Lithium Level
| Abbrev Code: | LI | ||
| Order Code: | LAB29 | Order Name: | Lithium Level |
| Methodology: | Colorimetric test | ||
| CPT Codes: | 80178 x1, 80178 x1 | ||
| Turnaround Time: | Performed and reported 24 hours/day. | ||
| Associated Links: | |||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2.5 mL |
| Minimum\Peds Volume: | 0.6 mL |
| Container: | Red (no gel) |
| Collection Instructions: | 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 (Roche-Grand Itasca, Roche-Lakes, Roche-Northland, Roche-Range, Roche-Ridges, Roche-Southdale, Roche-St. John's, Roche-UMMC East, Roche-UMMC West) |
Interpretive
| Critical Range: | 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: | 0.6-1.2 mmol/L |
| Use: | Monitoring lithium therapy. |
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