MAUDE Adverse Event Report: AESCULAP AG COLUMBUS® UC; PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL

Model Number	NN423
Medical Device Problem Code	Patient-Device Incompatibility (2682)
Health Effect - Clinical Code	Implant Pain (4561)
Type of Reportable Event	Serious Injury
Event or Problem Description
A law firm reports that a patient alleges post-operative loosening of aesculap knee implant.Reportedly there was alleged pain and swelling 1 year, 5 months post operative after the revision of the left knee.The adverse event is filed under ais reference: (b)(4).

• Brand Name: COLUMBUS® UC
• Common Device Name: PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL
• Manufacturer (Section D): AESCULAP AG; po box 40; tuttlingen, 78501 ; GM 78501
• MDR Report Key: 25055836
• Report Number: 3005673311-2026-00088
• Device Sequence Number: 10101523
• Product Code: JWH
• UDI-Device Identifier: 04038653445462
• UDI-Public: (01)04038653445462
• Combination Product (Y/N): N
• Initial Reporter State: GA
• 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: Physician
• Type of Report: Initial
• Report Date (Section B): 04/30/2026
• Report Date (Section F): 04/30/2026

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 Model Number: NN423
• Device Catalogue Number: NN423
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Was the Report Sent to FDA?: Yes
• Distributor Facility Aware Date: 04/09/2026
• Event Location: Hospital
• Date Report to Manufacturer: 04/09/2026
• Initial Date Received by Manufacturer: Not provided
• Initial Report FDA Received Date: 05/01/2026
• 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 Sex: Unknown
• Date Report Sent to FDA: 04/30/2026