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Lidocaine
Test CodeLIDO
Quest Code
605
Alias/See Also
605
Xylocaine
Xylocaine
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
Refrigerated
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.
Reference Range
1.5-5.0 mg/L
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.
Performing Laboratory
Quest Diagnostics Chantilly Nichols Institute
14225 Newbrook Dr.
Chantilly, VA 20151-2228