MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH MRHK BUMPER INSERT - NEUTRAL; PROSTHESIS, KNEE, FEMOROTIBIAL, CONSTRAINED, CEMENTED, METAL/POLYMER

Model Number 6481-2-130

Device Problem Degraded (1153)

Patient Problems Ambulation Difficulties (2544); Insufficient Information (4580)

Event Date 07/18/2022

Event Type  Injury  

Manufacturer Narrative

It was noted that the device is not available for evaluation.Should additional information become available, it will be provided in a supplemental report upon completion of the investigation.

Event Description

It was reported that the surgeon revised the axle bushings and bumper as a result of excessive wear.

Event Description

It was reported that the surgeon revised the axle bushings and bumper as a result of excessive wear.

Manufacturer Narrative

Reported event: an event regarding wear involving a mrh bumper was reported.The event was confirmed via evaluation of the returned device.Method & results: -device evaluation and results: the device was returned for evaluation.Blood and yellow discoloration is visible on the device.The damage present on the polyethylene devices appears consistent with delamination and material loss.The damage to the bushings and bumper is consistent with burnishing, scratching, and third body indentations; which are common damage modes of uhmwpe.The yellow discoloration observed is consistent with the absorption of synovial fluid by the device.-clinician review:a review of the provided medical records by a clinical consultant stated the following comment: i have had the opportunity to review documentation related to pi including the product inquiry summary, and an ap and lateral view x-rays of a dmrs tka.The event description from the product inquiries summary states: it was reported that the surgeon revised the axle bushings and bumper as a result of excessive wear.The ap and lateral x-rays show a cemented gmrs tka in good position without evidence of mechanical complication.The limited documentation does not provide confirming evidence of a mechanical complication i.E., wear of the bushings and axle.As such the root cause for this cannot be determined.Should additional information become available i would be happy to further this assessment.-device history review: review of the device history records indicate devices were manufactured and accepted into final stock with no relevant reported discrepancies.-complaint history review: there have been no other similar events for the lot referenced.Conclusion: an event regarding wear was reported.The device was returned for evaluation.Blood and yellow discoloration is visible on the device.The damage present on the polyethylene devices appears consistent with delamination and material loss.The damage to the bushings and bumper is consistent with burnishing, scratching, and third body indentations; which are common damage modes of uhmwpe.The yellow discoloration observed is consistent with the absorption of synovial fluid by the device.A review of the provided medical records by a clinical consultant stated the following comment: i have had the opportunity to review documentation related to pi including the product inquiry summary, and an ap and lateral view x-rays of a dmrs tka.The event description from the product inquiries summary states: it was reported that the surgeon revised the axle bushings and bumper as a result of excessive wear.The ap and lateral x-rays show a cemented gmrs tka in good position without evidence of mechanical complication.The limited documentation does not provide confirming evidence of a mechanical complication i.E., wear of the bushings and axle.As such the root cause for this cannot be determined.Should additional information become available i would be happy to further this assessment.No further investigation for this event is possible at this time.If additional information become available to indicate further evaluation is warranted, this record will be reopened.

• Brand Name: MRHK BUMPER INSERT - NEUTRAL
• Type of Device: PROSTHESIS, KNEE, FEMOROTIBIAL, CONSTRAINED, CEMENTED, METAL/POLYMER
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• Manufacturer (Section G): STRYKER ORTHOPAEDICS-LIMERICK; raheen business park; limerick NA ; EI NA
• Manufacturer Contact: marisol santiago ; 325 corporate drive; mahwah, NJ 07430 ; 2018315000
• MDR Report Key: 15188432
• MDR Text Key: 297488855
• Report Number: 0002249697-2022-01154
• Device Sequence Number: 1
• Product Code: KRO
• UDI-Device Identifier: 07613327045260
• UDI-Public: 07613327045260
• Combination Product (y/n): N
• Reporter Country Code: CA
• PMA/PMN Number: K002552
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: Other,Health Professional
• Reporter Occupation: Other Health Care Professional
• Type of Report: Initial,Followup
• Report Date: 11/07/2022

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 08/08/2022
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Health Professional
• Device Expiration Date: 08/31/2015
• Device Model Number: 6481-2-130
• Device Catalogue Number: 64812130
• Device Lot Number: LBZ337
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Is the Reporter a Health Professional?: Yes
• Date Manufacturer Received: 10/13/2022
• Was Device Evaluated by Manufacturer?: Yes
• Date Device Manufactured: 08/18/2010
• 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; Hospitalization