MAUDE Adverse Event Report: ROCHE DIAGNOSTICS ELECSYS T4; TOTAL THYROXINE ASSAY

Model Number	T4
Medical Device Problem Codes	Low Test Results (2458); Chemical Problem (2893)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Type of Reportable Event	Malfunction
Event or Problem Description
1.There was an allegation of questionable elecsys t4 results for 1 patient from the cobas e411 disk analyzer.2.Patient age range: asku.3.Patient weight range: asku.4.Patient sex breakdown: asku.5.Patient race breakdown: asku.6.Patient ethnicity breakdown: asku.
Additional Manufacturer Narrative
1.Summary of investigation results: the investigation is ongoing.2.Summary of follow up/corrective actions taken: the investigation is ongoing.3.Device returned to manufacturer? no.4.Device labeled "for single use?" no.5.Device reprocessed and reused? no.
Additional Manufacturer Narrative
1.Summary of investigation results: the investigation did not identify a product problem.From the information provided, a general reagent issue could be excluded.The differences generated between the different methods most likely relate to normal methodological differences.2.Summary of follow up/corrective actions taken: no follow up/corrective actions were taken.

• Brand Name: ELECSYS T4
• Common Device Name: TOTAL THYROXINE ASSAY
• Manufacturer (Section D): ROCHE DIAGNOSTICS; 9115 hague road; indianapolis IN 46250 0457
• Manufacturer (Section G): ROCHE DIAGNOSTICS GMBH; sandhofer strasse 116; mannheim (baden-wurttemberg) 68305 ; GM 68305
• Manufacturer Contact: amy nelson ; 9115 hague road; indianapolis, IN 46250
• MDR Report Key: 21275399
• Report Number: 1823260-2025-00289
• Device Sequence Number: 8504809
• Product Code: CDX
• UDI-Device Identifier: 07613336171660
• UDI-Public: 07613336171660
• Combination Product (Y/N): N
• PMA/510(K) Number: EXEMPT
• Exemption Number: VMSR
• Number of Events Summarized: 1
• Summary Report (Y/N): Y
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 02/03/2025

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?: No
• Device Model Number: T4
• Device Catalogue Number: 09007741190
• Device Lot Number: 805868
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: Not provided
• Supplement Date Received by Manufacturer: 01/29/2025
• Initial Report FDA Received Date: 01/30/2025
• Supplement Report FDA Received Date: 02/03/2025
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Patient Sex: Unknown