Urine| Hair Follicle | Oral Fluid | Blood | ETG
Hair analysis is recognized as an effective approach in identifying substance and alcohol consumption. Hair captures long-duration evidence of substances by retaining biomarkers within its strands. When clipped near the scalp, hair can indicate substance use over approximately three months for alcohol and other substances. Collecting hair is straightforward, less prone to tampering, and easy to transport.
A 1.5-inch segment comprising around 200 hair strands (similar to a #2 pencil thickness) nearest the scalp offers 100mg, an optimal sample for both screening and validation. For EtG, supplementary, and/or tests beyond 10 panels, 150mg of the sample is advised. It's suggested to gauge the sample weight using a jeweler’s scale. Should scalp hair be inaccessible, a comparable amount of body hair might be obtained. "Head hair" specifically refers to scalp hair. "Body hair" pertains to all other varieties (facial, underarm, etc.).
Process Overview
The primary phases in processing laboratory drug test outcomes encompass Accessioning, Screening, Extraction, and Confirmation.
Accessioning involves initially entering the sample into a lab’s records. This includes ensuring proper sealing and shipment of the sample, assigning a unique LAN (Laboratory Accessioning Number), and finalizing any extra data input not available via an electronic chain of custody system.
Screening constitutes a preliminary evaluation for substance abuse. Screening serves as a cost-effective means to exclude substance use in most samples, but a positive outcome requires validation for legal proceedings. All samples presumptively positive during Screening necessitate secondary confirmation.
Should a sample yield a presumptive positive at Screening, additional hair is extracted from the original collection and made ready for Extraction. During this phase, substances are isolated from hair at significantly reduced concentrations compared to other methods (e.g., urine or oral fluids), making hair drug analysis the most complex methodology to execute.
Confirming any positive screening outcome is achieved through GC/MS, GC/MS/MS, or LC/MS/MS. All samples with positive presumptions undergo washing before confirmation as necessary. The complete lab procedure from Accessioning to Confirmation is evaluated under the CAP (College of American Pathologists) Hair guidelines and adherence to ISO / IEC 17025 standards.
Advantages of hair drug testing:
Limitations:
Note: Although frequently termed "hair follicle tests," the procedure examines the hair strand itself, not the follicle beneath the scalp.
Why Hair Follicle Testing Beats Urine Testing in Hanna, OK Hair testing surpasses traditional urine tests through superior detection accuracy and reliability, offering extensive advantages in substance detection.
Choosing hair testing ensures a robust approach against the limitations of urine tests, enhancing substance detection strategy.
Extended Detection Window in Hanna, OK Hair follicle testing excels with its ability to reveal drug use over a prolonged timeframe—up to 90 days—providing employers with a thorough insight into an employee's or candidate's substance record.
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