Customer / distributor unwilling to return / unresponsive.Investigation conclusion: an investigation was performed on retention devices from the reported lot number.Retention devices were tested with qc cut-off urine standard (20 miu/ml), qc cut-off serum standard (10 miu/ml), and high hcg (215.2 - 232.6 iu/ml) clinical urine.Results were read at 3 minutes for urine samples and at 5 minutes for serum samples.All devices produced expected positive results.No false negative results were observed.The case details were reviewed along with the complaint history for the reported issue and no indications of a systemic issue were identified.Batch record review found no relevant non-conformances; the lot met all final release specifications.Review of the risk management report for this product found that the reported issue is within the risk profile for this device; no new hazard has been identified.The reported complaint was not replicated.Limited details regarding patient, product, and testing information could be obtained.A probable cause could not be identified based on the information available.Per the package insert: very dilute urine specimens, as indicated by a low specific gravity, may not contain representative levels of hcg.False negative results may occur when the levels of hcg are below the sensitivity level of the test.When pregnancy is still suspected, a first morning urine specimen should be collected 48 hours later and tested.This test provides a presumptive diagnosis for pregnancy.A confirmed pregnancy diagnosis should only be made by a physician after all clinical and laboratory findings have been evaluated.
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