MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH MRH KNEE FEM S LFT; PROSTHESIS, KNEE, FEMOROTIBIAL, CONSTRAINED, CEMENTED, METAL/POLYMER

Model Number	6481-1-110
Medical Device Problem Code	Detachment of Device or Device Component (2907)
Health Effect - Clinical Code	Insufficient Information (4580)
Date of Event	02/12/2021
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Reported event: an event regarding disassociation involving mrh knee fem s lft was reported.The event was not confirmed. method & results: device evaluation and results: material analysis, visual, functional and dimensional inspections could not be performed as the device was not returned.Clinician review: no medical records were received for review with a clinical consultant. device history review: a review of the product history records indicate all devices were manufactured and accepted into final stock with no reported relevant discrepancies.Complaint history review: there have been no other events for the lot referenced.Conclusion: the exact cause of the event could not be determined because insufficient information was provided.Additional information including operative reports, progress notes, x-rays and return of the device are needed to fully investigate the event.If further information becomes available or the product is returned, this investigation will be re-opened.
Event or Problem Description
It was reported that the patient's left knee was revised.As reported by rep: "stem loosening at the boss junction.(revised components) small mrh femur with 10mm augments medial lateral, 10x80 stem and modular components." spoke to rep.The stem was beginning to come unthreaded from the femoral components.There are no allegations against the revised augments or modular components.An mrh femoral component with stem, augments and blocks, tibial sleeve, insert, and tibial rotating component were implanted, and the patient's native patella was resurfaced.Rep provided usage sheets for primary and revision, and confirmed that no further information will be released by the hospital or surgeon.

• Brand Name: MRH KNEE FEM S LFT
• Common Device Name: PROSTHESIS, KNEE, FEMOROTIBIAL, CONSTRAINED, CEMENTED, METAL/POLYMER
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 11447726
• Report Number: 0002249697-2021-00408
• Device Sequence Number: 3105731
• Product Code: KRO
• UDI-Device Identifier: 07613327045130
• UDI-Public: 07613327045130
• Combination Product (Y/N): N
• Initial Reporter State: FL
• Initial Reporter Country: US
• PMA/510(K) Number: K002552
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2017
• Device Explanted Year: 2021
• Reporter Type: Manufacturer
• Report Source: health professional,other
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 03/09/2021

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: 02/28/2022
• Device Model Number: 6481-1-110
• Device Catalogue Number: 64811110
• Device Lot Number: BYE9H
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 02/12/2021
• Initial Report FDA Received Date: 03/09/2021
• 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: Hospitalization; Required Intervention
• Patient Age: 48 YR