MAUDE Adverse Event Report: SMITH & NEPHEW, INC. LEGION NARROW PS OXIN SZ 4N RT; PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL

Catalog Number	71421274
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Codes	Pain (1994); Loss of Range of Motion (2032)
Date of Event	02/25/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that, after a tkr surgery that had been performed on unknown date, the patient experienced pain and knee stiffness.This adverse event was treated by a revision surgery on (b)(6) 2026, in which all primary tkr implants were removed.Current health status of patient is unknown.
Additional Manufacturer Narrative
Internal complaint reference: (b)(4).This complaint was opened by smith+nephew to document a patient complication reported that includes reference to the use of a smith+nephew product without evidence about a specific product problem.The reported complication relates to known inherent procedural risks that are appropriately documented in our risk files.Smith+nephew will continue to monitor trends in accordance with our post-market surveillance process and take necessary action as required if anticipated severity and/or occurrence rates are exceeded.Smith+nephew has no reason to suspect that the product failed to meet any specifications at the time of manufacture.Based on our review of all currently available information, we are unable to confirm a relationship between the reported event and the device or identify a definitive root cause.However, as the use of our product cannot be excluded as a potential cause or contributory factor to the reported issue, we are submitting this report in accordance with applicable regulations.If additional investigative findings or information becomes available that alters the conclusions of this report, a follow-up report will be submitted as required.

• Brand Name: LEGION NARROW PS OXIN SZ 4N RT
• Common Device Name: PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL
• Manufacturer (Section D): SMITH & NEPHEW, INC.; 1450 brooks rd.; memphis TN 38116
• Manufacturer (Section G): SMITH & NEPHEW, INC.; 1450 brooks rd.; memphis TN 38116
• Manufacturer Contact: holly topping ; 1450 brooks rd.; memphis, TN 38116 ; 5123913905
• MDR Report Key: 24600343
• Report Number: 1020279-2026-00348
• Device Sequence Number: 8569175
• Product Code: JWH
• UDI-Device Identifier: 00885556234150
• UDI-Public: 885556234150
• Combination Product (Y/N): N
• Initial Reporter Country: AS
• PMA/510(K) Number: K043440
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Explanted Year: 2026
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Other,Foreign,Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 03/27/2026

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 Catalogue Number: 71421274
• Device Lot Number: 24HM06390
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 02/25/2026
• Supplement Date Received by Manufacturer: 03/22/2026
• Initial Report FDA Received Date: 03/14/2026
• Supplement Report FDA Received Date: 03/30/2026
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 08/12/2024
• 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
• Concomitant Medical Products and Therapy/Usage Dates: 71420182/T2424138/GNS II CMT TIB SIZE 3 {} RIGHT; 71420568/24KM11251/GNS II BICONVEX PAT 26MM; 71453211/24AL00041/LGN PS HIGH FLEX XLPE SZ 3-4 9M
• Outcome Attributed to Adverse Event: Required Intervention; Hospitalization
• Patient Sex: Unknown