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Lithium
MessagePerforming Lab: Lakeview, Regions
Test Code
0202
Alias/See Also
Sunquest: LI
CPT Codes
80178
Includes
Time of Last Dose, Lithium
Preferred Specimen
0.2 mL Serum Separator (gold-top) tube
Minimum Volume
0.1 mL
Other Acceptable Specimens
Red, Red/Gray, EDTA plasma (lavander-top)
Instructions
Collection:
Samples are commonly drawn approximately 12 hours after the last dose of lithium has been taken. If toxicity is suspected, then specimens can be drawn at any time.
Samples are commonly drawn approximately 12 hours after the last dose of lithium has been taken. If toxicity is suspected, then specimens can be drawn at any time.
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 8 hours
Refrigerated: 24 hours
Frozen: 6 months
Refrigerated: 24 hours
Frozen: 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Lithium Heparin Tube
Methodology
Colorimetric
Setup Schedule
Daily
Report Available
Same day.
Reference Range
0.6 - 1.2 mmol/L
Critical: >= 2.0 mmol/L
Critical: >= 2.0 mmol/L
Clinical Significance
Lithium is used in the treatment of bipolar (manic-depressive) illness. Lithium measurements are used to monitor patient compliance and therapy and to diagnose potential overdose. Symptoms of lithium intoxication include sluggishness, drowsiness, muscle weakness, and ataxia
