MAUDE Adverse Event Report: ZIMMER SWITZERLAND MANUFACTURING GMBH BLUNT TIP SCREW, 4X48MM; ROD, FIXATION, INTRAMEDULLARY AND ACCESSORIES

Model Number	N/A
Medical Device Problem Code	Migration (4003)
Health Effect - Clinical Code	Failure of Implant (1924)
Date of Event	01/25/2023
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
(b)(4).Report source: foreign: japan.Concomitant medical products: proximal humerus, right, 11x160mm item#: 47249616011, lot#: 3081920; blunt tip screw, 4x46mm item#: 47248604640, lot#: 3076834; blunt tip screw, 4x46mm item#: 47248604640 lot#: 3081981.Multiple mdr reports were filed for this event, please see associated reports: 0009613350-2023-00061.0009613350-2023-00063 and 0009613350-2023-00064.The device will not be returned for analysis; however, an investigation of the reported event is in progress.Once the investigation is completed, a supplemental medwatch 3500a will be submitted.
Event or Problem Description
It was reported that approximately three (3) months after implantation, during a routine post-operative check-up, it was found out that the proximal screw had backed out from the proper position.Attempts have been made and no further information has been provided.
Additional Manufacturer Narrative
(b)(4).This follow-up report is being submitted to relay additional information.No product was returned or pictures provided; visual and dimensional evaluations could not be performed.A review of the device manufacturing records confirmed no abnormalities or deviations.Devices used for treatment.The reported products were reviewed for compatibility with no issues noted.The surgical technique explains that the locking of the corelock is done using the corelock driver with torque limiting handle."turn slowly clockwise to tighten and engage the corelock mechanism until a click is felt from the torque limiting handle." radiographs were provided and reviewed from a radiologist.Two undated x-rays of the right shoulder were provided.Initial image with surgical staples reveals anatomic alignment of the right proximal humeral fracture fixation with intramedullary nail, plate and multiple screws.The second image, following staple removal, demonstrates maintained alignment, although one of the proximal screws has slightly retracted since the prior exam.Implant fit and alignment is maintained on both images.Bone quality is osteopenic.No signs of loosening, wear, radiolucency, or any other contributing factor such as malalignment that would cause issues with any of the components on the x-ray.Based on the investigation, it could be assumed that possible contributing factors contributing to the migration of the screws could be multifactorial related to either patient condition, behavior or implantation procedure.If and to what extent any of these aspects may have influenced the migration of the screw remains unknown.An additional deeper investigation was performed which identified the design limitation of the corelock mechanism of the affixus nail as a potential contributing factor.As part of the deeper investigation, a scientific literature search was conducted and a systematic review of the outcome of intramedullary nailing for acute proximal humerus fracture showed that screw migration and perforation into the joint is the second most common complication following secondary loss of reduction.In addition, scientific literature of competitor and predicate devices were assessed.This review has shown that the affixus® natural nail® proximal humeral system performs better and/or in equal range in comparison with legally marketed similar devices.In conclusion, as the cause may be multifactorial an exact root cause could not be identified for the migration of the screw.If any further information is found which would change or alter any conclusions or information, a supplemental report will be filed accordingly.Zimmer biomet will continue to monitor for trends.
Event or Problem Description
No further event information available at the time of this report.

• Brand Name: BLUNT TIP SCREW, 4X48MM
• Common Device Name: ROD, FIXATION, INTRAMEDULLARY AND ACCESSORIES
• Manufacturer (Section D): ZIMMER SWITZERLAND MANUFACTURING GMBH; sulzer allee 8; sulzer industrie park; winterthur 8404 ; SZ 8404
• Manufacturer (Section G): ZIMMER SWITZERLAND MANUFACTURING GMBH; sulzer allee 8; sulzer industrie park; winterthur 8404 ; SZ 8404
• Manufacturer Contact: christina arnt ; 56 e. bell dr.; warsaw, IN 46582 ; 5745273773
• MDR Report Key: 16406645
• Report Number: 0009613350-2023-00065
• Device Sequence Number: 17692513
• Product Code: HSB
• UDI-Device Identifier: 00889024505483
• UDI-Public: (01)00889024505483(17)260809(10)3076790
• Combination Product (Y/N): N
• Initial Reporter Country: JA
• PMA/510(K) Number: K200814
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2022
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Manufacturer
• Report Source: Foreign,Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 03/22/2023

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?: Yes
• Operator of Device: Lay User/Patient
• Device Expiration Date: 08/09/2026
• Device Model Number: N/A
• Device Catalogue Number: 47248604840
• Device Lot Number: 3076790
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 01/27/2023
• Supplement Date Received by Manufacturer: 03/21/2023
• Initial Report FDA Received Date: 02/21/2023
• Supplement Report FDA Received Date: 03/22/2023
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 08/05/2021
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Other
• Patient Sex: Male