Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

DRUGS OF ABUSE SCREEN, URINE

General Information

Lab Order Codes:

ABUS

Synonyms:

Urine drug screen

CPT Codes:

G0431 – Drug screen, qualitative; multiple drug classes by high complexity test method (e.g., immunoassay, enzyme assay), per patient encounter

Confirmations may be added at the request of the provider at an additional charge.

Test Includes:

Major metabolites of drugs of abuse (phencyclidine, benzodiazepines, cocaine metabolite, amphetamines, tetrahydrocannabinol, opiates, barbiturates) in urine.

Logistics

Test Indications:

Useful for the qualitative determination of the presence of the major metabolites of drugs of abuse in urine.

Lab Testing Sections:

Chemistry

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 hour or STAT (30 minutes)

Special Instructions:

Confirmatory testing, for positive screening results requires a separate order. Use Add Order in HIS (Hospital Information System) orders to request the specific confirmatory test.

Specimen

Specimen Type:

Urine

Container:

Urine Cup

Draw Volume:

10 mL (Pediatric Minimum: 4 mL, Absolute Minimum: 1 mL) urine

Note: Collection of the Absolute Minimum volume does not permit confirmatory or repeat testing.

Processed Volume:

Same as Draw Volume

Collection:

Random urine

Special Processing:

Lab Staff: No preservative. Refrigerate specimen after collection. Centrifuge specimens containing particulates.

Patient Preparation:

None

Sample Rejection:

Unlabeled or mislabeled specimen; adulterated specimen

Interpretive

Reference Range:

Negative

This test differentiates between positive and negative specimens at the designated cut-off concentrations.

Drug Name:

Cut-off concentration:

Confirmatory Test:

Phencyclidine:

25 ng/mL

PCCON

Benzodiazepines:

200 ng/mL

BECON

Amphetamines:

1000 ng/mL

AMCON

Cocaine (Benzoylecgonine):

300 ng/mL

COCON

Tetrahydrocannabinol:

50 ng/mL

THCON

Opiates (Morphine):

300 ng/mL

OPCON

Barbiturates:

200 ng/mL

BACON

Critical Values:

Call any positive results

Limitations:

This test is a qualitative screening test. Confirm positive results by another method, such as GC/HPLC if indicated.

Methodology:

Syva® Emit II Immunoassay

References:

Jacobs and DeMott (2001) Laboratory Test Handbook, 5th edition, Lexi-Comp, Inc., Hudson, OH, p 788

Siemens Dimension Vista Flex Reagent Cartridge Inserts, Newark, DE, 19714 (See below for individual analyte)

AMPH Flex® reagent cartridge insert sheet PN 781091.001,10/29/2012, Rev D

BARB Flex® reagent cartridge insert sheet PN 781096.001,10/13/2011, Rev D

BENZ Flex® reagent cartridge insert sheet PN 781097.001,10/29/2012, Rev F

COC Flex® reagent cartridge insert sheet PN 781092.001,10/29/2012, Rev D

OPI Flex® reagent cartridge insert sheet PN 781093.001,11/6/2012, Rev E

PCP Flex® reagent cartridge insert sheet PN 781094.001,11/7/2012, Rev D

THC Flex® reagent cartridge insert sheet PN 781095.001,11/7/2012, Rev D

Updates:

4/27/2006: TCA (Tricyclic Antidepressants) are no longer part of this assay.
3/30/2009: Revised volume to include Pediatric Minimum.
5/11/2010: CPT update, previously reported as 80101.
2/8/2011: CPT update, quantity changed
1/3/2012: Test no longer includes TCA.



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