Lithium Level


Abbrev Code:LI   
Order Code:LAB29Order Name:Lithium Level
Methodology:Roche: Colorimetric test
Vista: Bichromatic endpoint
CPT Codes: 80178 x1, 80178 x1
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Roche Go Live Schedule



Collection Instructions

Specimen:Blood
Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Collection Instructions:Chemistry Tests Containers Chart
Specimen should be collected at least 8 -10 hours after the last dose and preferably at the same time of day for each patient. Do not draw in lithium heparin (green) tube.
Causes for Rejection:Samples drawn in gel tube. Hemolyzed and icteric specimens.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot within 4 hours of collection 1.25 mL, 0.2 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:1 day at room temperature; 7 days refrigerated; 6 months frozen.
Test Performed at or Referral Lab Chemistry  (Grand Itasca, Northland, Range, Roche-Lakes, Roche-Ridges, Roche-St. John's, Roche-UMMC East, Southdale, UMMC/UMMCH-West Bank)


Interpretive

Critical Range:Grand Itasca: Greater than 1.5 mmol/L
All other sites (Vista and Roche): Greater than 2.0 mmol/L. Levels higher than 1.5 mmol/L 12 hours after a dose indicate a significant risk of intoxication.
Therapeutic Range:Grand Itasca: 1.0-1.2 mmol/L
All other sites (Vista and Roche): 0.6-1.2 mmol/L
Use:Monitoring lithium therapy.


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