MAUDE Adverse Event Report: HOUSTON LEAD MODEL 303

Model Number	303-20
Medical Device Problem Codes	Low impedance (2285); Electrical Shorting (2926)
Health Effect - Clinical Code	No Clinical Signs, Symptoms or Conditions (4582)
Date of Event	07/01/2025
Type of Reportable Event	Malfunction
Event or Problem Description
It was reported that the patient's generator showed a lower impedance during pre op interrogation.The impedance was within normal limits at 695 ohms.Of note, the patient was seen with actual low impedance back in july as well but this was never reported to the manufacturer.The generator was replaced and tested but impedance was alerting at <600 ohms (true low impedance).The device remains turned off.A lead revision is being considered.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
Data from the generator that was first seen to show low impedance was reviewed.No anomalies were identified during the review.
Event or Problem Description
Later follow-up revealed that no error codes were seen in tandem with the low impedance reading, further confirming that the cause of the low impedance was a lead related issue.

• Brand Name: LEAD MODEL 303
• Common Device Name: LEAD
• Manufacturer (Section D): HOUSTON; 100 cyberonics boulevard; houston TX 77058
• Manufacturer (Section G): HOUSTON; 100 cyberonics boulevard; suite 600; houston TX 77058
• Manufacturer Contact: cindy scott ; 100 cyberonics blvd; suite 600; houston, TX 77058 ; 2816672681
• MDR Report Key: 23656390
• Report Number: 1644487-2025-10890
• Device Sequence Number: 10055470
• Product Code: LYJ
• UDI-Device Identifier: 05425025750115
• UDI-Public: 05425025750115
• Combination Product (Y/N): N
• Initial Reporter Country: UK
• PMA/510(K) Number: P970003
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2013
• Reporter Type: Manufacturer
• Report Source: Foreign,Company Representative
• Initial Reporter Occupation: Non-Healthcare Professional
• Type of Report: Initial,Followup,Followup
• Report Date (Section B): 01/07/2026

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 Expiration Date: 09/01/2016
• Device Model Number: 303-20
• Device Lot Number: 3429
• Was Device Available for Evaluation?: No
• Type of Report(Section G): Thirty-Day
• Initial Date Received by Manufacturer: 11/03/2025
• Supplement Date Received by Manufacturer: 12/01/2025; 01/07/2026
• Initial Report FDA Received Date: 11/26/2025
• Supplement Report FDA Received Date: 12/24/2025; 01/07/2026
• Was Device Evaluated by Manufacturer? (Y/N): No
• Date Device Manufactured: 09/18/2012
• Is the Device Labeled for Single Use? (Y/N): Yes
• Usage of Device: Initial
• Patient Sequence Number: 1
• Patient Age: 51 YR
• Patient Sex: Male