Reported Reactions

Devices › Stimulator, autonomic nerve, implanted for epilepsy

Device brand name · Lead

Lead Model 302: medical device reports filed with FDA

7,259 reports name it, 2006–2026. Manufacturer given most often on reports: Cyberonics. Product code LYJ.

7,259
device reports naming the brand
0% of all MAUDE reports · about 354 a year
136
reports, 12 months to August 2026
136 in the 12 months before
91.9%
classified as malfunction
58.7% across the product code
0%
classified as death, as reported
1 reports · not verified by FDA

FDA's MAUDE database holds 7,259 reports that name the brand "Lead Model 302" (lead), received between January 2006 and August 2026; the manufacturer given most often on reports is Cyberonics. Spellings of one product vary from report to report.

136 reports arrived in the 12 months to August 2026, close to the 136 of the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are malfunction (91.9%), injury (8%) and other (0.1%); across all stimulator, autonomic nerve, implanted for epilepsy reports (product code LYJ) death is recorded in 5.6% and malfunction in 58.7%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are high impedance (54.4%), fracture (28.8%) and break (4.7%). The patient problems coded most often are seizures, therapeutic response, decreased and pain. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Reports by month, five years

01937Sep 2021: 18Oct 2021: 19Nov 2021: 19Dec 2021: 212022Jan 2022: 9Feb 2022: 9Mar 2022: 19Apr 2022: 19May 2022: 15Jun 2022: 19Jul 2022: 9Aug 2022: 16Sep 2022: 13Oct 2022: 12Nov 2022: 23Dec 2022: 192023Jan 2023: 10Feb 2023: 16Mar 2023: 19Apr 2023: 13May 2023: 13Jun 2023: 23Jul 2023: 26Aug 2023: 37Sep 2023: 26Oct 2023: 14Nov 2023: 9Dec 2023: 182024Jan 2024: 12Feb 2024: 20Mar 2024: 7Apr 2024: 11May 2024: 23Jun 2024: 32Jul 2024: 18Aug 2024: 14Sep 2024: 2Oct 2024: 14Nov 2024: 15Dec 2024: 132025Jan 2025: 7Feb 2025: 13Mar 2025: 14Apr 2025: 10May 2025: 13Jun 2025: 8Jul 2025: 13Aug 2025: 14Sep 2025: 14Oct 2025: 9Nov 2025: 11Dec 2025: 112026Jan 2026: 5Feb 2026: 7Mar 2026: 12Apr 2026: 8May 2026: 15Jun 2026: 13Jul 2026: 16Aug 2026: 15

Reports by the month FDA received them. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.

By year received

03046082006: 9420062007: 2272008: 3442009: 51820092010: 5512011: 5312012: 59620122013: 6082014: 5542015: 48520152016: 3872017: 4092018: 37220182019: 3282020: 2052021: 23520212022: 1822023: 2242024: 18120242025: 1372026: 91

Event type and report source

Event type, as classified on the report

Death0%1
Injury8%582
Malfunction91.9%6,668
Other0.1%4
Not given0.1%4

Who filed the report

Manufacturer report100%7,259
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 52,004 reports carrying product code LYJ. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
High impedance3,95254.4%18.1%
Fracturea broken bone2,08928.8%8.4%
Breakthe device broke3414.7%1.9%
Low impedance2543.5%1.4%
Battery problema problem with the battery2343.2%3.4%
Corrodedthe device corroded2213%0.8%
Device remains implanted2163%4.9%
Explanted2022.8%4.6%
Insufficient device problem information1652.3%9%
Device operates differently than expectedthe device behaved unexpectedly1642.3%4.5%
Device contamination with body fluid1582.2%0.8%
Replace1562.1%2.6%
Mechanical problema mechanical problem1281.8%0.7%
Naturally worn1281.8%0.7%
Disconnection1161.6%0.6%
Device inoperablethe device could not be used640.9%1.5%
Fluid/blood leak640.9%0.3%
Device displays incorrect message550.8%2.1%
Electrical shorting480.7%0.4%
Migration or expulsion of device480.7%1.1%

FDA's device problem codes as entered on the report; one report can carry several. Generic codes such as "no apparent adverse event" are left out.

Patient problems coded

Patient problem (FDA code)ReportsShare
Seizures91112.5%
Therapeutic response, decreased6699.2%
Painpain, site not specified3094.3%
Therapy/non-surgical treatment, additional1932.7%
Surgical procedure, repeated1552.1%
Paralysis1532.1%
Falla fall1351.9%
Neck painneck pain1351.9%
Surgical procedure911.3%
Convulsion, clonic741%
Discomfortdiscomfort731%
Appropriate clinical signs, symptoms and conditions term/code not available600.8%
Depressionlow mood580.8%
Dysphasia570.8%
Fibrosis550.8%

Patient problem codes are present mainly in reports filed since 2019 and are often blank.

In context

MeasureLead Model 302Product code LYJAll MAUDE reports
Reports7,25952,00426,136,888
Share of that pool—14%0%
Classified as death, per 1,000 reports0569
Classified as injury8%35.5%36.2%
Classified as malfunction91.9%58.7%62.3%
Filed by the manufacturer100%99.5%94.9%

Shares are of reports, not of devices in use. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Other brands with product code LYJ

BrandReportsLatest 12 monthsClassified as death
Programming Software7,45310%
Pulse Gen Model 1025,9031412.2%
Pulse Gen Model 1034,518348.5%
Pulse Gen Model 1064,0231445.1%
Pulse Gen Model 10003,6015495.7%
Lead Model 3043,3292720.1%
Bipol Lead Model 3001,955120.1%
Pulse Gen Model Unk1,914713.6%
Ncp Pulse Generator1,272030%
Lead Model Unknown1,253461.6%
Pulse Gen Model 1011,210012.6%
Pulse Gen Model 1051,19176.7%
Vns Therapy Pulse1,064010.7%
Pulse Gen Model 102r985010.9%
Pulse Gen Model 10486449%

Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA also states that "common products may have a higher number of adverse events due to the higher total number of people using the product."

Questions about Lead Model 302 reports

How many FDA reports name Lead Model 302?

7,259 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 136 in the latest 12 months.

What kinds of events are reported?

malfunction (91.9%), injury (8%) and other (0.1%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

high impedance (54.4%), fracture (28.8%), break (4.7%), low impedance (3.5%) and battery problem (3.2%). These are FDA's device problem codes as entered on the report.

Who files these reports?

manufacturer reports (100%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.

Do these reports show that Lead Model 302 was at fault?

No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA adds that "a causal relationship cannot be established between product and reactions listed in a report."

How do I report a problem with a medical device?

Through FDA MedWatch (Form FDA 3500 for health professionals and consumers), or to the manufacturer. See the guide on how to report.

Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. A report counts here when any device it lists carries this brand name after punctuation and capitalisation are normalised. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.