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Test Code Lytes Electrolytes

Clinical System Name

Electrolytes

Description

Rapid analysis of sodium, potassium, chloride, carbon dioxide, and calculation of anion gap.

Sample Requirements

Specimen: Whole Blood

Container(s):  Gold SST, Dark Green/Sodium Heparin, Red, Gold Microtainer, Lt. Green/Li Heparin Microtainer

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, Excessive bubbles, hemolysis

Spin: Y

Aliquot: Y

Temp: 2 - 8 C

Storage location:  Deliver to Core 5 Chemistry Refrigerator

 

Off-site collection: Spin blood; separate serum/plasma from cells within 2 hr. Send refrigerated.

Stability

 

See individual tests for stabillity information.

 

Availability

STAT Performed TAT
Y 24/7 1 h

 

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Core Chemistry

Phone Number: 206-987-2617

 

 

Reference Range

 

 

 

 

               Reference Range

 

Analyte

Age

Unit

Arterial

Venous

Capillary

(Neonates -

age 0 - 4 days)

Reportable Range

Sodium

 

0-1 wk

1 wk - adult

mmol/L

132 – 142

135 – 145 (a)

 

 

110 - 170

Potassium

0 – 2 day

2 day – 3 mo.

3 mo. - adult

mmol/L

3.7 – 5.9

3.4 – 5.6

3.5 – 5.5 (a)

 

 

1.4 – 12.0

Chloride

0 – 1 yr.

1 yr. – adult

mmol/L

96 – 110

96 – 109 (a)

 

 

70 - 125

pCO2

0 – 1 month

1 mo. - adult

 

(see capillary)

 

mmHg

26 – 40

35 – 45 (b)

41 – 51

41 – 51

 

 

 

28 - 49 (d)

 

10 - 170

 

Methodology

Method:  Potentiometric, and Enzymatic Endpoint method by Vitros 4600

Analytical Volume:  0.20 mL serum or plasma

Critical Values

 

Analyte (units)

                                                            Results

Age

Low

High

Sodium (mmol/L)

All

≤ 124

≥1 60

Potassium (mmol/L)

0 -2 day

2 day – adult

≤ 3.0

≤ 3.0

≥ 6.5

≥ 6.0

Cl (mmol/L)

Child – adult

≤ 70

≥ 130

pCO2

All Ages

≤ 20

≥ 70