On (b)(4) 2014, the field service engineer (fse) evaluated the instrument and observed the rbc (red blood cell) controls were recovering low after calibration.The fse replaced the rbc and wbc (white blood cell) dispensers, bsv (blood sampling valve), piercing needle for the primary mode, and all medical grade aspirate tubing.The fse flushed the aspirate line from pinch valve 70 (pv70) to the overflow tank in the rear of the instrument.Per conversation with the fse on (b)(4) 2014, the replacement of the bsv and proper setup of the aspiration pathway resolved the issues and calibration verified the changes and resolved the issues.(b)(4).
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