|
The investigation determined that a higher than expected vitros ammonia (amon) result was obtained from a vitros liquid performance verifier (lpv) processed using vitros chemistry products amon slides lot 1020-0265-3649 on a vitros 350 chemistry system.The assignable cause of the higher than expected vitros amon result is an instrument issue related to microslide incubator contamination.The results of a vitros amon within run precision test were not within expectations.The cause of the microslide incubator contamination is likely due to user error as the customer had been using ammonia based cleaning products on the analyzer cabinetry, on the outside of the analyzer prior to the event.The customer performed maintenance actions on the vitros 350 system which included replacing the evaporation caps and cleaning the incubator slots.Following maintenance actions, the results of a vitros amon precision test were within ortho acceptable guidelines.Additionally, following a recalibration event, vitros lpv fluid results were acceptable verifying vitros reagent and instrument performance.
|