Barbiturates – Semi Quant
| Test Mnemonic | Barbiturate, Urine Semi Quant |
|---|---|
| CPT Code | 83516 |
| Also Known As | Barb |
| Specimen Type | Urine |
| Specimen Container | Plastic container w/ tightly fitting cap |
| Alternate Speciman Type | None |
| Preferred Volume | 1.0 mL |
| Minimum Volume | 0.5 mL |
| Specimen Collection | Routine voided urine collection |
| Specimen Process | Collect freshly voided urine in plastic containers |
| Specimen Transport Storage | Refrigerated |
| Specimen Stability | 7 days refrigerated (2-8°C); 3 months frozen (-20°C or less) |
| Specimen Rejection | • Improperly labeled. • Incomplete information on the requisition. • Too old for processing. • Failure to meet volume criteria. • Leaking primary or secondary specimen container. • Wrong collection container for test ordered. • Gross contamination. • Improper storage |
| Methodology | Enzyme Immunoassay |
| Use | For the semi-quantitative determination of barbiturates in human urine |
| Clinical Signifigance | Barbiturates are nervous system depressants, and usually taken orally, injected intravenously or intramuscularly. They are absorbed rapidly. Barbiturates are classified based on their duration of action ranging from a few minutes to a day or more. Barbiturate abuse can lead to respiratory depression or coma in severe cases. Most commonly abused barbiturates are the short acting ones, including pentobarbital and secobarbital. Frequently abused long-acting barbiturate, phenobarbital, is excreted in urine and appears primarily unchanged. Detection of barbiturates or their metabolites in urine can be used as an indication for use of barbiturates. |
| Reference Range | <200 ng/mL is Negative |
| Day Run | Mon-Fri |
| Time Run | As Received |
| Time Reported | 3 days |
| Test Type | Tox |
© 2025 Elite Diagnostics. All Rights Reserved.