MAUDE Adverse Event Report: BIOMET UK LTD. OXF TWIN-PEG CMNTD FEM MD PMA; OXFORD PARTIAL KNEE SYSTEM

Model Number N/A

Device Problems Insufficient Information (3190); Appropriate Term/Code Not Available (3191)

Patient Problems Arthritis (1723); Pain (1994)

Event Date 06/03/2020

Event Type  Injury  

Manufacturer Narrative

(b)(4).Customer has indicated that the product is in process of being returned to zimmer biomet for investigation.Concomitant medical products: medical product: oxf uni tib tray sz c rm pma, catalog #: 154723, lot #: 2945690.Medical product: oxf anat brg rt md size 5 pma, catalog #: 159577, lot #: 2695414.Multiple mdr reports were filed for this event, please see associated reports: 3002806535-2020-00296, 3002806535-2020-00297.The investigation is in process.Once the investigation has been completed, a follow-up mdr will be submitted.

Event Description

It was reported that a patient underwent an initial right knee arthroplasty.Subsequently, a revision procedure was performed.Reason for revision: needed revision because patient was having pain - arthritis progressed to lateral compartment.Components were well fixed, no sign of any looseness.

Event Description

It was reported that a patient underwent an initial right knee arthroplasty.Subsequently, a revision procedure was performed.Reason for revision: needed revision because patient was having pain - arthritis progressed to lateral compartment.Components were well fixed, no sign of any looseness.

Manufacturer Narrative

(b)(4).Multiple mdr reports were filed for this event, please see associated reports: 3002806535-2020-00296-1, 3002806535-2020-00297-1.Products have been returned to biomet uk ltd for evaluation and forwarded to the complaints product evaluation engineer for investigation.A right oxford partial knee system was revised after approximately 7 years and 1 month.All components were received for evaluation.The available relevant manufacturing history records indicate that the item was manufactured in accordance with the applicable specifications.Extensive and uneven wear and damage was observed on the polyethylene bearing, with damage to the inferior articulating surface indicating that the component may have been overhanging form the medial edge of the tibial tray, and articulating against it.The thickness of the central portion of the bearing was found to be 0.35 mm below the nominal dimension, suggesting a wear rate of approximately 0.05 mm/year, which is higher than the rate of 0.01 mm/year normally observed for well-functioning oxford bearings.It is unclear if the tracking of the meniscal bearing against the medial edge of the tibial component, and its consequent high wear rate, may have contributed to the patient reported pain and early revision, along with the reported progression of arthritis.The exact root cause cannot be confirmed without provision of radiographs and surgical notes.These have been requested but were not made available by the hospital.The available mhr reviews indicates that the product was most likely conforming to design specification when it left zimmer biomet control, however it is not possible to confirm the root cause of the revision with the information available.A review of the complaint database over the last 3 years has found 24 similar complaints reported with the item 161469,4 similar complaints reported with the item 159577 and 9 similar complaints reported with the item 161469.A review of the complaint database over the last 3 years has found no similar complaints reported with these item and lot combination.Risk assessment: risk management report documents the estimated residual risk associated with the reported event.The root cause of this complaint could not be determined with the information provided to date.Therefore, a line relating to a specific hazard could not be selected for assessment.The reported event states revision due to pain.Pain is documented as a potential harm as an outcome of a number of hazards assessed by the above referenced rmf.Pain is considered a severity of 3: moderate, which as per the severity table listed within the rmr is defined as prescribed medical or surgical intervention to preclude permanent impairment of a body function or body structure.Contributed to minor, temporary, or medically reversible injury.The event also reports revision due disease progression, which is not device related.The reported event is considered to be within the severity of the rmf.No corrective or preventive actions are considered necessary at this time.If any further information is found which would change or alter any conclusions or information, a supplemental will be filed accordingly.Zimmer biomet will continue to monitor for trends.

• Brand Name: OXF TWIN-PEG CMNTD FEM MD PMA
• Type of Device: OXFORD PARTIAL KNEE SYSTEM
• Manufacturer (Section D): BIOMET UK LTD.; waterton industrial estates; bridgend CF31 3XA; UK CF31 3XA
• MDR Report Key: 10205254
• MDR Text Key: 201097732
• Report Number: 3002806535-2020-00298
• Device Sequence Number: 1
• Product Code: NRA
• UDI-Device Identifier: 05019279438242
• UDI-Public: 05019279438242
• Combination Product (y/n): N
• PMA/PMN Number: P010014
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: company representative,health
• Type of Report: Initial,Followup
• Report Date: 11/06/2020

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 06/29/2020
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Health Professional
• Device Expiration Date: 01/31/2023
• Device Model Number: N/A
• Device Catalogue Number: 161469
• Device Lot Number: 2950692
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 06/15/2020
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 11/03/2020
• Is This a Reprocessed and Reused Single-Use Device?: No
• Removal/Correction Number: N/A
• Patient Sequence Number: 1
• Patient Outcome(s): Hospitalization; Required Intervention
• Patient Age: 66 YR