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Lidocaine
Test Code605
CPT Codes
80176
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Patient Preparation
Collect as a trough just prior to next dose
Minimum Volume
0.2 mL
Other Acceptable Specimens
Plasma collected in an EDTA (lavender-top), sodium heparin (green-top), sodium fluoride (gray-top), or sodium oxalate (gray-top) tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum Separator Tube (SST®)
Methodology
Immunoassay (IA)
Setup Schedule
Sets up 5 days a week.
Clinical Significance
Lidocaine direct injection or infusion is used in the emergency treatment of ventricular arrhythmias caused by acute myocardial infarction, open-heart surgery. It is also used for topical anesthesia administered as a gel or by injection. Lidocaine levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.