MAUDE Adverse Event Report: AESCULAP AG AS NUT F/FEMUR EXTENS.STEM ALL SZ.NEUTR.; PROSTHESIS, KNEE, FEMOROTIBIAL, CONSTRAINED, CEMENTED, METAL/POLYMER

Model Number	NR400Z
Medical Device Problem Code	Patient-Device Incompatibility (2682)
Health Effect - Clinical Code	Failure of Implant (1924)
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
Investigation on-going.Should relevant additional information / investigation results become available, a supplemental medwatch report will be submitted.
Event or Problem Description
It was reported to aesculap inc.That an as nut f/femur extens.Stem all sz.Neutr.(part# nr400z) was implanted on (b)(6) 2023.According to the complainant a surgery to replace the polyethylene components had been planned for (b)(6) 2025; sizes larger than 20 millimeter (mm) needed.The procedure would be revision right knee total arthroplasty (tka).Additional information was not provided but has been requested.The adverse event is filed under aic reference (b)(4).Associated medwatch reports: 3005673311-2025-00019, 3005673311-2025-00020, 3005673311-2025-00021, 3005673311-2025-00022, 3005673311-2025-00023, 3005673311-2025-00024, 3005673311-2025-00025, 3005673311-2025-00026, 3005673311-2025-00027, 3005673311-2025-00028, 3005673311-2025-00030.
Additional Manufacturer Narrative
Investigation results: the device was not returned to the manufacturer for physical evaluation.Additionally, no on-site evaluation of the unit was performed and no parts were returned for failure analysis.Therefore, the investigation was not able to confirm a device issue that could be associated with the reported event.Batch history review: the device history records (dhr) were not able to be reviewed as no lot number was made available.However, all device history records (dhr) are reviewed and released according to documented procedures and a device is not released if it does not meet requirements or is nonconforming.Conclusion and measures / preventative measures: a definitive conclusion regarding the complaint incident cannot be reached without a physical examination of the complaint device.

• Brand Name: AS NUT F/FEMUR EXTENS.STEM ALL SZ.NEUTR.
• Common Device Name: PROSTHESIS, KNEE, FEMOROTIBIAL, CONSTRAINED, CEMENTED, METAL/POLYMER
• Manufacturer (Section D): AESCULAP AG; po box 40; tuttlingen, 78501 ; GM 78501
• MDR Report Key: 21755164
• Report Number: 3005673311-2025-00029
• Device Sequence Number: 9821667
• Product Code: KRO
• UDI-Device Identifier: 04046963367732
• UDI-Public: (01)04046963367732
• Combination Product (Y/N): N
• Initial Reporter State: OK
• Initial Reporter Country: US
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2023
• Serviced by Third Party (Y/N): Unknown
• Reporter Type: Importer
• Initial Reporter Occupation: Nurse
• Type of Report: Initial,Followup
• Report Date (Section B): 04/30/2025
• Report Date (Section F): 04/02/2025

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: Health Professional
• Device Model Number: NR400Z
• Device Catalogue Number: NR400Z
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 03/13/2025
• Event Location: Hospital
• Date Report to Manufacturer: 03/13/2025
• Initial Date Received by Manufacturer: Not provided
• Supplement Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 04/02/2025
• Supplement Report FDA Received Date: 04/30/2025
• 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: Required Intervention
• Patient Age: 60 YR
• Patient Sex: Female
• Date Report Sent to FDA: 04/02/2025