MAUDE Adverse Event Report: SMITH & NEPHEW, INC. LEGION PS OXIN FEM SZ4 LT; PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL

Model Number	71421214
Medical Device Problem Code	Loosening of Implant Not Related to Bone-Ingrowth (4002)
Health Effect - Clinical Codes	Failure of Implant (1924); Inadequate Osseointegration (2646); No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	08/04/2022
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Internal complaint reference (b)(4).
Event or Problem Description
It was reported that, after a tka surgery had been performed on (b)(6) 2020, the patient experienced loosening of the legion ps oxin fem sz4 lt.This adverse event was resolved by performing a revision surgery on (b)(6) 2022, in which the femoral component, the insert and the tibial baseplate were explanted and exchanged wih s+n implants.Patient's current health status is unknown.
Additional Manufacturer Narrative
Additional information: d8, d10, h3, h6 (component code, type of investigation, investigation findings, investigation conclusions).Results of investigation: the device was not returned for evaluation and the reported event could not be confirmed.The clinical/medical investigation concluded that, as of the date of this medical investigation, the requested clinical documentation has not been provided; therefore, there were no clinical factors found which would have contributed to the event.According to the report, this adverse was resolved after the surgeon removed all of the implants and revision was performed.The impact to the patient beyond the reported loosening and subsequent revision, cannot be confirmed nor concluded based on the information provided.Should any additional relevant medical information be provided, this case would be re-assessed.A review of the manufacturing records did not reveal a manufacturing abnormality that could have caused or contributed to the reported incident.A review of complaint history for the part number over the past 12 months and for the batch number based on historical data of the device did not reveal similar events for the listed device.A review of the instructions for use documents for knee systems revealed that looseness of components has been identified in possible adverse effects section as a result from trauma, improper implant selection, improper implant positioning, improper fixation, and/or migration of the components.Muscle and fibrous tissue laxity can also contribute to these conditions.A review of the risk management file revealed this failure mode was previously identified.The anticipated risk level is still adequate.A historical review concluded that there are no prior actions related to this product and event.At this time, we have no reason to suspect that the product failed to meet any product specifications at the time of manufacture.Factors and/or potential causes that could contribute to the reported event include abnormal motion over time, bone degeneration, appropriate size selected, lack of ingrowth, osteolysis and/or traumatic injury.The contribution of the device to the reported event could not be corroborated.Based on this investigation, the need for corrective action is not indicated.Without the return of the actual product involved, our investigation could not proceed.Should the device or additional information be received, the complaint will be reopened.No further investigation is warranted for this complaint; however, we will continue to monitor for future complaints and investigate as necessary.We consider this investigation closed.Corrected data: h6 (health effect - clinical code).

• Brand Name: LEGION PS OXIN FEM SZ4 LT
• Common Device Name: PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL
• Manufacturer (Section D): SMITH & NEPHEW, INC.; 1450 brooks rd.; memphis TN 38116
• Manufacturer (Section G): SMITH & NEPHEW, INC.; 1450 brooks rd.; memphis TN 38116
• Manufacturer Contact: holly topping ; 7000 west william cannon drive; austin, TX 78735 ; 5123913905
• MDR Report Key: 15294248
• Report Number: 1020279-2022-03845
• Device Sequence Number: 2594941
• Product Code: JWH
• UDI-Device Identifier: 00885556029121
• UDI-Public: 00885556029121
• Combination Product (Y/N): N
• Initial Reporter State: MO
• Initial Reporter Country: US
• PMA/510(K) Number: K043440
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2020
• Device Explanted Year: 2022
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Health Professional,User Facility
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 09/30/2022

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?: Yes
• Operator of Device: Health Professional
• Device Model Number: 71421214
• Device Catalogue Number: 71421214
• Device Lot Number: 20AM04405
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 08/04/2022
• Supplement Date Received by Manufacturer: 09/29/2022
• Initial Report FDA Received Date: 08/25/2022
• Supplement Report FDA Received Date: 10/01/2022
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 01/06/2020
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Concomitant Medical Products and Therapy/Usage Dates: PN: 71420164 / LOT: H2003138; PN: 71420568 / LOT:19KM15327; PN: 71453173 / LOT:19EM16532
• Outcome Attributed to Adverse Event: Required Intervention
• Patient Sex: Female