Urine| Hair Follicle | Oral Fluid | Blood | ETG
Hair testing is recognized as an effective method for identifying drug and alcohol consumption. It captures a long-term record of alcohol and drugs by embedding biomarkers within the fibers of the growing hair strand. When taken near the scalp, hair offers up to a 3-month detection range for alcohol and drugs. Hair is easy to collect, challenging to tamper with, and straightforward to transport.
A sample measuring 1.5 inches consisting of approximately 200 hair strands (similar to the size of a #2 pencil) near the scalp provides 100mg of hair, which is the optimal sample for screening and confirmation. For EtG, supplemental tests, and/or any screenings beyond 10 panels, a 150mg specimen is advised. We suggest using a jeweler’s scale to measure the specimen. If scalp hair is not available, an equivalent amount of body hair can be collected. By head hair, we mean only scalp hair. Body hair includes all other types (such as facial, axillary, etc.).
Process Overview
The lab analysis of a drug test result encompasses four primary steps: Accessioning, Screening, Extraction, and Confirmation.
Accessioning includes the initial processing of a sample into the lab's system. This step involves ensuring the sample was sealed and sent correctly, assigning a random LAN (Laboratory Accessioning Number), and completing any extra data input not included by an electronic chain of custody system.
Screening is a preliminary check for drug use. Although Screening is a cost-efficient method to exclude drug use in most samples, a positive result needs confirmation for legal acceptance. Samples that show a preliminary positive in Screening need a secondary confirmation.
If a sample shows a preliminary positive during the Screening stage, additional hair is extracted from the original specimen and prepped for Extraction. In this process, drugs are taken from hair at a significantly lower concentration compared to other methods (e.g., urine or oral fluid), making hair drug screening the most challenging method to execute.
Any positive screening result undergoes Confirmation through GC/MS, GC/MS/MS, or LC/MS/MS. All preliminary positive samples are washed before confirmation if needed. The complete laboratory process from Accessioning to Confirmation is evaluated under both the CAP (College of American Pathologists) Hair label and the accreditation to ISO / IEC 17025 standards.
Advantages of hair drug testing:
Limitations:
Note: Often called "hair follicle tests," the analysis actually examines the hair strand, not the follicle beneath the scalp.
Hair follicle testing offers clear advantages over traditional urine testing in Carlson, NE.Accuracy and reliability define hair testing as superior.
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