-1739993209.png){kind=logo}
Home
HelpTest Code VLTUX Volatile Screen, Chain of Custody, Random, Urine
Additional Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| COCH | Chain of Custody Processing | No | Yes |
Testing Algorithm
This test includes analysis of methanol, ethanol, isopropanol, and acetone.
Specimen Type
UrineOrdering Guidance
For best clinical correlation, the recommended test is VLTBX / Volatile Screen, Chain of Custody, Blood.
Additional Testing Requirements
If urine creatinine is required or adulteration of the sample is suspected, order ADLTX / Adulterants Survey, Chain of Custody, Random, Urine in addition to this test.
Specimen Required
Supplies: Chain-of-Custody Kit (T282)
Container/Tube: Chain-of-Custody Kit containing the specimen containers, seals, and documentation required.
Specimen Volume: 10 mL
Collection Instructions: Collect a random urine specimen using the container provided, seal, and submit with the associated documentation to satisfy the legal requirements for chain of custody testing.
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 28 days | |
| Ambient | 24 hours |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Clinical Information
Urine provides a medium for easy screening for methanol, ethanol, isopropanol, and acetone.
Chain of custody is required whenever the results of testing could be used in a court of law. Chain of custody is a record of the disposition of a specimen to document the individuals that collected it, handled it, and performed the analysis. When a specimen is submitted in this manner, analysis will be performed in such a way that it will withstand regular court scrutiny.
Reference Values
Methanol
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
Toxic concentration: ≥10 mg/dL
Ethanol
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
Isopropanol
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
Toxic concentration: ≥10 mg/dL
Acetone
Not detected (Positive results are quantitated.)
Cutoff concentration: 10 mg/dL
Toxic concentration: ≥10 mg/dL
Day(s) Performed
Monday through Saturday
Report Available
1 to 2 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80320
G0480 (if appropriate)
Method Name
Headspace Gas Chromatography Flame Ionization Detector (HSGC-FID)
Forms
1. Chain of Custody Request is included in the Chain-of-Custody Kit (T282).
2. If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.