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HelpTest Code VLTB Volatile Screen, Blood
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Whole bloodOrdering Guidance
This test is not performed using chain of custody. For chain of custody testing, order VLTBX / Volatile Screen, Chain of Custody, Blood.
Additional Testing Requirements
If measurement of ethylene glycol is also needed, order ETGL / Ethylene Glycol, Serum.
Specimen Required
Container/Tube:
Preferred: Gray top (potassium oxalate/sodium fluoride)
Acceptable: Lavendar top (EDTA) or green top (sodium heparin)
Specimen Volume: 2 mL
Collection Instructions: Do not use alcohol to clean arm. Use alternatives such as Betadine to cleanse arm before collecting any specimen for volatile testing.
Specimen Minimum Volume
0.5 mL or amount to fill 1 tube
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole blood | Refrigerated (preferred) | 14 days |
| Frozen | 28 days | |
| Ambient | 24 hours |
Reference Values
Methanol:
Not detected (Positive results are quantitated.)
Toxic concentration: ≥10 mg/dL
Ethanol:
Not detected (Positive results are quantitated.)
Toxic concentration: ≥400 mg/dL
Isopropanol:
Not detected (Positive results are quantitated.)
Toxic concentration: ≥10 mg/dL
Acetone:
Not detected (Positive results are quantitated.)
Toxic concentration: ≥10 mg/dL
Day(s) Performed
Monday through Saturday
CPT Code Information
80320
G0480 (if appropriate)
Report Available
1 to 2 daysReject Due To
| Gross hemolysis | OK |
| Gross lipemia | Reject |
| Gross icterus | OK |
Method Name
Headspace Gas Chromatography Flame Ionization Detector (HSGC-FID)
Secondary ID
89190Testing Algorithm
This test includes analysis of methanol, ethanol, isopropanol, and acetone.
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.