MAUDE Adverse Event Report: ROCHE DIAGNOSTICS ELECSYS FT4 IV; FREE THYROXINE

Model Number	FT4 IV
Medical Device Problem Code	False Positive Result (1227)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Type of Reportable Event	Malfunction
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.
Event or Problem Description
1.Describe the event: there was an allegation of non-reproducible results for one patient sample tested with elecsys ft4 iv on a cobas e 801 analytical unit.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
For the event: 1.Summary of investigation results: assays from different vendors can generate different values.The differences in values is related to the overall setups of the assays, the antibodies used, differences in reference materials/methods, and differences in the standardization methodology used.2.Summary of follow up/corrective actions taken: none.

• Brand Name: ELECSYS FT4 IV
• Common Device Name: FREE THYROXINE
• 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: 21275923
• Report Number: 1823260-2025-00292
• Device Sequence Number: 8439862
• Product Code: CEC
• UDI-Device Identifier: 07613336172780
• UDI-Public: 07613336172780
• Combination Product (Y/N): N
• PMA/510(K) Number: K220456
• 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): 02/13/2025

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: FT4 IV
• Device Catalogue Number: 09043284190
• Device Lot Number: 78843602
• 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: 01/30/2025
• Initial Report FDA Received Date: 01/30/2025
• Supplement Report FDA Received Date: 02/13/2025
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Patient Sex: Unknown