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Investigation conclusion: retention devices for the reported lot were tested with in-house drug free donor urine.All devices yielded expected negative results for all analytes at read time.No false positives were observed.Manufacturing batch records of the final-product, relevant product components, and quality control release data were reviewed.No relevant non-conformances, deviations, or abnormalities were found.All quality control specifications were met.Retention products performed as expected during in-house testing and could not replicate the reported complaint.This issue will be subject to tracking and trending.There is a possibility that technical or procedural errors, as well as other interfering substances in the urine specimen may cause erroneous results.Please refer to the "cross-reactivity" section within the performance characteristics portion of the package insert for a list of evaluated substances.This product provides only a qualitative, preliminary analytical result.A secondary method must be used to obtain a confirmed result.Based on the information available, there is no indication of a product deficiency and no corrective action is required.
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The customer reported four occurrences of false positive coc, mamp, and opi results using the multi-drug 6 panel screen test on multiple donors.Confirmatory testing at a laboratory provided negative results.The false positive results occurred on four out of four devices used.
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