Reported Reactions

Devices › Instrument, biopsy

Device brand name · Knw

Monopty Disposable Core Biopsy Instrument: medical device reports filed with FDA

288 reports name it, 2007–2017. Manufacturer given most often on reports: Bard Peripheral Vascular. Product code KNW.

288
device reports naming the brand
0% of all MAUDE reports · about 15 a year
0
reports, 12 months to August 2026
0 in the 12 months before
97.9%
classified as malfunction
90.5% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 288 reports that name the brand "Monopty Disposable Core Biopsy Instrument" (knw), received between March 2007 and July 2017; the manufacturer given most often on reports is Bard Peripheral Vascular. Spellings of one product vary from report to report.

0 reports arrived in the 12 months to August 2026, and none 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 (97.9%) and injury (2.1%); across all instrument, biopsy reports (product code KNW) death is recorded in 0.1% and malfunction in 90.5%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are break (57.6%), failure to prime (33%) and failure to obtain sample (32.6%). The patient problems coded most often are 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

No report naming Monopty Disposable Core Biopsy Instrument was received in the five years to August 2026; the latest was received in July 2017.

By year received

01352692007: 1020072012: 520122015: 26920152017: 42017

Event type and report source

Event type, as classified on the report

Death0%0
Injury2.1%6
Malfunction97.9%282
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%288
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 24,120 reports carrying product code KNW. 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 broke16657.6%4.6%
Failure to prime9533%3.7%
Failure to obtain sample9432.6%11%
Failure to fire6121.2%30.2%
Noise, audible72.4%0.2%
Self-activation or keying62.1%8.2%
Nonstandard device41.4%1.6%
Device inoperablethe device could not be used31%0.2%
Mechanics altered31%0.1%
Device markings/labelling problema problem with the device markings or label20.7%0.6%
Device misassembled during manufacturing /shipping20.7%0.1%
Compatibility problem10.3%0%
Defective devicethe device was defective10.3%0.4%
Detachment of device or device componentpart of the device came off10.3%1%
Device contamination with chemical or other material10.3%1.5%

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
No patient involvement238%

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

In context

MeasureMonopty Disposable Core Biopsy InstrumentProduct code KNWAll MAUDE reports
Reports28824,12026,136,888
Share of that pool—1.2%0%
Classified as death, per 1,000 reports019
Classified as injury2.1%8.3%36.2%
Classified as malfunction97.9%90.5%62.3%
Filed by the manufacturer100%94.6%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 KNW

BrandReportsLatest 12 monthsClassified as death
EnCor Biopsy Probe5,264150%
Maxcore4,0251,8900%
Bard Max-Core Disposable Core Biopsy Instrument2,65700%
Bard Max-Core Disposable Biopsy Instrument2,33500%
Mtome St Holster/Cables49500%
Mammotome Control Module With Smartvac - 120v33900%
Brevera Breast Biopsy System319690%
Marquee233460%
Asap Biopsy System21300.5%
Max-Core Disposable Core Biopsy Instrument20500%
Mammotome Hardware Holster17300%
Achieve1641250%
Mammotome Control Modules15700%
Radial Jaw 3 Biopsy Forceps30200%
Superdimension22757%

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 Monopty Disposable Core Biopsy Instrument reports

How many FDA reports name Monopty Disposable Core Biopsy Instrument?

288 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 0 in the latest 12 months.

What kinds of events are reported?

malfunction (97.9%) and injury (2.1%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

break (57.6%), failure to prime (33%), failure to obtain sample (32.6%), failure to fire (21.2%) and noise, audible (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 Monopty Disposable Core Biopsy Instrument 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.