MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRIATHLON P/A CR BEADED #4R; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO

Model Number	5517-F-402
Medical Device Problem Code	Material Erosion (1214)
Health Effect - Clinical Code	Ambulation or Postural Difficulties (2544)
Date of Event	04/29/2021
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Reported event: an event regarding wear involving a triathlon femoral component was reported.The event was not confirmed.Method & results: product evaluation and results: the reported device was not returned however photographs were provided for review.The photographs note the following: photo provided showed a recently explanted femoral component, amount of in-growth was noted on the inner surface of the device, nothing else of note could be seen on the photograph provided.Clinician review: a review of the provided medical records by a clinical consultant stated the following comment: there is no documentation of the revision surgery other than the per.The x-rays provided show the femur is posteriorly subluxed in relation to the tibia confirming instability.The root cause of this can not be established from the limited information provided.Serial x-rays and the revision operative report would provide further insight in to the cause of this problem.Product history review: could not be performed as the device lot details were not provided.Complaint history review: could not be performed as the device lot details were not provided.Conclusions: the exact cause of the event could not be determined because insufficient information was provided.Further information such as pathology reports, pre- and post-operative x-rays and the primary operative report as well as patient history and follow-up notes are needed to complete the investigation for determining root cause.No further investigation for this event is possible at this time.If devices and / or additional information become available to indicate further evaluation is warranted, this record will be reopened.
Event or Problem Description
It was reported that the patient's right knee was revised after complaint of instability and dislocation.Initially, surgeon planned to do a poly exchange due to posterior wear of the poly.However, because the patient continued to walk on the knee for months, the poly wore through, the tibial baseplate became damaged, and the femoral component because scratched up.Significant metal debris was noted intra-operatively.The femoral component, insert, and baseplate were revised.Rep confirmed he can provide some pictures, and that otherwise, no further information will be released by the hospital or surgeon.

• Brand Name: TRIATHLON P/A CR BEADED #4R
• 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: 11869255
• Report Number: 0002249697-2021-00904
• Device Sequence Number: 16944540
• Product Code: MBH
• UDI-Device Identifier: 07613327040944
• UDI-Public: 07613327040944
• Combination Product (Y/N): N
• Initial Reporter State: PA
• Initial Reporter Country: US
• PMA/510(K) Number: K141056
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Explanted Year: 2021
• Reporter Type: Manufacturer
• Report Source: health professional,other
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 05/24/2021

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 Model Number: 5517-F-402
• Device Catalogue Number: 5517F402
• Device Lot Number: UNKNOWN
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 04/29/2021
• Initial Report FDA Received Date: 05/24/2021
• 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: 70 YR