MAUDE Adverse Event Report: SMITH & NEPHEW, INC. LGN PS HIGH FLEX XLPE SZ 1-2 11MM; PROSTHESIS,KNEE,PATELLOFEMOROTIBIAL,SEMICONSTRAINED,CEMENTED,POLYMERMETAL

Model Number	71453202
Medical Device Problem Code	Break (1069)
Health Effect - Clinical Codes	Pain (1994); Ambulation or Postural Difficulties (2544); Inadequate Osseointegration (2646); Metal Related Pathology (4530); Swelling/ Edema (4577)
Date of Event	09/24/2021
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Internal complaint reference case-(b)(4).
Event or Problem Description
It was reported that, after a tkr surgery had been performed on (b)(6) 2017, the patient experienced right knee pain and effusion.This adverse event was treated by doing a wound debridement on (b)(6) 2021.During the said procedure, the surgeon found signs of metallosis.A revision surgery was performed on (b)(6) 2021 due to metallosis and implant loosening.During this procedure, the femoral component, insert and tibial component were explanted from the patient.Currently the patient condition is stable after revision surgery and is in the process of recovery.
Additional Manufacturer Narrative
H3, h6: the associated device was returned and evaluated.The contribution of the device to the reported event could not be corroborated.A visual inspection of the returned device did not confirm the stated failure mode.A review of complaint history did not reveal similar events for the listed batch and part number.The clinical/medical evaluation concluded that the diagnosis of ¿metallosis over right knee with implant loosening¿ along with the reported symptoms led to the revision; however, the root cause of the loosening and metallosis could not be definitively concluded, although a disassociated and wear of the insert could not be ruled out as a contributing factor to the reported events.The assessed patient impact included the reported symptoms, diagnoses, and prbc transfusion.Further patient impact could not be assessed.No further medical assessment could be rendered 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.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.A review of sterilization documents indicated that the product was sterilized according to sterilization release documentation.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.Some potential probable causes for this event could include damaged product, material in use, and patient allergy.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.
Additional Manufacturer Narrative
H3, h6: the associated device was returned and evaluated.A contribution of the manufacturing process to the reported event could not be corroborated.A visual inspection of the returned device did confirm the stated failure mode.The device is worn along its entire surface and is broken on the majority of one side.This could be due to friction with the other mating devices.The cause of the incident could not be concluded.A review of complaint history did not reveal similar events for the listed batch and part number.The clinical/medical evaluation concluded that the diagnosis of ¿metallosis over right knee with implant loosening¿ along with the reported symptoms led to the revision; however, the root cause of the loosening and metallosis could not be definitively concluded, although a disassociated and wear of the insert could not be ruled out as a contributing factor to the reported events.The assessed patient impact included the reported symptoms, diagnoses, and prbc transfusion.Further patient impact could not be assessed.No further medical assessment could be rendered 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.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.A review of sterilization documents indicated that the product was sterilized according to sterilization release documentation.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.Some potential probable causes for this event could include but are not limited to disassociation, improper size used, and abnormal loading of limb.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.
Additional Manufacturer Narrative
H10: the associated device was returned and evaluated.A visual inspection of the returned device did confirm the stated failure mode.The device is worn along its entire surface and is broken on the majority of one side.This could be due to friction with the other mating devices.The cause of the incident could not be concluded.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 diagnosis of ¿metallosis over right knee with implant loosening¿ along with the reported symptoms led to the revision; however, the root cause of the loosening and metallosis could not be definitively concluded, although a disassociated and wear of the insert could not be ruled out as a contributing factor to the reported events.The assessed patient impact included the reported symptoms, diagnoses, and prbc transfusion.Further patient impact could not be assessed.No further medical assessment could be rendered at this time.The scratching on the anterior flange and cement adhesion surface of the femur is likely due to explantation.The scratching and wear on the condyles are likely due to contact with the tibial baseplate during flexion.This examination also showed deformation of the anterior side of the post, anterior lock detail, and posterior lock detail as well as wear of the posterior and superior surfaces of the tibial insert.The deformation of the anterior side of the post is likely due contact with the femur.The deformation of the anterior lock detail indicates that the tibial insert was likely not fully seated into the tibial baseplate.The deformation of both the posterior lock detail as well as the wear on the posterior and superior surface of the tibial insert indicate that the insert likely became disassociated from the baseplate.Following the disassociation of the insert, repetitive contact with the femoral component likely caused the damage observed on the tibial insert.Lastly, the examination showed scratching of the superior and anterior surfaces as well as wear on the posterior edge of the superior surface of the tibial baseplate.The scratching of the superior and anterior sur faces of the tibial baseplate were likely due to explantation.The wear on the posterior edge of the superior surface was likely caused by contact with the femur.I was also noted that a size 5 femur was used with a size 1-2 tibial insert which is not a recommended combination in the smith + nephew compatibility chart.No material or manufacturing deviations were observed during the investigation of this device.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.A review of sterilization documents indicated that the product was sterilized according to sterilization release documentation.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.A contribution of the manufacturing process to the reported event could not be corroborated.Some potential probable causes for this event could include tibial insert not being fully seated into the baseplate, sizes of the devices used, material in use, and patient reaction.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.Internal complaint reference number: (b)(4).

• Brand Name: LGN PS HIGH FLEX XLPE SZ 1-2 11MM
• Common Device Name: PROSTHESIS,KNEE,PATELLOFEMOROTIBIAL,SEMICONSTRAINED,CEMENTED,POLYMERMETAL
• 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: 13010619
• Report Number: 1020279-2021-08673
• Device Sequence Number: 1893615
• Product Code: JWH
• UDI-Device Identifier: 00885556034316
• UDI-Public: 00885556034316
• Combination Product (Y/N): N
• Initial Reporter Country: IN
• PMA/510(K) Number: K071071
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2017
• Device Explanted Year: 2021
• Reporter Type: Manufacturer
• Report Source: Other,Foreign,Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup,Followup,Followup
• Report Date (Section B): 04/25/2022

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?: No
• Operator of Device: Health Professional
• Device Model Number: 71453202
• Device Catalogue Number: 71453202
• Device Lot Number: 17DT86462
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 12/08/2021
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 10/28/2021
• Supplement Date Received by Manufacturer: 01/14/2022; 01/19/2022; 04/25/2022
• Initial Report FDA Received Date: 12/15/2021
• Supplement Report FDA Received Date: 01/17/2022; 01/20/2022; 04/25/2022
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 04/25/2017
• 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: A
• Patient Sequence Number: 1
• Patient Age: 50 YR
• Patient Sex: Female