PharmCheck drug patch is a collection device designed to retain evidence of drug use for an extended period. It can detect use 24-48hours before the application of the patch, during the wearing of the patch or both.
For example a PharmCheck patch work for 7 days might be positive because of drug use on Day 1 or Day 6.
False positives only apply to the immunoassay screen, not LC-MS/MS confirmation. All presumptive positive screens are sent for confirmation testing. As an additional safeguard, the laboratory utilizes blind quality assurance samples in the testing process.
All positive samples are placed in frozen storage for 12 months prior to disposal in the event a result is challenged.
