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Vanderbilt Pathology Laboratory Services

Test Directory



POTASSIUM BLOOD (K)

Department: Chemistry
Test Synonym(s): K
CPT Codes: 84132
Methodology: Ion-selective electrode diluted (Indirect)
Reference Range: Abott Ranges 0-<1mo: 3.7-5.9 mmol/L Comment <3days: Premature 0-48 hour range is 3.0-6.0 mmol/L , 1mo-<1yr: 4.1-5.3 , 1-<12yrs; 3.4-4.7 , plasma 12-150yrs: 3.3-4.8 Comment: serum reference range is higher 3.5-5.1 mEq/L
Tube Type: Light green PST (Lithium Heparin with gel) tube - 4.5 mL
Specimen: Plasma
Pediatric Requirements: 1 light green top microtainer
Volume: 1 mL plasma
Minimum Volume: 0.3 mL plasma
Temperature: Separate within 1 hour and store/ship @ ambient temperature until delivery.
Stability: 7 Days at 20-25C, 7 Days at 2-8C, 1 year at -20C
Reasons for Rejection: Hemolysis, icteric specimens, and lipimia; improper collection; QNS
Days Performed: Daily
Times Performed: Continuous
TAT: STAT: 1 hour; ROUTINE: 2 hours after receiving in lab
Special Instructions: Hemolysis elevates value

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