MAUDE Adverse Event Report: Beckman Coulter, Inc. AU5800 Chemistry Analyzer; Analyzer, Chemistry (Photometric, Discrete), For Clinical Use

Model Number	AU5800-10 CHEMISTRY ANALYZER AU5800
Medical Device Problem Code	Low Test Results (2458)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	09/07/2026
Type of Reportable Event	Malfunction
Event or Problem Description
The customer reported the generation of erroneously low ion-selective electrolytes (ise) patient results, including sodium (na), chloride (cl) and potassium (k), on their au5800 clinical chemistry analyzer.There was no report of change to treatment, injury, or death associated with event.The customer did not provide patient data or demographics.
Additional Manufacturer Narrative
Beckman coulter field service engineer (fse) evaluated the au5800 chemistry analyzer and identified the probable cause as multiple hardware.The fse replaced the 3-way valve, buffer valve and water inlet tubing to resolve the issue.System performance was verified and the customer was satisfied.Section a2, a3, a4, a5 and a6: information not provided by customer.Section e1, initial reporter telephone number is (b)(6).The beckman coulter internal identifier is (b)(4).

• Brand Name: AU5800 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 Mishima 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 92821 ; +1(952)491-6938
• MDR Report Key: 50808422
• Report Number: 9612296-2026-00349
• Device Sequence Number: 20996061
• Product Code: JJE
• UDI-Device Identifier: 14987666543016
• UDI-Public: (01)14987666543016(11)240619
• Combination Product (Y/N): N
• Initial Reporter Country: FR
• PMA/510(K) Number: K112412
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,User Facility
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 09/17/2026

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
• Operator of Device: Health Professional
• Device Model Number: AU5800-10 CHEMISTRY ANALYZER AU5800
• Device Catalogue Number: B96697
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 09/07/2026
• Initial Report FDA Received Date: 09/17/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• Date Device Manufactured: 06/19/2024
• Is the Device Labeled for Single Use? (Y/N): No
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Unknown
• Patient Sequence Number: 1
• Patient Sex: Unknown