MAUDE Adverse Event Report: LIVANOVA USA, INC. PULSE GEN MODEL 1000D; GENERATOR

Model Number	1000D
Medical Device Problem Codes	High impedance (1291); Incomplete or Inadequate Connection (4037)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	05/28/2025
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that the patient has been referred for lead revision due to current not being delivered.Internal data was later reviewed and confirmed that the patient is experiencing high impedance.No known relevant surgical intervention has occurred to date.No other relevant information has been received to date.
Additional Manufacturer Narrative
Livanova usa, inc.Submits this report to comply with 21 c.F.R.Part 803, the medical device reporting regulation, based on information that livanova has obtained, but may not have been able to investigate or verify prior to the date the report was required by the fda.This report does not constitute an admission, or a conclusion by fda or anyone else, that the device, livanova, or livanova's employees caused or contributed to the event described in the report.In particular, this report does not constitute an admission by anyone that the product described in this report has any "defects¿ or "malfunctions¿.These words are incorporated into the fda 3500a medwatch form by the fda, and livanova objects to their use.
Event or Problem Description
Additional information received.It was later reported that the patient underwent pin re-insertion surgery and high impedance was resolved.No other relevant information has been received to date.
Event or Problem Description
More information received from the provider.It was noted that x-rays were performed.It was also noted that the patient did not experience any trauma or manipulation around the vns after implant.X-rays were not made available for review.No other relevant information has been received to date.

• Brand Name: PULSE GEN MODEL 1000D
• Common Device Name: GENERATOR
• Manufacturer (Section D): LIVANOVA USA, INC.; 100 cyberonics boulevard; houston TX 77058
• Manufacturer (Section G): LIVANOVA USA, INC.; 100 cyberonics boulevard; houston TX 77058
• Manufacturer Contact: cindy scott ; 100 cyberonics blvd; suite 600; houston, TX 77058 ; 2816672681
• MDR Report Key: 23569142
• Report Number: 1644487-2025-10836
• Device Sequence Number: 10129395
• Product Code: LYJ
• UDI-Device Identifier: 05425025750528
• UDI-Public: 05425025750528
• Combination Product (Y/N): N
• Initial Reporter State: CA
• Initial Reporter Country: US
• PMA/510(K) Number: P970003
• 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: Health Professional,Company Representative
• Initial Reporter Occupation: Physician
• Type of Report: Initial,Followup,Followup
• Report Date (Section B): 01/06/2026

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: Health Professional
• Device Model Number: 1000D
• Device Lot Number: 960
• 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: 10/20/2025
• Supplement Date Received by Manufacturer: 12/05/2025; 12/23/2025
• Initial Report FDA Received Date: 11/17/2025
• Supplement Report FDA Received Date: 12/22/2025; 01/06/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 02/06/2025
• 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: 47 YR
• Patient Sex: Female