MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRIATHLON CR FEM COMP #3 R-CEM; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO

Model Number	5510-F-302
Medical Device Problem Codes	Device Dislodged or Dislocated (2923); Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Codes	Pain (1994); Loss of Range of Motion (2032); Joint Dislocation (2374); Ambulation or Postural Difficulties (2544)
Date of Event	07/06/2011
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.An evaluation of the device cannot be performed as the device was not returned to the manufacturer.Should additional information become available it will be reported in a supplemental report upon completion of the investigation.
Event or Problem Description
Patient remained symptomatic and on (b)(6) 2011 underwent a procedure to correct patella maltracking and a manipulation.A lateral release was performed and the surgeon states that he watched it track ¿nicely¿ over the trochlear.Soft tissue releases on the medial side were carried out because he felt that when the lateral side healed it will heal in elongated position [this is his opinion - not a recognized phenomenon].After manipulation range of motion was -5 to 120°.
Event or Problem Description
Patient remained symptomatic and on (b)(6) 2011 underwent a procedure to correct patella maltracking and a manipulation.A lateral release was performed and the surgeon states that he watched it track ¿nicely¿ over the trochlear.Soft tissue releases on the medial side were carried out because he felt that when the lateral side healed it will heal in elongated position [this is his opinion - not a recognized phenomenon].After manipulation range of motion was -5 to 120°.
Additional Manufacturer Narrative
Reported event: an event regarding rom and dislocation (patella maltracking) involving a triathlon femoral component was reported.The event was confirmed via medical review.Method & results: -device evaluation and results: not performed as product remained implanted.-clinician review: a review of the provided medical records by a clinical consultant stated the following comment: patient underwent primary right total knee arthroplasty in 2011.Her knee was extremely stiff and a manipulation was carried out.The knee failed due to patellar subluxation/maltracking/instability with arthrofibrosis.The patient did not do well and had to undergo a second revision.Extreme malposition of the tibia was noted as well as of the femur.The revision was carried out with a totally stabilized implant.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 see no abnormality with the implant itself.The procedure failed due to technical issues such as soft tissue balancing and surgical technique.Operative technique, soft tissue balancing, and cementing technique are key in the longevity of a total knee replacement.Components must be adequately checked for proper position, alignment and rotation and ligament balancing must be carried out and the patella must track well without any external pressure.-device history review: all devices were manufactured and accepted into final stock with no relevant reported discrepancies.-complaint history review: there have been 2 other similar events for the reported lot that relate to rom for the same device/patient, therefore no further trending is required for this commonality.Conclusion: a review of the provided medical records by a clinical consultant stated the following comment: patient underwent primary right total knee arthroplasty in 2011.Her knee was extremely stiff and a manipulation was carried out.The knee failed due to patellar subluxation/maltracking/instability with arthrofibrosis.The patient did not do well and had to undergo a second revision.Extreme malposition of the tibia was noted as well as of the femur.The revision was carried out with a totally stabilized implant.If devices and / or additional information become available to indicate further evaluation is warranted, this record will be reopened.

• Brand Name: TRIATHLON CR FEM COMP #3 R-CEM
• 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: 12299335
• Report Number: 0002249697-2021-01344
• Device Sequence Number: 14445586
• Product Code: MBH
• UDI-Device Identifier: 07613327040265
• UDI-Public: 07613327040265
• 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: 2011
• Reporter Type: Manufacturer
• Report Source: consumer,other
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 09/02/2021

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: 06/30/2015
• Device Model Number: 5510-F-302
• Device Catalogue Number: 5510F302
• Device Lot Number: ST7JK
• Was Device Available for Evaluation?: No
• Initial Date Received by Manufacturer: 07/16/2021
• Supplement Date Received by Manufacturer: 08/13/2021
• Initial Report FDA Received Date: 08/10/2021
• Supplement Report FDA Received Date: 09/02/2021
• 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: 46 YR