Reported Reactions

Devices › Powered laser surgical instrument

Device brand name · Gex laser instrument surgical

Cook Single-Use Holmium Laser Fiber: medical device reports filed with FDA

246 reports name it, 2016–2025. Manufacturer given most often on reports: Cook. Product code GEX.

246
device reports naming the brand
0% of all MAUDE reports · about 24 a year
3
reports, 12 months to August 2026
8 in the 12 months before
88.2%
classified as malfunction
78.1% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 246 reports that name the brand "Cook Single-Use Holmium Laser Fiber" (gex laser instrument surgical), received between March 2016 and October 2025; the manufacturer given most often on reports is Cook. Spellings of one product vary from report to report.

3 reports arrived in the 12 months to August 2026, down 62% from 8 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 (88.2%) and injury (11.8%); across all powered laser surgical instrument reports (product code GEX) death is recorded in 0.2% and malfunction in 78.1%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are break (57.3%), material separation (13%) and fracture (8.1%). The patient problems coded most often are device embedded in tissue or plaque, foreign body in patient and no patient involvement. 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

036Sep 2021: 1Oct 2021: 1Nov 2021: 4Dec 2021: 62022Jan 2022: 3Feb 2022: 4Mar 2022: 4Apr 2022: 2May 2022: 4Jun 2022: 5Jul 2022: 1Aug 2022: 0Sep 2022: 2Oct 2022: 2Nov 2022: 4Dec 2022: 02023Jan 2023: 1Feb 2023: 4Mar 2023: 3Apr 2023: 1May 2023: 0Jun 2023: 2Jul 2023: 2Aug 2023: 2Sep 2023: 1Oct 2023: 1Nov 2023: 1Dec 2023: 22024Jan 2024: 1Feb 2024: 1Mar 2024: 1Apr 2024: 1May 2024: 1Jun 2024: 0Jul 2024: 0Aug 2024: 0Sep 2024: 1Oct 2024: 2Nov 2024: 2Dec 2024: 12025Jan 2025: 0Feb 2025: 0Mar 2025: 0Apr 2025: 0May 2025: 0Jun 2025: 1Jul 2025: 0Aug 2025: 1Sep 2025: 2Oct 2025: 1Nov 2025: 0Dec 2025: 02026Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 0Jul 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

027532016: 520162017: 2420172018: 5320182019: 3820192020: 3020202021: 2920212022: 3120222023: 2020232024: 1120242025: 52025

Event type and report source

Event type, as classified on the report

Death0%0
Injury11.8%29
Malfunction88.2%217
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%246
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 44,283 reports carrying product code GEX. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Breakthe device broke14157.3%18.9%
Material separation3213%0.3%
Fracturea broken bone208.1%12.8%
Crackthe device cracked83.3%0.6%
Device operates differently than expectedthe device behaved unexpectedly41.6%3.6%
Sparking41.6%0.3%
Arcing31.2%0%
Detachment of device or device componentpart of the device came off31.2%4.1%
Device damaged prior to usethe device was damaged before use31.2%0.3%
Energy output problem31.2%0.4%
Material integrity problema problem with the device material31.2%0.9%
Device contaminated during manufacture or shipping20.8%0.2%
Material twisted/bent20.8%0.1%
Contamination /decontamination problem10.4%0%
Defective devicethe device was defective10.4%2.1%
Device contamination with chemical or other material10.4%0%
Failure to deliver energy10.4%0.4%
Intermittent loss of power10.4%0%
Loss of powerthe device lost power10.4%0.3%
Material erosion10.4%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
Device embedded in tissue or plaque135.3%
Foreign body in patientpart of a device left in the patient93.7%
No patient involvement41.6%
Laceration(s)10.4%

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

In context

MeasureCook Single-Use Holmium Laser FiberProduct code GEXAll MAUDE reports
Reports24644,28326,136,888
Share of that pool—0.6%0%
Classified as death, per 1,000 reports029
Classified as injury11.8%20%36.2%
Classified as malfunction88.2%78.1%62.3%
Filed by the manufacturer100%94.9%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 GEX

BrandReportsLatest 12 monthsClassified as death
Greenlight Moxy Fiber Optic9,05900%
WaveLight FS200 Femtosecond Laser4,6534860%
Greenlight Addstat3,38900%
FS Disposable Interface1,4421160%
Greenlight Hps Bph Fiber Optic90600%
Flexiva Tm Tractip High Power Single-Use Laser Fiber62700%
Greenlight Xps Laser System62200.2%
Lumenis Moses 200 D\F\L5822270%
Flexiva Tm High Power Single-Use Laser Fiber56500.2%
Visualase595480.8%
Neuroblate System553124%
SOLTIVE Premium SuperPulsed Laser System5221170%
Moxy5112760%
Moses Pulse4771430%
Angled Delivery Device Greenlight46500%

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 Cook Single-Use Holmium Laser Fiber reports

How many FDA reports name Cook Single-Use Holmium Laser Fiber?

246 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 3 in the latest 12 months.

What kinds of events are reported?

malfunction (88.2%) and injury (11.8%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

break (57.3%), material separation (13%), fracture (8.1%), crack (3.3%) and device operates differently than expected (1.6%). 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 Cook Single-Use Holmium Laser Fiber 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.