MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH X3 TRIATHLON CS INSERT #3 11MM; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO

Model Number	5531-G-311-E
Medical Device Problem Code	Insufficient Device Problem Information (3190)
Health Effect - Clinical Code	Tissue Breakdown (2681)
Date of Event	07/08/2021
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Review of the device history records indicate devices were manufactured and accepted into final stock with no relevant reported discrepancies.There have been no other similar events for the lot referenced.It was noted that the device is not available for evaluation.Should additional information become available, it will be provided in a supplemental report upon completion of the investigation.
Event or Problem Description
Dr.Revised a left triathlon total knee.The original surgery the patella was not resurfaced.The patient subsequently felt a pop weeks later.Surgeon confirmed the arthrotomy and retinaculum were torn so he repaired the tissue, resurfaced the patella and changed the tibial insert from a 3x11 to a 3x9 to relieve stress on the patella during flexion.No signs of infection or allegations against the implants.

• Brand Name: X3 TRIATHLON CS INSERT #3 11MM
• Common Device Name: PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 12271546
• Report Number: 0002249697-2021-01304
• Device Sequence Number: 17408610
• Product Code: MBH
• UDI-Device Identifier: 07613327337013
• UDI-Public: 07613327337013
• Combination Product (Y/N): N
• Initial Reporter State: RI
• Initial Reporter Country: US
• PMA/510(K) Number: K172634
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2021
• Device Explanted Year: 2021
• Reporter Type: Manufacturer
• Report Source: health professional,other
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 08/03/2021

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Operator of Device: Health Professional
• Device Expiration Date: 08/31/2024
• Device Model Number: 5531-G-311-E
• Device Catalogue Number: 5531-G-311-E
• Device Lot Number: LJL777
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 07/08/2021
• Initial Report FDA Received Date: 08/03/2021
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Hospitalization; Required Intervention
• Patient Age: 75 YR