Devices › Prosthesis, hip, semi-constrained, metal/metal, resurfacing
Device brand name · Prosthesis hip semi-constrained metal/metal resurfacing
Acetlr Cup Hap 56mm W/ Imptr: medical device reports filed with FDA
181 reports name it, 2015–2025. Manufacturer given most often on reports: Smith & Nephew Orthopaedics. Product code NXT.
- 181
- device reports naming the brand
- 0% of all MAUDE reports · about 16 a year
- 1
- reports, 12 months to August 2026
- 4 in the 12 months before
- 1.1%
- classified as malfunction
- 1.7% across the product code
- 0.6%
- classified as death, as reported
- 1 reports · not verified by FDA
181 medical device reports received by FDA name the brand "Acetlr Cup Hap 56mm W/ Imptr" (prosthesis hip semi-constrained metal/metal resurfacing); the manufacturer given most often on reports is Smith & Nephew Orthopaedics; received from February 2015 to October 2025. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.
1 reports arrived in the 12 months to August 2026, down 75% from 4 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 (98.3%), malfunction (1.1%) and death (0.6%); across all prosthesis, hip, semi-constrained, metal/metal, resurfacing reports (product code NXT) death is recorded in 0.3% and malfunction in 1.7%. Event type is the reporter's classification of the report, not a verified outcome.
The device problems coded most often are biocompatibility (26%), insufficient device problem information (13.8%) and patient device interaction problem (11.6%). The patient problems coded most often are pain, metal related pathology and injury. 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
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
Event type and report source
Event type, as classified on the report
Who filed the report
Grey bar: all 6,888 reports carrying product code NXT. Event type is the filer's classification and is not verified by FDA.
Device problems coded
| Device problem (FDA code) | Reports | Share | Share across product code |
|---|---|---|---|
| Biocompatibility | 47 | 26% | 11.6% |
| Insufficient device problem information | 25 | 13.8% | 35.4% |
| Patient device interaction problem | 21 | 11.6% | 6.4% |
| Patient-device incompatibilitythe device did not suit the patient | 7 | 3.9% | 3% |
| Material fragmentation | 5 | 2.8% | 0.6% |
| Compatibility problem | 4 | 2.2% | 1.2% |
| Device dislodged or dislocated | 4 | 2.2% | 1.8% |
| Fracturea broken bone | 4 | 2.2% | 2.3% |
| Noise, audible | 4 | 2.2% | 1.5% |
| Device operates differently than expectedthe device behaved unexpectedly | 3 | 1.7% | 3.4% |
| Metal shedding debris | 3 | 1.7% | 4.4% |
| Migrationthe device moved from where it was placed | 3 | 1.7% | 0.5% |
| Corrodedthe device corroded | 2 | 1.1% | 0.7% |
| Degraded | 2 | 1.1% | 0.3% |
| Device appears to trigger rejection | 2 | 1.1% | 0.3% |
| Loosening of implant not related to bone-ingrowth | 2 | 1.1% | 0.9% |
| Loss of osseointegration | 2 | 1.1% | 0.4% |
| Naturally worn | 2 | 1.1% | 0.9% |
| Breakthe device broke | 1 | 0.6% | 1.5% |
| Device slipped | 1 | 0.6% | 2.5% |
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) | Reports | Share |
|---|---|---|
| Painpain, site not specified | 68 | 37.6% |
| Metal related pathology | 54 | 29.8% |
| Injurya physical injury | 45 | 24.9% |
| Toxicity | 41 | 22.7% |
| Failure of implant | 33 | 18.2% |
| Test result | 16 | 8.8% |
| Osteolysis | 9 | 5% |
| Swellingswelling | 8 | 4.4% |
| Ambulation or postural difficulties | 7 | 3.9% |
| Loss of range of motion | 7 | 3.9% |
| Limited mobility of the implanted joint | 6 | 3.3% |
| Reactiona reaction, type not specified | 6 | 3.3% |
| Bone fracture(s) | 5 | 2.8% |
| Cyst(s) | 5 | 2.8% |
| Discomfortdiscomfort | 5 | 2.8% |
Patient problem codes are present mainly in reports filed since 2019 and are often blank.
In context
| Measure | Acetlr Cup Hap 56mm W/ Imptr | Product code NXT | All MAUDE reports |
|---|---|---|---|
| Reports | 181 | 6,888 | 26,136,888 |
| Share of that pool | — | 2.6% | 0% |
| Classified as death, per 1,000 reports | 6 | 3 | 9 |
| Classified as injury | 98.3% | 95.5% | 36.2% |
| Classified as malfunction | 1.1% | 1.7% | 62.3% |
| Filed by the manufacturer | 100% | 98.6% | 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 NXT
| Brand | Reports | Latest 12 months | Classified as death |
|---|---|---|---|
| Bhr | 2,275 | 0 | 0% |
| R3 | 424 | 0 | 0.2% |
| Unkn Birmingham Hip Resurfacing Bhr Cup Unkn Type | 227 | 0 | 0.9% |
| Acetlr Cup Hap 52mm W/ Imptr | 167 | 0 | 0% |
| Cormet | 161 | 0 | 0% |
| Cormet Resurfacing | 162 | 0 | 0% |
| Bhr Acetabular Cup | 150 | 0 | 0% |
| Conserve R Plus Cup | 1,328 | 0 | 0% |
| Asr Acetabular Implant 60 | 426 | 0 | 0.7% |
| Trinity | 673 | 60 | 0.1% |
| Unknown Hip Implant | 1,114 | 9 | 0.6% |
| Total Asr Fem Imp Size 46 | 534 | 0 | 0% |
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 Acetlr Cup Hap 56mm W/ Imptr reports
How many FDA reports name Acetlr Cup Hap 56mm W/ Imptr?
181 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 1 in the latest 12 months.
What kinds of events are reported?
injury (98.3%), malfunction (1.1%) and death (0.6%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.
What device problems are coded?
biocompatibility (26%), insufficient device problem information (13.8%), patient device interaction problem (11.6%), patient-device incompatibility (3.9%) and material fragmentation (2.8%). 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 Acetlr Cup Hap 56mm W/ Imptr 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.