred Vol: 1.0 mL
Minimum Vol: 0.5 mL
Notes: For fastest electrolyte turnaround time, please see test for Electrolytes Syringe
Processing Instructions
Reject due to: Insufficient Quantity, hemolysis, age of specimen
Spin: Y
Aliquot: Y
Storage location: Core 5 Chemistry Refrigerator
Off-site collection: Specimen should be centrifuged within 2 hours of collection. Spin blood and transfer serum or plasma to plastic tube and refrigerate or freeze.
Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum or Plasma | RT |
≤ 24 h |
| Serum or Plasma | 2-8 C |
≤ 3 d |
| Serum or Plasma | -20 C or -70 C |
≤ 30 d |
Availability
| STAT | Performed | TAT |
|---|---|---|
| Y | 24/7 | 1 h |
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Core Chemistry
Phone Number: 206-987-2617 (Client Services)
CPT Codes
80051
Methodology
Method: Potentiometric and Enzymatic Endpoint method by Vitros 4600
Analytical Volume: 0.20 mL serum or plasma
Reference Range
|
Reference Ranges |
||
|
Analyte (unit) |
Age |
Serum or Plasma |
|
Sodium (mmol/L)
|
0 - 1 w 1 w - adult |
132 - 142 135 - 145 |
|
Potassium (mmol/L) |
0 - 2 d 2 d - 3 m 3 m - adult |
3.7 - 5.9 3.4 - 5.6 3.5 - 5.5 |
|
Chloride (mmol/L) |
0 - 1 y 1 y - adult |
96 - 110 96 - 109 |
|
CO2 (mEq/L) |
All ages |
19 - 31 |
Description
Rapid analysis of sodium, potassium, chloride, carbon dioxide, and calculation of anion gap.
Critical Values
|
Analyte (units) |
Results |
|||
|
Age |
Low |
High |
||
|
Sodium (mmol/L) |
All ages |
≤ 124 |
≥ 160 |
|
|
Potassium (mmol/L) |
0 -2 day 2 day – 3 m 3 m - adult |
< 3.1 < 3.1 < 3.1 |
> 6.4 > 5.9 > 5.9 |
|
|
Chloride (mmol/L) |
All ages |
≤ 70 |
≥ 130 |
|
|
CO2 (mEq/L) |
All ages |
≤ 10 |
≥ 40 |
|