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	07/01/2026
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
(b)(4).
Event or Problem Description
It was reported that the patient experienced discomfort at the implantable pulse generator (ipg) pocket site.There was no report of patient harm or injury.As a result, the patient underwent surgery.The ipg was relocated from the right flank to the right upper buttock without complications.The device remains implanted and functional.

• 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: 50074170
• Report Number: 3021520203-2026-00095
• Device Sequence Number: 13313630
• Product Code: QLK
• UDI-Device Identifier: 05391527770015
• UDI-Public: 0105391527770015112407191726080721627410H5253
• Combination Product (Y/N): N
• Initial Reporter State: MD
• Initial Reporter Country: US
• 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: Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup
• Report Date (Section B): 09/29/2026

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
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 07/01/2026
• Supplement Date Received by Manufacturer: 09/29/2026
• Initial Report FDA Received Date: 07/29/2026
• Supplement Report FDA Received Date: 09/30/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 07/19/2024
• 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 Sex: Male
• Patient Weight: 209 LB
• Patient Race: White