Reported Reactions

Devices › Intrasaccular flow disruption device

Device brand name · Intrasaccular flow disruption device

Web Sl: medical device reports filed with FDA

614 reports name it, 2021–2026. Manufacturer given most often on reports: Microvention. Product code OPR.

614
device reports naming the brand
0% of all MAUDE reports · about 112 a year
130
reports, 12 months to August 2026
164 in the 12 months before
55.2%
classified as malfunction
52.4% across the product code
3.1%
classified as death, as reported
19 reports · not verified by FDA

FDA's MAUDE database holds 614 reports that name the brand "Web Sl" (intrasaccular flow disruption device), received between January 2021 and August 2026; the manufacturer given most often on reports is Microvention. Spellings of one product vary from report to report.

130 reports arrived in the 12 months to August 2026, down 21% from 164 in 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 (55.2%), injury (41.7%) and death (3.1%); across all intrasaccular flow disruption device reports (product code OPR) death is recorded in 3.9% and malfunction in 52.4%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are separation failure (34.2%), difficult or delayed separation (28.5%) and device dislodged or dislocated (12.2%). The patient problems coded most often are thrombosis/thrombus, aneurysm and ruptured aneurysm. 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

01530Sep 2021: 1Oct 2021: 1Nov 2021: 0Dec 2021: 22022Jan 2022: 4Feb 2022: 5Mar 2022: 3Apr 2022: 10May 2022: 3Jun 2022: 2Jul 2022: 4Aug 2022: 7Sep 2022: 3Oct 2022: 1Nov 2022: 6Dec 2022: 12023Jan 2023: 4Feb 2023: 5Mar 2023: 5Apr 2023: 3May 2023: 8Jun 2023: 10Jul 2023: 8Aug 2023: 8Sep 2023: 9Oct 2023: 8Nov 2023: 16Dec 2023: 142024Jan 2024: 12Feb 2024: 30Mar 2024: 18Apr 2024: 18May 2024: 25Jun 2024: 16Jul 2024: 11Aug 2024: 10Sep 2024: 13Oct 2024: 13Nov 2024: 10Dec 2024: 172025Jan 2025: 13Feb 2025: 13Mar 2025: 26Apr 2025: 13May 2025: 12Jun 2025: 16Jul 2025: 9Aug 2025: 9Sep 2025: 6Oct 2025: 11Nov 2025: 8Dec 2025: 132026Jan 2026: 12Feb 2026: 16Mar 2026: 12Apr 2026: 9May 2026: 8Jun 2026: 9Jul 2026: 13Aug 2026: 13

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

0971932021: 3320212022: 4920222023: 9820232024: 19320242025: 14920252026: 922026

Event type and report source

Event type, as classified on the report

Death3.1%19
Injury41.7%256
Malfunction55.2%339
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%614
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 907 reports carrying product code OPR. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Separation failure21034.2%34%
Difficult or delayed separation17528.5%25.6%
Device dislodged or dislocated7512.2%11.1%
Migrationthe device moved from where it was placed172.8%3.3%
Premature separation152.4%2.5%
Separation problem142.3%1.9%
Activation failure122%1.5%
Detachment of device or device componentpart of the device came off101.6%1.8%
Material deformation91.5%1%
Unintended movement71.1%2.2%
Difficult or delayed positioning61%1.9%
Inadequacy of device shape and/or size61%0.8%
Physical resistance/sticking40.7%0.4%
Retraction problem40.7%0.9%
Dent in material30.5%0.3%
Activation problem20.3%0.2%
Breakthe device broke20.3%0.2%
Collapse20.3%0.2%
Contamination20.3%0.2%
Device markings/labelling problema problem with the device markings or label20.3%0.3%

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
Thrombosis/thrombus437%
Aneurysm355.7%
Ruptured aneurysm355.7%
Obstruction/occlusion193.1%
Ischemia stroke182.9%
Hemorrhage/blood loss/bleeding122%
Intracranial hemorrhage101.6%
Stroke/cva81.3%
Paresis61%
Speech disordera speech problem61%
Extravasation50.8%
Paralysis50.8%
Rupturethe device burst50.8%
Aneurysm expansion40.7%
Cerebral edema40.7%

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

In context

MeasureWeb SlProduct code OPRAll MAUDE reports
Reports61490726,136,888
Share of that pool—67.7%0%
Classified as death, per 1,000 reports31399
Classified as injury41.7%43.8%36.2%
Classified as malfunction55.2%52.4%62.3%
Filed by the manufacturer100%99.8%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 OPR

BrandReportsLatest 12 monthsClassified as death
Fred 27227135.3%

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 Web Sl reports

How many FDA reports name Web Sl?

614 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 130 in the latest 12 months.

What kinds of events are reported?

malfunction (55.2%), injury (41.7%) and death (3.1%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

separation failure (34.2%), difficult or delayed separation (28.5%), device dislodged or dislocated (12.2%), migration (2.8%) and premature separation (2.4%). 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 Web Sl 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.