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	02/24/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The analyzer serial number is (b)(6).The investigation is ongoing.
Event or Problem Description
There was an allegation of questionable sodium electrode (na), potassium electrode (k), and ise indirect na-k-cl for gen.2 (cl) results for 1 patient sample on a cobas 6000 c (501) module.This medwatch will cover chloride.Refer to medwatch with a1 patient identifier (b)(6) for information on the sodium results and medwatch with a1 patient identifier (b)(6) for information on the potassium results.The initial na result was 123 mmol/l, the initial k result was 3.42 mmol/l, and the initial cl result was 116.9 mmol/l.The customer questioned the results as they were accompanied by a negative ion gap which prompted them to repeat the results.The repeat na result was 137 mmol/l, the repeat k result was 4.21 mmol/l, and the repeat cl result was 102.5 mmol/l.No questionable results were reported outside of the laboratory.The repeat results were deemed correct.
Additional Manufacturer Narrative
Section d product information has been updated, as well as g1 manufacturing site and g4.The calibration and qc recovery data provided was within specification.The alarm trace did not contain a conspicuous event.The field service engineer (fse) found salt buildup on the acrylic block and cleaned it.A precision check and qc were performed successfully.The service maintenance actions performed by the fse resolved the issue.No further issues were reported after the service visit.

• 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: 24626127
• Report Number: 1823260-2026-00966
• Device Sequence Number: 8985775
• Product Code: JJE
• UDI-Device Identifier: 07613336227787
• UDI-Public: 07613336227787
• Combination Product (Y/N): N
• Initial Reporter State: IA
• 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): 04/15/2026

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: 02/24/2026
• Supplement Date Received by Manufacturer: 03/23/2026
• Initial Report FDA Received Date: 03/18/2026
• Supplement Report FDA Received Date: 04/15/2026
• 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 Age: 64 YR
• Patient Sex: Male
• Patient Weight: 76 KG