MAUDE Adverse Event Report: ROCHE DIAGNOSTICS COBAS 6000 C (501) MODULE; CLINICAL CHEMISTRY ANALYZER

Catalog Number	05860636001
Medical Device Problem Codes	Incorrect Measurement (1383); Incorrect, Inadequate or Imprecise Result or Readings (1535)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	03/26/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The serial number of the c 501 analyzer is (b)(6).The field service engineer walked the customer through performing an air purge, reagent priming, and ise checks.Calibration and controls were run and these passed.The investigation is ongoing.
Event or Problem Description
The initial reporter stated they received discrepant sodium electrode results for one patient sample tested on a cobas 6000 c (501) module.A physician questioned the initial result.The customer then ran controls on the analyzer and these were outside of range low.The sample was repeated on a second analyzer.The sample initially resulted in a sodium value of 128 mmol/l and it repeated as 134 mmol/l.The repeat value was deemed correct and a corrected report was issued.
Additional Manufacturer Narrative
Calibration and control data showed no problems.A review of alarm trace data showed several abnormal aspiration alarms near the time the event occurred.The investigation determined the issue is consistent with insufficient pre-analytic sample handling.No further issues were reported after the service actions were performed.Medwatch fields d1, d2 d4, g1, and g4 have been updated.

• Brand Name: COBAS 6000 C (501) 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: 24858022
• Report Number: 1823260-2026-01400
• Device Sequence Number: 10488736
• Product Code: JJE
• UDI-Device Identifier: 07613336227763
• UDI-Public: 07613336227763
• Combination Product (Y/N): N
• Initial Reporter State: AZ
• Initial Reporter Country: US
• PMA/510(K) Number: K060373
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Health Professional,User Facility
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial,Followup
• Report Date (Section B): 05/07/2026

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: 05860636001
• Device Lot Number: ASKU
• 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: 03/26/2026
• Supplement Date Received by Manufacturer: 04/15/2026
• Initial Report FDA Received Date: 04/13/2026
• Supplement Report FDA Received Date: 05/07/2026
• 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