MAUDE Adverse Event Report: Mainstay Medical Limited ReActiv8; ReActiv8 Implantable Pulse Generator

Model Number	5100
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Code	Implant Pain (4561)
Date of Event	06/01/2026
Type of Reportable Event	Serious Injury
Event or Problem Description
It was reported that the patient experienced pocket pain at the implantable pulse generator (ipg) pocket site due to superficial ipg placement.There was no report of patient harm or injury.The patient underwent revision surgery, and the physician repositioned the ipg to a more comfortable position and implanted it more deeply.The procedure was successful without complication.The device remains implanted and functional.There were no allegations regarding the device's functionality.Following the ipg repositioning, the reactiv8 system was activated to allow the patient to initiate bilateral stimulation (when initiated by the patient).
Additional Manufacturer Narrative
Mml # (b)(4).

• Brand Name: ReActiv8
• Common Device Name: ReActiv8 Implantable Pulse Generator
• Manufacturer (Section D): Mainstay Medical Limited; clonmel house, forster way; swords, co. dublin K67F2 K3; EI K67F2K3
• Manufacturer Contact: liza dominguez ; 2159 india street; suite 200; san diego, CA 92101 ; +1(619)206-3331
• MDR Report Key: 25673226
• Report Number: 3021520203-2026-00079
• Device Sequence Number: 10447575
• Product Code: QLK
• UDI-Device Identifier: 05391527770015
• UDI-Public: 0105391527770015112409271726101721692010H5309
• Combination Product (Y/N): N
• Initial Reporter Country: AS
• PMA/510(K) Number: P190021
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2025
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Foreign,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 09/24/2026

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: Lay User/Patient
• Device Model Number: 5100
• Device Catalogue Number: 5100
• 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: 06/01/2026
• Supplement Date Received by Manufacturer: 09/11/2026
• Initial Report FDA Received Date: 06/30/2026
• Supplement Report FDA Received Date: 09/24/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 09/27/2024
• 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
• Outcome Attributed to Adverse Event: Other
• Patient Age: 80 YR
• Patient Sex: Male