MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRIATHLON ASYMMETRIC X3 PATELLA; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO

Model Number	5551-G-320
Medical Device Problem Code	Unstable (1667)
Health Effect - Clinical Codes	Injury (2348); Ambulation or Postural Difficulties (2544)
Date of Event	11/04/2016
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.The information in this report was provided by stryker orthopaedics legal affairs department.No additional information is available at this time due to the ongoing litigation.Should additional information become available, the evaluation summary will be submitted in a supplemental report.Product not returned.
Event or Problem Description
It was reported through the communication of an attorney that allegedly the patient was revised due to "instability of the left knee".
Event or Problem Description
It was reported through the communication of an attorney that allegedly the patient was revised due to "instability of the left knee.".
Additional Manufacturer Narrative
Reported event: an event regarding instability involving a triathlon patella was reported.The event was confirmed by medical review.Method & results: product evaluation and results: material analysis, visual, functional and dimensional inspections could not be performed as the device was not returned.Medical records received and evaluation: a review of the provided medical records by a clinical consultant indicated: i can confirm that the event occurred since i was able to review the operation reports and i reviewed pre op and post op x-rays.Regarding the possible root cause of this event, i cannot determine this for certain.I don¿t see any abnormality with the implant itself.The development of postoperative instability is a well-known complication.Operative technique, soft tissue balancing as well as activity level and body habitus are key in the longevity of a total knee replacement.Product history review: a review of the device manufacturing records indicate that all devices accepted into final stock were free from discrepancies.Complaint history review: there have been no other similar events for the lot referenced.Conclusions: the exact cause of the event could not be determined because insufficient information was provided.Additional information including operative reports, progress notes, x-rays and return of the device are needed to fully investigate the event.If further information becomes available or the product is returned, this investigation will be re-opened.

• Brand Name: TRIATHLON ASYMMETRIC X3 PATELLA
• 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: 8506486
• Report Number: 0002249697-2019-01592
• Device Sequence Number: 1571432
• Product Code: MBH
• UDI-Device Identifier: 07613327014815
• UDI-Public: 07613327014815
• Combination Product (Y/N): N
• Initial Reporter State: NJ
• Initial Reporter Country: US
• PMA/510(K) Number: K141056
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2012
• Device Explanted Year: 2016
• Reporter Type: Manufacturer
• Report Source: other
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 09/22/2021

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: 06/30/2017
• Device Model Number: 5551-G-320
• Device Catalogue Number: 5551-G-320
• Device Lot Number: Y99X
• Was Device Available for Evaluation?: No
• Initial Date Received by Manufacturer: 03/15/2019
• Supplement Date Received by Manufacturer: 08/30/2021
• Initial Report FDA Received Date: 04/11/2019
• Supplement Report FDA Received Date: 09/22/2021
• 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: 65 YR