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Test Code =Lytes =Lytes

Important Note

Place specimen in outside pocket of a pre-filled biohazard bag of ice, then put into a separate biohazard bag for transport.

Clinical System Name

Electrolytes, Syringe

Sample Requirements

Specimen: Whole Blood

Container(s):  Heparinized Syringe, 2 Capillary Blood Gas Tubes

Preferred Vol:  1.0 mL Heparinized Syringe or 2 Full Capillary Blood Gas Tubes

Minimum Vol:  2 Heparinized Capillary Blood Gas Tubes  (EPOC capillary tubes are not acceptable).

 

Notes: Sample can be shared with a CBG if 2 capillary tubes are collected.

Processing Instructions

Reject due to:  Inadequately filled specimens, air bubbles, visible clots, age of specimen

Spin: N

Aliquot: N

Temp: 0-4 C

Storage location:  Core Lab Fridge

 

Off-site collection: Samples collected outside Children's must be drawn in a heparin syringe and sent at 0-4 C within 4 hours.

Stability

Specimen Type Temperature Time

Heparinized Syringe, Heparinized Capillary Blood Gas Tube

RT

≤ 30 min

Heparinized Syringe, Heparinized Capillary Blood Gas Tube

0-4 C

≤ 4 h

  -20 C or -70 C

N

Availability

STAT Performed TAT
Y 24/7 15 min

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Core Chemistry

Phone Number: 206-987-2617 (Client Services)

CPT Codes

80051

Methodology

Method:  Potentiometric method by SIEMENS RAPIDPOINT 500 Analyzer

Analytical Volume: 

0-2 Y

1 Heparinized Capillary Blood Gas Tube

> 2 Y

0.5 mL Heparinized Syringe

Reference Range

               Reference Ranges

Analyte (unit)

Age

Whole Blood

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 total calculated (mEq/L)

All ages

18 - 27

 

Description

Rapid analysis of sodium, potassium, chloride, and carbon dioxide.

Critical Values

                        Critical Values

   
Analyte (unit)

Age

Low

High

Sodium (mmol/L)

All

≤ 124

≥ 160

Potassium (mmol/L)

0 -2 day

2 day – adult

≤ 3.0

≤ 3.0

≥ 6.5

≥ 6.0

Chloride (mmol/L)

Child – adult

≤ 70

≥ 130

CO2 total calculated (mEq/L)

All Ages

≤ 10

≥ 40