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Patient 1
THE INVESTIGATION DETERMINED THAT A LOWER THAN EXPECTED VITROS DGXN RESULT WAS OBTAINED WHEN TESTING A PROFICIENCY SAMPLE USING A VITROS 4600 CHEMISTRY SYSTEM. THE INVESTIGATION WAS UNABLE TO DETERMINE THE ASSIGNABLE CAUSE OF THE EVENT. A REVIEW OF HISTORICAL QUALITY CONTROL DATA CONCLUDED THAT THERE IS NO ISSUE WITH THE VITROS DGXN SLIDE LOT BASED ON THE DGXN QC PERFORMANCE. THE ALT AND DGXN WITHIN-RUN MARKER PRECISION RESULTS WERE ACCEPTABLE INDICATING THE VITROS 4600 CHEMISTRY SYSTEM WAS PERFORMING AS INTENDED. HOWEVER, AN ORTHO FE HAS BEEN REQUESTED ON SITE DUE TO CONDITION CODE U90-382 (IR WASH ERROR) THAT OCCURRED ONE TIME DURING THE DGXN PRECISION TESTING. THEREFORE, AN INSTRUMENT ISSUE CANNOT BE ENTIRELY RULED OUT AS A CONTRIBUTING FACTOR TO THIS EVENT. THE (B)(6) SAMPLES ARE FROM THE 2017 C A SURVEY, WERE INITIALLY PROCESSED (B)(6) 2017 AND STORED FROZEN. THE RECOMMENDED OPEN STORAGE IS 2-8 C FOR 7 DAYS. LONG TERM STORAGE AND STABILITY FOR THESE CAP FLUIDS IS UNKNOWN, THEREFORE, IMPROPER FLUID HANDLING (STORAGE) CANNOT BE RULED OUT AS CONTRIBUTING TO THE EVENT.