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Test Code LYTES BF Body Fluid Electrolytes

Clinical System Name

Body Fluid Electrolytes

Synonyms

Lytes, Stool
Stool Na + K

Sample Requirements

Specimen:  Body Fluid

Container(s): Sterile Screw-Capped Container, Sterile Screw-Capped Tube or Syringe

Preferred Vol: 1 mL body fluid

Minimum Vol: 0.1 mL supernatant

 

Note: Note type of body fluid on requisition. Analytes included are sodium and potassium. Potassium is affected by hemolysis. For stool, sample must be watery diarrhea. Specimen cannot be a formed stool.

 

Processing Instructions

Reject due to: Age of Specimen

Spin: Y

Aliquot: Y

Temp: 2-8oC

Storage location: Core 5 Chemistry Refrigerator

 

Off-site collection: For stool, sample must be watery diarrhea. Specimen cannot be a formed stool. Spin sample, refrigerate supernatant. Indicate specimen type on requisition.

Stability

 

Specimen Type Temperature Time
Body Fluid RT

24 H

Body Fluid 2-8oC

 7 D

Body Fluid -20oC or -70oC

 180 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

Reference Range

Reference ranges are not available for BF.
 

Methodology

Method:  Potentiometric method by Vitros 4600

Analytical Volume:  0.02 mL supernatant body fluid + 0.03 mL dead space

CPT Codes

84302

84132