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A united states (us) customer contacted the siemens healthcare diagnostics remote services center (rsc) regarding an erroneously depressed sodium (na) result on a patient sample obtained on an atellica ch 930 analyzer.Siemens healthcare diagnostics headquarters support center (hsc) concluded the investigation of the event.Hsc reviewed the instrument data files and the information provided by the customer.Calibration and quality control (qc) recovery was within the customer¿s expected ranges, indicating that the sodium (na) assay was performing acceptably.Hsc concluded that the cause of the event was consistent with a sample integrity issue, due to the presence of fibrin in the sample that was aspirated on the initial aspiration, causing a decreased sample volume to be aspirated, thus causing the lower sodium recovery.The initial aspiration cleared the fibrin from the sample, and repeated aspirations were not affected.The customer is operational.The device is performing within specifications.No further evaluation is required.
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