Customer reported that the rp500 instruments displayed question values [.?] for sodium (na), potassium (k), and calcium (ca) on a patient sample and the instrument did not report any results for these analytes.Customer indicated that a blood gas sample was collected from a resuscitated patient on (b)(6) 2014.Customer indicated that they repeated the measurement on the same system(s/n (b)(4)) and another rp500 system(s/n (b)(4)) and both systems displayed question values [.?] for sodium (na), potassium (k), and calcium (ca) and the systems did not report any results for these analytes.Customer indicated that approximately 10 minutes later, they measured a sample on their rl1265 blood gas system and results for the all the analytes were generated including sodium (na), potassium (k), and calcium (ca).Customer mentioned that patient died but not because of the rp500 displayed question values [.?] for sodium (na), potassium (k), and calcium (ca) and it did not report results for these analytes.
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