MAUDE Adverse Event Report: ABBOTT MEDICAL MASTERS SERIES MECHANICAL HEART VALVE; HEART-VALVE, MECHANICAL

Model Number	25AJ-501
Medical Device Problem Code	Incomplete Coaptation (2507)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	03/18/2026
Type of Reportable Event	Malfunction
Additional Manufacturer Narrative
The device is not returning for evaluation.Investigation is not yet complete.A follow-up report will be submitted with all additional relevant information.
Event or Problem Description
It was reported that on (b)(6) 2026, a 25mm sjm masters series mechanical heart valve was chosen for an aortic valve replacement surgery.The leaflet function was tested using a mechanical heart valve leaflet tester (lt100).During the operation, when the valve was successfully implanted, the physician found that the valve leaflets were not opening properly due to the obstruction of tissue structure under the valve.So, the valve was removed and replaced by another 25mm sjm masters series mechanical heart valve while patient on bypass.The operation was finally completed, and the patient was in stable condition.There was prolonged the duration of cardiopulmonary bypass occlusion.

• Brand Name: MASTERS SERIES MECHANICAL HEART VALVE
• Common Device Name: HEART-VALVE, MECHANICAL
• Manufacturer (Section D): ABBOTT MEDICAL; 5050 nathan lane n; plymouth MN 55442
• Manufacturer (Section G): ABBOTT MEDICAL REG# 2648612; lot 20 b st caguas; caguas 00725 ; * 00725
• Manufacturer Contact: karen krouse ; 5050 nathan lane n; plymouth, MN 55442 ; 6517565400
• MDR Report Key: 24845660
• Report Number: 2135147-2026-02323
• Device Sequence Number: 12178367
• Product Code: LWQ
• UDI-Device Identifier: 05415067043054
• UDI-Public: (01)05415067043054(17)291110
• Combination Product (Y/N): N
• Initial Reporter Country: CH
• PMA/510(K) Number: P810002
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2026
• Device Explanted Year: 2026
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 06/03/2026

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: 25AJ-501
• Device Catalogue Number: 25AJ-501
• Device Lot Number: C00025465
• 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: 03/18/2026
• Supplement Date Received by Manufacturer: 05/31/2026
• Initial Report FDA Received Date: 04/10/2026
• Supplement Report FDA Received Date: 06/03/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 11/11/2024
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Age: 48 YR
• Patient Sex: Male
• Patient Weight: 75 KG