Investigation conclusion: customer's observation was not replicated in-house with retention and return devices.Retention devices were tested with 20 mlu/ml hcg urine cutoff control and 3 high level of hcg urine controls (201.8 iu/ml and 205.2 iu/ml), all results were positive at 3 min read time.Returned devices were tested 20 mlu/ml cutoff hcg urine control and hcg high level 201.8 mlu/ml urine control; all results were positive at 3 min read time and met qc spec.No false negatives were obtained.Mfg batch record review did not uncover any abnormalities.Per pl, "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 pt specimen in-house analysis.Based on the info available, there is no indication of a product deficiency.No corrective action is required at this time.
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Report received of a false negative hcg x 2 for one pt.Pt presented with abdominal pain.Pt's last menstrual period two months ago.Customer reported one pt's urine, collected 10am on (b)(6) 2015; rang negative at 3 minutes but at 30 minutes had a test line.Repeat run; negative at 3 minutes, test line at approx 13 minutes.No confirmatory results obtained.No specific pt info provided.No adverse pt sequela reported.No add'l details reported.
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