Description of Event or Problem · 1
USER REPORTS FALLING OUT HIGH ON TWO EXTERNAL PROFICIENCY SURVEY SAMPLES FOR VANCOMYCIN. SURVEY SAMPLE 1: REPORTED SURVEY RESULT 48.6 UG/ML. ACCEPTABLE SAMPLE RANGE IS 32.2 UG/ML TO 48.4 UG/ML. THE SAMPLE WAS REPEATED IN2008, AND RECOVERED 37.6 UG/ML. SURVEY SAMPLE 2: REPORTED SURVEY RESULT 13.0 UG/ML. ACCEPTABLE SAMPLE RANGE IS 8.6 UG/ML TO 12.9 UG/ML. THE SAMPLE WAS REPEATED ON THE SAME DAY, AND RECOVERED 10.6 UG/ML. USER IS NOT AWARE OF ANY PATIENT RESULTS HAVING BEEN REPEATED OR ERRONEOUS. THE FIELD SERVICE REPRESENTATIVE DETERMINED THE CAUSE TO BE POOR CELL RINSING DUE TO A FAILING RINSE WATER VALVE. HE REPLACED THE VALVE, ADJUSTED THE WATER LEVEL TO THE CELLS, ADJUSTED THE EXTERNAL PROBE WASHES, AND ADJUSTED THE SAMPLE PROBE. PERFORMANCE TESTS WERE PERFORMED.