MAUDE Adverse Event Report: SMITH & NEPHEW, INC. LGN PS HIGH FLEX XLPE SZ 1-2 9MM; PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL

Model Number 71453201

Device Problem Migration or Expulsion of Device (1395)

Patient Problem Joint Laxity (4526)

Event Date 08/18/2022

Event Type  Injury  

Event Description

It was reported that, after a tka had been performed on (b)(6) 2021, the patient experienced disassociation of the poly.This adverse event was addressed by revision surgery on (b)(6) 2022, to exchange the lgn ps high flex xlpe sz 1-2 9mm.Patient's current health status is unknown.

Manufacturer Narrative

(b)(4).

Manufacturer Narrative

H3, h6.The associated device was returned and evaluated.A visual inspection of the returned device did not confirm the stated failure mode.The device was found to be slightly discolored from exposure to bodily fluids.A small portion of the base is also damaged.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.The clinical/medical evaluation concluded that the patient experienced a disassociation of the poly insert.This adverse event was addressed by revision surgery, to exchange the lgn ps high flex xlpe sz 1-2 9mm.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.The patient's current condition is unknown, and the patient impact could not be determined based on the limited information provided.Should any additional clinical information be provided, this complaint will be re-evaluated.A review of the manufacturing records did not reveal a manufacturing abnormality that could have caused or contributed to the reported incident.At this time, we do not have reason to suspect that the product failed to meet any product specifications at the time of manufacture.A review of the risk management file and instructions for use document revealed this failure mode was previously identified.The anticipated risk level is still adequate.Assessment of historical escalated cases concluded that there are no prior actions related to this device and failure mode.The contribution of the device to the reported event could not be corroborated.Factors that could contribute to the reported event include bone degeneration, lack of ingrowth, surgical technique, patient anatomy, abnormal loading and/or traumatic injury.Based on this investigation, the need for corrective action is not indicated.Should additional information be received, the complaint will be reopened.No further investigation is warranted for this complaint; however, we will continue to monitor future complaints and investigate as necessary.We consider this investigation closed.

Manufacturer Narrative

The associated device was returned and evaluated.A visual inspection of the returned device did not confirm the stated failure mode.The device was found to be slightly discolored from exposure to bodily fluids.A small portion of the base is also damaged.The lab analysis concluded that the purpose of this investigation was to examine the returned device.No destructive analysis was conducted.Damage/deformation was observed on the distal surface and posterior lock detail and the anterior lock detail of the insert.Burnishing, likely due to contact with the femoral component during service, was observed on the post.Damage/deformation of the lock is consistent with the insert not being properly engaged during the duration of service.Whether the insert became disengaged during service or was not fully engaged at initial implantation could not be definitively determined during this investigation.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.The clinical/medical evaluation concluded that the patient experienced a disassociation of the poly insert.This adverse event was addressed by revision surgery, to exchange the lgn ps high flex xlpe sz 1-2 9mm.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.The patient's current condition is unknown, and the patient impact could not be determined based on the limited information provided.Should any additional clinical information be provided, this complaint will be re-evaluated.A review of the manufacturing records did not reveal a manufacturing abnormality that could have caused or contributed to the reported incident.At this time, we do not have reason to suspect that the product failed to meet any product specifications at the time of manufacture.A review of the risk management file and instructions for use document revealed this failure mode was previously identified.The anticipated risk level is still adequate.Assessment of historical escalated cases concluded that there are no prior actions related to this device and failure mode.The contribution of the device to the reported event could not be corroborated.Factors that could contribute to the reported event include bone degeneration, lack of ingrowth, surgical technique, patient anatomy, abnormal loading and/or traumatic injury.Based on this investigation, the need for corrective action is not indicated.Should additional information be received, the complaint will be reopened.No further investigation is warranted for this complaint; however, we will continue to monitor future complaints and investigate as necessary.We consider this investigation closed.

• Brand Name: LGN PS HIGH FLEX XLPE SZ 1-2 9MM
• Type of Device: 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: 15380848
• MDR Text Key: 299487248
• Report Number: 1020279-2022-04014
• Device Sequence Number: 1
• Product Code: JWH
• UDI-Device Identifier: 00885556033784
• UDI-Public: 00885556033784
• Combination Product (y/n): N
• Reporter Country Code: US
• PMA/PMN Number: K071071
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Health Professional,User Facility
• Reporter Occupation: Physician
• Type of Report: Initial,Followup,Followup
• Report Date: 01/25/2023

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
• Device Operator: Health Professional
• Device Model Number: 71453201
• Device Catalogue Number: 71453201
• Device Lot Number: 21BM14974
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 09/07/2022
• Is the Reporter a Health Professional?: Yes
• Initial Date Manufacturer Received: 08/18/2022
• Initial Date FDA Received: 09/08/2022
• Supplement Dates Manufacturer Received: 10/07/2022; 01/24/2023
• Supplement Dates FDA Received: 10/12/2022; 01/25/2023
• Was Device Evaluated by Manufacturer?: Device Not Returned to Manufacturer
• Date Device Manufactured: 02/26/2021
• Is the Device Single Use?: Yes
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Initial
• Patient Sequence Number: 1
• Patient Outcome(s): Required Intervention
• Patient Sex: Female