{"id":50340,"date":"2020-07-05T22:17:14","date_gmt":"2020-07-05T22:17:14","guid":{"rendered":"https:\/\/www.nationaldrugscreening.com\/?post_type=faqs&#038;p=50340"},"modified":"2020-07-05T22:17:29","modified_gmt":"2020-07-05T22:17:29","slug":"why-is-it-necessary-is-that-instant-drug-testing-results-that-screen-non-negative-be-sent-to-a-lab-for-confirmation-testing","status":"publish","type":"faqs","link":"https:\/\/www.nationaldrugscreening.com\/faqs\/employer-drug-testing\/why-is-it-necessary-is-that-instant-drug-testing-results-that-screen-non-negative-be-sent-to-a-lab-for-confirmation-testing\/","title":{"rendered":"Why is it necessary is that instant drug testing results that screen non negative be sent to a lab for confirmation testing?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">The primary reason being that all instant non-negative are only 97%-98% accurate which is shown on a package insert for any brand that is FDA Cleared.<\/h2>\n\n\n\n<p>All positive initial screens should be confirmed by GC\/MS (Gas Chromatagraph\/Mass Spectrometry) at a DHHS\/SAMHSA certified laboratory.&nbsp; This is due to the fact that any laboratory or on-site\/instant drug screen, no matter how accurate, is not 100% accurate in identifying drugs of abuse in urine.&nbsp; The initial screens react to multiple drug metabolites, and can under certain non-ideal situations, produce a positive result when the target drug is not present or is present at a level below the GC\/MS confirmation cut-off level.&nbsp; GC\/MS confirmation is a more specific test that looks for and if present quantifies the target metabolite.&nbsp; It is the GC\/MS confirmation through a certified laboratory that will stand up in the court of law if the drug test result is challenged by the donor.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why not just send instant drug testing specimens that are non-negative on initial screening to the lab to be screened again and then if non-negative it can go to GC\/MS confirmation?<\/h2>\n\n\n\n<p>Sending the specimen to a lab as a \u201cBlind screen\u201d where the specimen will be screened by the laboratory, and if found positive by the lab screen, will be confirmed by GC\/MS at the lab.&nbsp; The error with this method is that the lab screen may produce a negative result on a specimen that is near the screen cut-off and that would confirm by GC\/MS.&nbsp; However, the specimen will never be sent to GC\/MS for confirmation if the labscreen calls the specimen \u201cnegative\u201d.&nbsp; Therefore, any error or inaccuracy in the lab screen will result in a \u201ctrue positive\u201d specimen being ruled \u201cnegative\u201d<br><\/p>\n","protected":false},"author":1,"template":"","acf":[],"_links":{"self":[{"href":"https:\/\/www.nationaldrugscreening.com\/wp-json\/wp\/v2\/faqs\/50340"}],"collection":[{"href":"https:\/\/www.nationaldrugscreening.com\/wp-json\/wp\/v2\/faqs"}],"about":[{"href":"https:\/\/www.nationaldrugscreening.com\/wp-json\/wp\/v2\/types\/faqs"}],"author":[{"embeddable":true,"href":"https:\/\/www.nationaldrugscreening.com\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":0,"href":"https:\/\/www.nationaldrugscreening.com\/wp-json\/wp\/v2\/faqs\/50340\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.nationaldrugscreening.com\/wp-json\/wp\/v2\/media?parent=50340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}