Investigation conclusion: customer's observation was not replicated in-house with retention devices.Retention devices were tested with 25 miu/ml hcg urine cutoff control all results were positive at 3 min read time and met qc specification.Manufacturing batch record review did not uncover any abnormalities.Per package insert, "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." root cause could not be determined without patient specimen in-house analysis.Based on the information available, there is no indication of a product deficiency.No corrective action is required at this time.
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