MAUDE Adverse Event Report: SMITH & NEPHEW, INC. LGN CR HIGH FLEX XLPE SZ 5-6 9MM; PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/

Model Number	71453121
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Code	Joint Laxity (4526)
Date of Event	02/23/2021
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
(b)(4).
Event or Problem Description
It was reported that two years after a bilateral tka, the patient complained of instability on the left knee.Patient suffered from obesity, and had difficulty in holding the leg, assessing stability and hyperextension.A revision surgery was performed to explant a lgn cr high flex xlpe sz 5-6 9mm.The liner was replaced.Additional details have not been provided at this time.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, this case reports the patient underwent a revision surgery/insert exchange due to complaint of instability.Per email communication, the requested surgical reports and x-rays are not available.Therefore, the patient impact beyond the revision cannot be determined.Due to the limited information provided, no further clinical assessment is warranted at this time.Should additional clinically relevant documentation become available, the clinical/medical task may be re-opened.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.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 fit/sizing issue, lifetime of device or patient condition.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 CR HIGH FLEX XLPE SZ 5-6 9MM
• Common Device Name: PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/
• Manufacturer (Section D): SMITH & NEPHEW, INC.; 1450 brooks rd.; memphis TN 38116
• MDR Report Key: 11484444
• Report Number: 1020279-2021-02175
• Device Sequence Number: 11620748
• Product Code: JWH
• UDI-Device Identifier: 00885556033982
• UDI-Public: 00885556033982
• Combination Product (Y/N): N
• Initial Reporter Country: AS
• PMA/510(K) Number: K071071
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2019
• Device Explanted Year: 2021
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: company representative,foreig
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 07/22/2021

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: 71453121
• Device Catalogue Number: 71453121
• Device Lot Number: 18HM22654
• Was Device Available for Evaluation?: No
• Initial Date Received by Manufacturer: 02/23/2021
• Supplement Date Received by Manufacturer: 07/20/2021
• Initial Report FDA Received Date: 03/15/2021
• Supplement Report FDA Received Date: 07/22/2021
• 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