Reported Reactions

Devices › Prosthesis, shoulder, semi-constrained, metal/polymer cemented

Device brand name · Shoulder humeral cup

Unknown Shoulder Humeral Cup: medical device reports filed with FDA

252 reports name it, 2018–2026. Manufacturer given most often on reports: Depuy Orthopaedics US. Product code KWS.

252
device reports naming the brand
0% of all MAUDE reports · about 30 a year
12
reports, 12 months to August 2026
22 in the 12 months before
1.2%
classified as malfunction
10.9% across the product code
0.4%
classified as death, as reported
1 reports · not verified by FDA

252 medical device reports received by FDA name the brand "Unknown Shoulder Humeral Cup" (shoulder humeral cup); the manufacturer given most often on reports is Depuy Orthopaedics US; received from February 2018 to February 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

12 reports arrived in the 12 months to August 2026, down 45% from 22 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 injury (98.4%), malfunction (1.2%) and death (0.4%); across all prosthesis, shoulder, semi-constrained, metal/polymer cemented reports (product code KWS) death is recorded in 0.1% and malfunction in 10.9%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are device dislodged or dislocated (46%), insufficient device problem information (6.7%) and naturally worn (6.7%). The patient problems coded most often are joint dislocation, pain and not applicable. 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

048Sep 2021: 3Oct 2021: 3Nov 2021: 0Dec 2021: 02022Jan 2022: 2Feb 2022: 0Mar 2022: 2Apr 2022: 2May 2022: 0Jun 2022: 2Jul 2022: 0Aug 2022: 1Sep 2022: 1Oct 2022: 0Nov 2022: 1Dec 2022: 12023Jan 2023: 1Feb 2023: 1Mar 2023: 2Apr 2023: 0May 2023: 2Jun 2023: 2Jul 2023: 2Aug 2023: 0Sep 2023: 1Oct 2023: 1Nov 2023: 3Dec 2023: 12024Jan 2024: 1Feb 2024: 2Mar 2024: 1Apr 2024: 3May 2024: 3Jun 2024: 0Jul 2024: 1Aug 2024: 2Sep 2024: 1Oct 2024: 2Nov 2024: 1Dec 2024: 02025Jan 2025: 3Feb 2025: 2Mar 2025: 0Apr 2025: 2May 2025: 1Jun 2025: 8Jul 2025: 1Aug 2025: 1Sep 2025: 2Oct 2025: 2Nov 2025: 0Dec 2025: 22026Jan 2026: 3Feb 2026: 3Mar 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

0511012018: 4820182019: 10120192020: 1520202021: 1320212022: 1220222023: 1620232024: 1720242025: 2420252026: 62026

Event type and report source

Event type, as classified on the report

Death0.4%1
Injury98.4%248
Malfunction1.2%3
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%252
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 23,454 reports carrying product code KWS. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Device dislodged or dislocated11646%15.5%
Insufficient device problem information176.7%10.3%
Naturally worn176.7%2.7%
Loose or intermittent connection20.8%2.5%
Detachment of device or device componentpart of the device came off10.4%2%
Fracturea broken bone10.4%7.8%
Noise, audible10.4%0.4%

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
Joint dislocationa dislocated joint11445.2%
Painpain, site not specified4417.5%
Not applicable3815.1%
Joint laxity207.9%
Hematomaa collection of blood under the skin or in tissue156%
Injurya physical injury124.8%
Bone fracture(s)93.6%
Loss of range of motion72.8%
Osteolysis52%
Discomfortdiscomfort41.6%
Limited mobility of the implanted joint41.6%
Swellingswelling31.2%
Appropriate clinical signs, symptoms and conditions term/code not available20.8%
Extraskeletal ossification20.8%
Hypersensitivity/allergic reaction20.8%

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

In context

MeasureUnknown Shoulder Humeral CupProduct code KWSAll MAUDE reports
Reports25223,45426,136,888
Share of that pool—1.1%0%
Classified as death, per 1,000 reports419
Classified as injury98.4%83.5%36.2%
Classified as malfunction1.2%10.9%62.3%
Filed by the manufacturer100%99.4%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 KWS

BrandReportsLatest 12 monthsClassified as death
Rsp Shoulder2,00600%
Djo Surgical4,7132,4480%
Turon Shoulder54700%
Altivate Reverse Shoulder50000%
Unknown Shoulder Glenosphere335240.3%
Modular Center Post Reamer173210%
Compr Metal Impactor342370%
Comp Rvrs 25mm Bsplt Ha+adptr239170%
Altivate Anatomic Shoulder15000%
Foundation Shoulder15200%
Unknown Shoulder Humeral Stems23981.7%
Unknown Shoulder Implant25480.8%
Dxtend Glenosphere Std D38mm32350%
Unknown Shoulder Metaglene305160.3%
Dxtend Metaglene355140%

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 Unknown Shoulder Humeral Cup reports

How many FDA reports name Unknown Shoulder Humeral Cup?

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

What kinds of events are reported?

injury (98.4%), malfunction (1.2%) and death (0.4%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

device dislodged or dislocated (46%), insufficient device problem information (6.7%), naturally worn (6.7%), loose or intermittent connection (0.8%) and detachment of device or device component (0.4%). 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 Unknown Shoulder Humeral Cup 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.