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

Model Number	5552-L-381
Medical Device Problem Code	Unstable (1667)
Health Effect - Clinical Code	Joint Laxity (4526)
Date of Event	07/19/2021
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
It was noted that the device is not available for evaluation.If additional information is received, it will be provided in a supplemental report upon completion of the investigation.Review of the device history records indicate devices were manufactured and accepted into final stock with no reported discrepancies.There have been no other events for the lot referenced.Not returned.
Event or Problem Description
As reported: "dr.Revised a left knee due to patella instability.The tibia baseplate was not revised.All other components came out." a triathlon cr femoral component, triathlon cr x3 insert, and tritanium patella were revised to a ts femur, ps insert, and patella with a stem, cones, and augments.Per rep: there are no allegations against the revised liner or the robot used to complete the primary surgery.

• Brand Name: TRITANIUM PATELLA-ASYMMETRIC
• 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: 12311962
• Report Number: 0002249697-2021-01362
• Device Sequence Number: 4490462
• Product Code: MBH
• UDI-Device Identifier: 07613327013566
• UDI-Public: 07613327013566
• Combination Product (Y/N): N
• Initial Reporter State: LA
• Initial Reporter Country: US
• PMA/510(K) Number: K141056
• 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): 08/12/2021

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: 11/08/2025
• Device Model Number: 5552-L-381
• Device Catalogue Number: 5552-L-381
• Device Lot Number: MYKD1
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 07/19/2021
• Initial Report FDA Received Date: 08/12/2021
• 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
• Patient Weight: 127