MAUDE Adverse Event Report: SMITH & NEPHEW, INC. LEGION POROUS CRUCIATE RETAINING FEMORAL SIZE 5 RIGHT; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO

Catalog Number	71423255
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Code	Thrombosis/Thrombus (4440)
Date of Event	11/26/2019
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that, after a tka surgery had been performed on (b)(6) 2019, the patient experienced a deep vein thrombosis in the right lower extremity on (b)(6) 2019.This adverse event was treated using medication therapy.The outcome of the event is that the adverse event was resolved and the patient recovered.This adverse event was identified during a clinical study.
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.
Additional Manufacturer Narrative
It was reported that, after a tka surgery had been performed on (b)(6) 2019, the patient experienced a deep vein thrombosis in the right lower extremity on (b)(6) 2019.This adverse event was treated using medication therapy.The outcome of the event is that the adverse event was resolved and the patient recovered.This adverse event was identified during a clinical study.

• Brand Name: LEGION POROUS CRUCIATE RETAINING FEMORAL SIZE 5 RIGHT
• Common Device Name: PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, CO
• 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: 23265740
• Report Number: 1020279-2025-01682
• Device Sequence Number: 5218166
• Product Code: MBH
• UDI-Device Identifier: 00885556031964
• UDI-Public: 885556031964
• Combination Product (Y/N): N
• Initial Reporter State: MN
• Initial Reporter Country: US
• PMA/510(K) Number: K073325
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2019
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Study,Health Professional
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 11/12/2025

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?: No
• Operator of Device: Health Professional
• Device Catalogue Number: 71423255
• Device Lot Number: 19EM20440
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 09/11/2025
• Supplement Date Received by Manufacturer: 11/06/2025
• Initial Report FDA Received Date: 10/10/2025
• Supplement Report FDA Received Date: 11/12/2025
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 05/13/2019
• 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: Required Intervention
• Patient Age: 66 YR
• Patient Sex: Female
• Patient Weight: 144 KG