MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRIATHLON P/A CR BEADED #4L; KNEE JOINT PATELLOFEMOROTIBIAL METAL/POLYMER POROUS-COATED UNCEMENTED PROSTHESIS

Catalog Number	5517F401
Medical Device Problem Codes	Malposition of Device (2616); Positioning Problem (3009)
Health Effect - Clinical Code	Injury (2348)
Date of Event	10/11/2017
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
An event regarding malposition involving a triathlon femoral component was reported.The event was confirmed.Method and results: device evaluation and results: not performed as product remains implanted medical records received and evaluation: a review of the provided medical records and x-rays by a clinical consultant indicated: excessive posterior tibial baseplate slope of 9°, relative varus position of the baseplate of 5°, excessive distal femoral bone resection with thin tibial bearing, twisting trauma as trigger event for clinical symptoms.Device history review: dhr review for the reported lot determined that the device was manufactured and packed to specification.Complaint history review: complaint history review confirmed that there have been no other similar events for the reported lot.Conclusions: clinician review of the records provided indicated: complex and multiple component malposition as related to baseplate malposition in varus and excessive posterior slope, varus deformity across the knee and excessive distal femoral bone resection with use of a thin cr bearing has contributed to progressive knee instability where a twisting trauma to the knee was the trigger event to bring clinical symptoms to the level of medical attention with revision surgery and liner exchange performed within 2-years of implantation.No further investigation is possible at this time.If additional information becomes available to indicate further evaluation is warranted, this record will be reopened.Implanted.
Event or Problem Description
The surgeon reported via the sales rep, (b)(6) that a female patient underwent a revision of the left knee on (b)(6) 2017 due to a fractured tibial insert size 3 9 mm.It was further reported that the patient had experienced a twisting trauma to the knee approximately 2 months prior to the revision.It was further reported that the operation began as an exploratory endoscopy but was transferred to an open procedure when it was discovered that the insert had fractured.It was further reported that the insert was replaced with a size 3 11 mm insert and that the primary operation took place on (b)(6) 2016.**update: the medical review concluded malposition of both the femoral component and the baseplate.

• Brand Name: TRIATHLON P/A CR BEADED #4L
• Common Device Name: KNEE JOINT PATELLOFEMOROTIBIAL METAL/POLYMER POROUS-COATED UNCEMENTED PROSTHESIS
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 7233630
• Report Number: 0002249697-2018-00288
• Device Sequence Number: 1994138
• Product Code: MBH
• UDI-Device Identifier: 07613327040937
• UDI-Public: 07613327040937
• Combination Product (Y/N): N
• Initial Reporter Country: SE
• PMA/510(K) Number: K141056
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2015
• Reporter Type: Manufacturer
• Report Source: health professional,other
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 02/01/2018

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 Expiration Date: 11/17/2020
• Device Catalogue Number: 5517F401
• Device Lot Number: ANM8M
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 01/05/2018
• Initial Report FDA Received Date: 02/01/2018
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Other; Required Intervention
• Patient Age: 62 YR
• Patient Weight: 80