A CUSTOMER OBSERVED BIASED LOW MASS CREATININE KINASE MB ISOENZYME (MMB) RESULTS ON PATIENT CROSSOVER AND QC SAMPLES ON LOT ED5167 REAGENT CARTRIDGES. NO PATIENT RESULTS WERE REPORTED TO PHYSICIANS. PATIENT TREATMENT WAS NOT ALTERED OR PRESCRIBED ON THE BASIS OF THE BIASED LOW MMB RESULTS. THERE WAS NO REPORT OF ADVERSE HEALTH CONSEQUENCES AS A RESULT OF THE BIASED LOW MMB RESULTS.
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Patient 1
THE CAUSE OF THE BIASED LOW MASS CREATININE KINASE MB ISOENZYME (MMB) RESULTS IS LOT TO LOT VARIABILITY OF THE MASS CREATINE KINASE MB ISOENZYME FLEX? REAGENT CARTRIDGE. THE ISSUE WAS RESOLVED BY THE CUSTOMER WITH THE USE OF AN ALTERNATE LOT WHICH PROVIDED BETTER CORRELATION TO THE CUSTOMER'S PRIOR MMB LOT. SIEMENS HEALTHCARE TECHNICAL SERVICE LABORATORY CONDUCTED AN INVESTIGATION OF LOT ED5167 AND DID NOT CONFIRM THE CUSTOMER'S COMPLAINT FOR LOT TO LOT VARIABILITY. NO FURTHER INVESTIGATION IS REQUIRED.