Jan 30, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Toxicology

Barbiturates, Urine Screen

Barbiturates, Urine Screen (HCUPNL) Toxicology Lab Test

Name: Barbiturates, Urine Screen

Test Name: Barbiturates, Urine Screen

Health Link Test Code: HCUPNL

LIS Test Code: UPNL

CPT Code(s): See Drug Screen, Urine (Stat)

Included In: Drug Screen, Urine (Stat)

Methodology: Enzyme Immunoassay

Days Performed: Daily, 24 hours.

Stat In-Lab Turnaround Time: 1 hour.

Specimen: Random urine

Collection Container: Sterile screw cap container

Collection Instructions:

If confirmation is requested on a specimen with a "screen positive" result, 10 mL of urine is needed for the confirmatory analysis.

Collection Volume: 25 mL

Pediatric Collection Volume: 2 mL

Stability Refridgerated:

Up to 24 hours

Stability Frozen:


Sample Analyzed: Urine aliquot

Testing Volume: 10 mL

Pediatric Testing Volume: 0.5 mL

Specimen Processing:

Refrigerate specimen.

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.


Qualitative screening test. Results reported as "not detected" or "screen positive".

Interpretation Type: Expected Results

Test Limitations:

This is a screening test. Results are to be used for medical purposes only.

Additional Information:

A cut-off value of 200 ng/mL is used to determine whether barbiturates are "screen positive". If screening test is reported as "screen positive", confirmation and identification can be made (at additional charge) by a reference lab. Please submit an add-on order within 7 days of collection if confirmatory testing is needed.