MAUDE Adverse Event Report: SMITH & NEPHEW, INC. LGN OX CONSTRAINED FEM 6 LT; PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED,

Model Number	71421166
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Codes	Unspecified Infection (1930); Pain (1994); Swelling/ Edema (4577)
Date of Event	01/05/2021
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
(b)(4).
Event or Problem Description
It was reported that, a revision surgery was performed due to pain, swelling, and infection.Legion oxinium constrained fem 6 leftwas explanted.However, the doctor said that the devices were not defective.The procedure was completed using a back-up device.It is unknown if there was a delay.No complications were reported.No patient information neither medical reports are available.All available information has been disclosed.If additional information should become available, a supplemental report will be submitted accordingly.
Additional Manufacturer Narrative
The device, used in treatment, was not returned for evaluation and the reported event could not be confirmed.The clinical/medical investigation concluded that, per complaint details, a revision surgery was performed due to pain, swelling, and infection.It was communicated that the requested medical documentation was not available for inclusion in the medical investigation and the ¿doctor said that the device was not defective¿.Reportedly, the root cause of the revision was the infection; however, the source of the unspecified infection remains unknown.The patient impact beyond the reported symptoms and subsequent revision could not be fully assessed.No further medical assessment is warranted at this time.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 did not reveal additional complaints for the listed batch.A review of the risk management file and instructions for use documents revealed this failure mode was previously identified.A review of the sterilization records revealed the batch was sterilized within normal parameters.At this time, we have no reason to suspect that the product failed to meet any product specifications at the time of manufacture.Possible causes could include but not limited to traumatic injury, joint tightness, material in use, patient reaction, loss of sterility or post-operative healing issue.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.

• Brand Name: LGN OX CONSTRAINED FEM 6 LT
• Common Device Name: PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED,
• Manufacturer (Section D): SMITH & NEPHEW, INC.; 1450 brooks rd.; memphis TN 38116
• MDR Report Key: 11235708
• Report Number: 1020279-2021-00658
• Device Sequence Number: 11648668
• Product Code: JWH
• UDI-Device Identifier: 03596010543851
• UDI-Public: 03596010543851
• Combination Product (Y/N): N
• Initial Reporter Country: JA
• PMA/510(K) Number: K043440
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2020
• Device Explanted Year: 2021
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: company representative,foreig
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 07/07/2021

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: 71421166
• Device Catalogue Number: 71421166
• Device Lot Number: 18JM01005
• Initial Date Received by Manufacturer: 01/05/2021
• Supplement Date Received by Manufacturer: 07/06/2021
• Initial Report FDA Received Date: 01/27/2021
• Supplement Report FDA Received Date: 07/07/2021
• 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