Siemens healthcare diagnostics has received customer complaints for the dimension vista magnesium (mg) lot 15063ba.The complaints were related to erroneous low results on a small number of reagent wells.Siemens healthcare diagnostics issued an urgent medical device recall communication (b)(4) dated september 2015 instructing customers to discontinue use and discard any remaining inventory of the affected lot and to contact siemens healthcare diagnostics for replacement product.Data collected from the customer complaints shows that there is the potential for under-recovery on certain wells for quality control(qc) and patient sample results.When this issue occurred, the under-recovery ranged from -0.3 mg/dl [0.12 mmol/l] to -1.6 mg/dl [0.66 mmol/l].The average under-recovery was -1.0 mg/dl [0.41 mmol/l].This issue is demonstrating a low frequency of occurrence with an estimate one (1) in every 10,000 tests may be affected.Repeating the sample on a new well or a new flex cartridge resolves the issue.This issue is likely to be detected by quality control (qc) or calibrators if they are run on the affected wells of reagent.Siemens healthcare diagnostics has confirmed that the customer received the urgent medical device recall communication (b)(4).They had not discarded the lot.The issue has now been resolved by the customer discontinuing use of the lot.
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