MAUDE Adverse Event Report: BECKMAN COULTER INC. AU5800 CLINICAL CHEMISTRY ANALYZER; ANALYZER, CHEMISTRY (PHOTOMETRIC, DISCRETE), FOR CLINICAL USE

Model Number	AU5800-20 CHEMISTRY ANALYZER AU5800 AUTOMATION READY
Medical Device Problem Code	Incorrect, Inadequate or Imprecise Result or Readings (1535)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	04/04/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
A beckman coulter field service engineer (fse) was dispatched to the customer site to evaluate the au5800 clinical chemistry analyzer.The fse inspected the analyzer and performed multiple interventions.The fse proactively replaced buffer valves, ise tubing and probe as part of troubleshooting.Upon further troubleshooting, the fse determined cause of the erroneous results was due to malfunctioning ise data board.The fse replaced the ise data board which resolved the issue.The fse performed system verification successfully without issue.The system returned to normal operation.Section a2, a4, and a5: information not provided by customer.The beckman coulter identifier is (b)(4).
Event or Problem Description
The customer reported the au5800 clinical chemistry analyzer generated fourteen (14) false low sodium (na), and high chloride (cl) patient results with negative anion gap.The erroneous results were reported outside the laboratory and later corrected.There was no report of change to treatment, injury, or death associated to this event.The customer provide patient data for (14) patients.

• Brand Name: AU5800 CLINICAL CHEMISTRY ANALYZER
• Common Device Name: ANALYZER, CHEMISTRY (PHOTOMETRIC, DISCRETE), FOR CLINICAL USE
• Manufacturer (Section D): BECKMAN COULTER INC.; 250 s. kraemer blvd.; brea CA 92821
• Manufacturer (Section G): BECKMAN COULTER MISIMA K.K.; 454-32 higashino; nagaizumi-cho sunto-gun; schizuoka JP-NO TA 4; JA JP-NOTA 41
• Manufacturer Contact: shama agtey ; 1000 lake hazeltine drive; chaska, MN 55318 ; 9524916938
• MDR Report Key: 25059976
• Report Number: 9612296-2026-00189
• Device Sequence Number: 15791116
• Product Code: JJE
• UDI-Device Identifier: 14987666543023
• UDI-Public: (01)14987666543023(11)210715
• Combination Product (Y/N): N
• Initial Reporter State: IL
• Initial Reporter Country: US
• PMA/510(K) Number: K112412
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional,User Facility
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 05/01/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Device Model Number: AU5800-20 CHEMISTRY ANALYZER AU5800 AUTOMATION READY
• Device Catalogue Number: B96698
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 04/06/2026
• Initial Report FDA Received Date: 05/01/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 07/15/2021
• Is the Device Labeled for Single Use? (Y/N): No
• Usage of Device: Unknown
• Patient Sequence Number: 1
• Patient Sex: Unknown