Urine| Hair Follicle | Oral Fluid | Blood | ETG
Hair analysis has become known as an effective method for identifying drug and alcohol consumption. Hair retains a prolonged record of substance use by embedding biomarkers within the fibers of the growing strand. When sourced near the scalp, hair can offer up to an estimated 3-month detection timeframe for both alcohol and other substances. Collecting hair is straightforward, relatively hard to tamper with, and simple to transport.
A 1.5-inch segment of roughly 200 hair strands (comparable to the circumference of a #2 pencil) closest to the scalp will yield 100mg of hair, which is the optimal sample size for both screening and confirmation. For EtG, additional tests, or analyses beyond 10 panels, a collection of 150mg is advisable. It is suggested to measure the sample with a jeweler’s scale. If scalp hair isn't accessible, a similar quantity of body hair can be obtained. When we mention head hair, we mean scalp hair exclusively. Body hair encompasses all other types of hair (facial, axillary, etc.).
Process Overview
The primary procedures involved in laboratory processing of a drug test result consist of Accessioning, Screening, Extraction, and Confirmation.
Accessioning includes the initial incorporation of a sample into the lab's system. This involves confirming that the sample was properly sealed and shipped, assigning a random LAN (Laboratory Accessioning Number), and finalizing any additional data entry absent from an electronic chain of custody system.
Screening is a preliminary brisk test for substances of abuse. Although Screening is an economical method to exclude drug usage on most samples, a positive screen requires confirmation for court authority. Any samples assumed to be positive in Screening necessitate secondary confirmation.
If a sample is assumed positive during the Screening process, further hair is extracted from the original sample and readied for Extraction. At this stage, substances are extracted from hair at a much lower concentration compared to other techniques (e.g., urine or oral fluid), which explains why hair drug screening is the most challenging method to conduct.
Verification of any positive screening outcome is achieved through GC/MS, GC/MS/MS, or LC/MS/MS. All samples presumed positive undergo washing before confirmation as necessary. The comprehensive laboratory processes from Accessioning to Confirmation is examined under the CAP (College of American Pathologists) Hair standard and the accreditation to ISO / IEC 17025 standards.
Benefits of hair drug testing:
Constraints:
Note: While frequently called "hair follicle tests", the examination is conducted on the hair strand and not the hair follicle beneath the scalp
Why Hair Follicle Testing Beats Urine Testing in Benton, ME is evident in several advantages over traditional urine tests. Hair drug tests offer superior detection accuracy and reliability, due to their ability to screen for drug use over a prolonged period.
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