MAUDE Adverse Event Report: Roche Diagnostics cobas 6000 c501 module; CLINICAL CHEMISTRY ANALYZER

Catalog Number	04745914001
Medical Device Problem Code	Non Reproducible Results (4029)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	09/09/2026
Type of Reportable Event	Malfunction
Event or Problem Description
Roche diagnostics received a customer complaint regarding an allegedly discrepant sodium electrode result for a patient sample tested on a cobas c 501 module.The initial result was 180 mmol/l.The first repeat result was 140 mmol/l.The second repeat result, tested on another device, was 135 mmol/l.
Additional Manufacturer Narrative
The sodium electrode lot number and expiration date were requested, but not provided.The field service engineer replaced the sample probe, calibrated the gear pump, and replaced rinse station tubing and aspiration tips.Controls and routine patient testing were performed; the outcome was positive.The instrument was fully functional.The investigation determined the service actions resolved the issue.

• Brand Name: cobas 6000 c501 module
• Common Device Name: CLINICAL CHEMISTRY ANALYZER
• Manufacturer (Section D): Roche Diagnostics; 9115 hague road; indianapolis IN 46250 -045
• Manufacturer (Section G): Hitachi High Tech Corp.; 882 ichige hitachinaka; ibaraki 312-8 504; JA 312-8504
• Manufacturer Contact: natalie catton ; 9115 hague road; indianapolis, IN 46250
• MDR Report Key: 50896644
• Report Number: 1823260-2026-03949
• Device Sequence Number: 10711722
• Product Code: JJE
• UDI-Device Identifier: 04015630924707
• UDI-Public: 04015630924707
• Combination Product (Y/N): N
• Initial Reporter Country: IT
• PMA/510(K) Number: K060373
• 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): 09/25/2026

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 Catalogue Number: 04745914001
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: Yes
• Initial Date Received by Manufacturer: 09/09/2026
• Initial Report FDA Received Date: 09/25/2026
• Was Device Evaluated by Manufacturer? (Y/N): Yes
• 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
• Patient Sequence Number: 1
• Patient Sex: Unknown