MAUDE Adverse Event Report: MAINSTAY MEDICAL LIMITED REACTIV8; REACTIV8 IMPLANTABLE STIMULATION LEAD

Model Number	8145
Medical Device Problem Code	Failure to Conduct (1114)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	03/20/2026
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that the patient underwent revision surgery to replace the right lead due to one of the electrodes being out of range (oor/high-impedance failure).No impact on the patient or therapy because the electrode was not set for therapy.A new lead was implanted without complications.No part was returned for evaluation.Therefore, no actual device evaluation could be performed.The post-implant imaging was reviewed, and it was confirmed that the oor was caused by an improper implant technique.Following the lead revision, 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 STIMULATION LEAD
• 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 ; 6192063331
• MDR Report Key: 24919264
• Report Number: 3021520203-2026-00048
• Device Sequence Number: 10565060
• Product Code: QLK
• UDI-Device Identifier: 05391527772064
• UDI-Public: 01053915277720641121022617240301
• Combination Product (Y/N): N
• Initial Reporter State: OH
• Initial Reporter Country: US
• PMA/510(K) Number: P190021
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2022
• Device Explanted Year: 2026
• Serviced by Third Party (Y/N): N
• Reporter Type: Manufacturer
• Report Source: Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 04/17/2026

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: No
• Is this a Product Problem Report?: Yes
• Operator of Device: Lay User/Patient
• Device Model Number: 8145
• Device Catalogue Number: 8145
• 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: 03/20/2026
• Initial Report FDA Received Date: 04/18/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 02/26/2021
• 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
• Patient Age: 50 YR
• Patient Sex: Female
• Patient Weight: 71 KG
• Patient Race: White