Reported Reactions

Devices › Stent, colonic, metallic, expandable

Device brand name · Mqr stent colonic metallic expandable

Evolution Colonic Controlled-Release Stent - Uncovered: medical device reports filed with FDA

153 reports name it, 2013–2026. Manufacturer given most often on reports: Cook Ireland. Product code MQR.

153
device reports naming the brand
0% of all MAUDE reports · about 11 a year
5
reports, 12 months to August 2026
10 in the 12 months before
67.3%
classified as malfunction
44.6% across the product code
0.7%
classified as death, as reported
1 reports · not verified by FDA

153 medical device reports received by FDA name the brand "Evolution Colonic Controlled-Release Stent - Uncovered" (mqr stent colonic metallic expandable); the manufacturer given most often on reports is Cook Ireland; received from January 2013 to June 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

5 reports arrived in the 12 months to August 2026, down 50% from 10 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 (67.3%), injury (32%) and death (0.7%); across all stent, colonic, metallic, expandable reports (product code MQR) death is recorded in 7.9% and malfunction in 44.6%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are activation, positioning or separation problem (17.6%), delivery system failure (13.7%) and break (7.8%). The patient problems coded most often are obstruction/occlusion, occlusion and perforation. 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

0815Sep 2021: 0Oct 2021: 1Nov 2021: 0Dec 2021: 12022Jan 2022: 0Feb 2022: 1Mar 2022: 1Apr 2022: 1May 2022: 1Jun 2022: 0Jul 2022: 0Aug 2022: 0Sep 2022: 0Oct 2022: 0Nov 2022: 0Dec 2022: 02023Jan 2023: 2Feb 2023: 0Mar 2023: 1Apr 2023: 2May 2023: 0Jun 2023: 0Jul 2023: 0Aug 2023: 0Sep 2023: 0Oct 2023: 1Nov 2023: 0Dec 2023: 12024Jan 2024: 15Feb 2024: 0Mar 2024: 0Apr 2024: 1May 2024: 1Jun 2024: 0Jul 2024: 1Aug 2024: 0Sep 2024: 0Oct 2024: 1Nov 2024: 0Dec 2024: 22025Jan 2025: 1Feb 2025: 0Mar 2025: 0Apr 2025: 1May 2025: 1Jun 2025: 1Jul 2025: 0Aug 2025: 3Sep 2025: 1Oct 2025: 0Nov 2025: 1Dec 2025: 02026Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 1May 2026: 1Jun 2026: 1Jul 2026: 0Aug 2026: 0

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

012232013: 720132015: 72016: 1020162017: 232018: 1520182019: 142020: 1220202021: 212022: 420222023: 72024: 2120242025: 92026: 32026

Event type and report source

Event type, as classified on the report

Death0.7%1
Injury32%49
Malfunction67.3%103
Other0%0
Not given0%0

Who filed the report

Manufacturer report98.7%151
Voluntary report0%0
User facility report0%0
Distributor report1.3%2
Not given0%0

Grey bar: all 1,322 reports carrying product code MQR. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Activation, positioning or separation problem2717.6%11.9%
Delivery system failure2113.7%1.6%
Breakthe device broke127.8%7.9%
Activation failure95.9%6.4%
Off-label use63.9%0.4%
Improper or incorrect procedure or method53.3%0.7%
Material deformation53.3%4.4%
Material twisted/bent53.3%1%
Migrationthe device moved from where it was placed53.3%2%
Obstruction of flow42.6%0.8%
Deformation due to compressive stress32%0.2%
Kinkedthe tube or line kinked21.3%1.2%
Mechanical problema mechanical problem21.3%0.2%
Migration or expulsion of device21.3%5.7%
Activation problem10.7%0.3%
Dent in material10.7%0%
Fracturea broken bone10.7%1.1%
Material separation10.7%0.1%
Premature activation10.7%4.9%
Structural problem10.7%0%

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
Obstruction/occlusion2113.7%
Occlusion74.6%
Perforation74.6%
Bowel perforation53.3%
Foreign body in patientpart of a device left in the patient42.6%
Discomfortdiscomfort32%
Failure of implant32%
Painpain, site not specified21.3%
Abdominal cramps10.7%
Abdominal painstomach or belly pain10.7%
Alteration in body temperature10.7%
Bacterial infectiona bacterial infection10.7%
Blood loss10.7%
Deaththe patient died; cause not stated by this term10.7%
Diarrhea10.7%

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

In context

MeasureEvolution Colonic Controlled-Release Stent - UncoveredProduct code MQRAll MAUDE reports
Reports1531,32226,136,888
Share of that pool—11.6%0%
Classified as death, per 1,000 reports7799
Classified as injury32%47.4%36.2%
Classified as malfunction67.3%44.6%62.3%
Filed by the manufacturer98.7%98.9%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 MQR

BrandReportsLatest 12 monthsClassified as death
WallFlex? Colonic513235.8%
Wallstent Enteral Endoprosthesis162010.5%
Evolution Duodenal Controlled-Release Stent - Uncovered20350.5%
Evolution Biliary Controlled-Release Stent - Fully Covered600990.2%
WALLSTENT Endoprosthesis364141.4%

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 Evolution Colonic Controlled-Release Stent - Uncovered reports

How many FDA reports name Evolution Colonic Controlled-Release Stent - Uncovered?

153 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 5 in the latest 12 months.

What kinds of events are reported?

malfunction (67.3%), injury (32%) and death (0.7%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

activation, positioning or separation problem (17.6%), delivery system failure (13.7%), break (7.8%), activation failure (5.9%) and off-label use (3.9%). These are FDA's device problem codes as entered on the report.

Who files these reports?

manufacturer reports (98.7%) and distributor reports (1.3%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.

Do these reports show that Evolution Colonic Controlled-Release Stent - Uncovered 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.