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An outside of the united states (ous) customer contacted siemens customer care center to report discordant results that were obtained on one patient sample on the cs-5100 instrument.The following conclusion is made from the troubleshooting performed by siemens healthineers: based on the review of information provided, the probable cause of the discordant high pt.Inr (pt.Sec) results using dade innovin lot 564647 on the cs-5100 system could not be finally identified.However, the elevated result could be caused by an interaction between the multiple medications of this patient affecting the assay.The patient diseases as anti-phospholipid syndrome and dvt (deep vein thrombosis) may affect the pt.Inr values.No other discordant results were obtained; no invalid qcs measurements and no instrument flags have been identified.Reagents are functioning properly.Ultimately, no deficiencies in test performance were identified.The cause of the discrepant results cannot be finally identified.However, possible interference on the patient sample integrity caused by medication and existing illnesses cannot be completely ruled out.The customer is operational.The instrument is performing according to specifications.No further evaluation of this device is required.Note: dade innovin is marketed in the united states under material number 10873566.The 510(k) numbered documented in section g4 is for this product.
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