MAUDE Adverse Event Report: Tosoh Hi-Tec, Inc. AIA-360; Fluorometer, For Clinical Use

Model Number	AIA-360 IMMUNOASSAY ANALYZER
Medical Device Problem Code	Incorrect, Inadequate or Imprecise Result or Readings (1535)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/13/2026
Type of Reportable Event	Malfunction
Event or Problem Description
A customer reported failed american proficiency institute (api) second event proficiency testing for free triiodothyronine (ft3) on the aia-360 analyzer.Samples ch-06 and ch-10 failed, and no additional information has been provided.Tosoh quality laboratory participated in the american proficiency institute (api) second event proficiency testing for free triiodothyronine (ft3) and passed all results.A field service engineer (fse) was dispatched to address the reported event.There was no indication of any patient intervention or adverse health consequences due to the reported event.
Additional Manufacturer Narrative
The cause of the reported event has not been determined.The investigation is ongoing.

• Brand Name: AIA-360
• Common Device Name: Fluorometer, For Clinical Use
• Manufacturer (Section D): Tosoh Hi-Tec, Inc.; 1-37, fukugawa minami-machi; shunan, yamaguchi 74600 42; JA 7460042
• Manufacturer (Section G): Tosoh Hi-Tec, Inc.; 1-37, fukugawa minami-machi; shunan, yamaguchi 74600 42; JA 7460042
• Manufacturer Contact: janefrances ajiduah ; 2-2-1 yaesu; chuo-ku, tokyo 10400-28 ; JA 1040028 ; +1(650)636-8314
• MDR Report Key: 50189344
• Report Number: 3004529019-2026-00109
• Device Sequence Number: 6111422
• Product Code: KHO
• UDI-Device Identifier: 04560189282896
• UDI-Public: 04560189282896
• Combination Product (Y/N): N
• Initial Reporter State: UT
• Initial Reporter Country: US
• PMA/510(K) Number: K971103
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional
• Initial Reporter Occupation: Other Health Care Professional
• Type of Report: Initial
• Report Date (Section B): 08/09/2026

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 Model Number: AIA-360 IMMUNOASSAY ANALYZER
• Device Catalogue Number: 019945
• Device Lot Number: N/A
• Was Device Available for Evaluation?: Yes
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 07/13/2026
• Initial Report FDA Received Date: 08/10/2026
• Date Device Manufactured: 06/01/2023
• 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
• Usage of Device: Reuse
• Patient Sequence Number: 1
• Patient Sex: Unknown