MAUDE Adverse Event Report: ROCHE DIAGNOSTICS COBAS 8000 COBAS C 502 MODULE; CLINICAL CHEMISTRY ANALYZER

Catalog Number	05964067001
Medical Device Problem Code	High Test Results (2457)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	02/18/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The cobas 8000 cobas c 502 module serial number was (b)(6).The investigation is ongoing.
Event or Problem Description
There was an allegation of questionable results from the cobas 8000 cobas c 502 module.Of the data provided, one example was a reportable malfunction.The initial result was 6.84% and the repeat result on (b)(6) 2026 using a cobas c501 analyzer was 6.29% with a data flag.
Additional Manufacturer Narrative
Medwatch fields d1-d4, g1, and g4 were updated.General reagent issues were excluded, as the result believed to be correct was obtained using the same reagent.Due to the limited information provided, the investigation was unable to determine a specific root cause.

• Brand Name: COBAS 8000 COBAS C 502 MODULE
• Common Device Name: CLINICAL CHEMISTRY ANALYZER
• Manufacturer (Section D): ROCHE DIAGNOSTICS; 9115 hague road; indianapolis IN 46250 0457
• 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 46250-0457
• MDR Report Key: 24575807
• Report Number: 1823260-2026-00869
• Device Sequence Number: 18725753
• Product Code: JJE
• UDI-Device Identifier: 04015630928354
• UDI-Public: 04015630928354
• Combination Product (Y/N): N
• Initial Reporter Country: SA
• PMA/510(K) Number: K100853
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,User Facility
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial,Followup
• Report Date (Section B): 04/03/2026

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: 05964067001
• Device Lot Number: 86039501
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Follow-Up
• Initial Date Received by Manufacturer: 02/18/2026
• Supplement Date Received by Manufacturer: 03/17/2026
• Initial Report FDA Received Date: 03/11/2026
• Supplement Report FDA Received Date: 04/03/2026
• 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