MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRIATHLON CEMENTED STEM-15MM X 50MM; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, C

Catalog Number 5560-S-115

Device Problems Corroded (1131); Loss of Osseointegration (2408)

Patient Problems Pain (1994); Injury (2348); Ambulation Difficulties (2544); Inadequate Osseointegration (2646)

Event Date 05/14/2012

Event Type  Injury  

Manufacturer Narrative

The information in this report was provided by stryker orthopaedics legal affairs department.No additional information is available at this time due to the ongoing litigation.Should additional information become available, the evaluation summary will be submitted in a supplemental report.Device not returned.

Event Description

Letter received from patient's lawyers advising the stryker ts triathlon knee replacement is "defective and materially contributed to.On going left lower limb problems including the development of a pseudo-tumour".Patient is reports left knee problems following surgery on the (b)(6) 2012.Please see communication log for details regarding additional information.

Event Description

Letter received from patient's lawyers advising the stryker ts triathlon knee replacement is "defective and materially contributed to.On going left lower limb problems including the development of a pseudo-tumour." patient is reports left knee problems following surgery on (b)(6) 2012.Please see communication log for details regarding additional information.As per op report: triathlon ts cemented revision knee from an 63 year old male revised after 4 years due to osteolysis and alval (pseudotumour) is presented for analysis.High activity level and medial bone loss around the tibial component are considered contributory factor to failure of the device.Femoral component: a combination of bone and fibrous tissue onto cement mantle indicating a well fixed components - numerous longitudinal scratches on bearing surface threaded boss covered with organic material and showing wear on the surface in contact with stem extender (fig.1).Femoral stem extender: corrosion and wear in the base of threaded trunnion from uneven engagement with femoral component boss covered with organic material (fig.2).Femoral stem: wear in the base of threaded trunnion from uneven engagement with femoral extender tibia baseplate: polished cement surface, indicative of micromotion, postero-medially bone tissue still attached to the cement mantle, anteriorly severe fretting corrosion of the surface of the boss as well as corrosion deposits in the threaded boss in contact with stem trunnion.Tibial stem: component was loose and removed from the baseplate manually gross fretting and corrosion in the trunnion: stem surface (inset, fig.4), and in the trunnion threads (fig.5) polyethylene (pe) insert: slight wear on the bearing surface, mostly scratching and burnishing burnishing around the ps post, posteriorly and media-lateral regions from contact with the femoral component.

Manufacturer Narrative

Additional information: event details.An event regarding altr (adverse local tissue reaction) and osteolysis involving a triathlon ts stem component was reported.The event was not confirmed.Method & results: product evaluation and results: no product was returned for evaluation however photographs were provided.The photographs are of poor quality and show the stem component threaded into the extension piece on the femoral side.No conclusions can be drawn from the images provided.Clinician review: a review of the provided medical records by a clinical consultant stated the following comment: need examination of explanted components by stryker, need x-rays, clinical past medical history, imaging studies and primary operative report.Product history review: indicated all devices were manufactured and accepted into final stock with no reported discrepancies.Complaint history review: there have been no other similar events for the lot referenced.Conclusions: the event itself could not be confirmed and exact cause of the event could not be determined because insufficient information was provided.Further information such as examination of explanted components, x-rays, clinical past medical history, imaging studies and primary operative report are required to complete the investigation for determining a root cause.No further investigation is required at this time.If additional information becomes available to indicate further evaluation is warranted, this record will be reopened.

• Brand Name: TRIATHLON CEMENTED STEM-15MM X 50MM
• Type of Device: PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, C
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 8229287
• MDR Text Key: 132482786
• Report Number: 0002249697-2019-00115
• Device Sequence Number: 1
• Product Code: MBH
• UDI-Device Identifier: 07613327026702
• UDI-Public: 07613327026702
• Combination Product (y/n): N
• PMA/PMN Number: K141056
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: company representative,other
• Type of Report: Initial,Followup
• Report Date: 06/11/2019

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 01/08/2019
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Health Professional
• Device Expiration Date: 06/30/2016
• Device Catalogue Number: 5560-S-115
• Device Lot Number: M6K17J
• Was Device Available for Evaluation?: No
• Date Manufacturer Received: 05/14/2019
• Is This a Reprocessed and Reused Single-Use Device?: No
• Patient Sequence Number: 1
• Patient Outcome(s): Hospitalization; Required Intervention
• Patient Age: 58 YR