Devices › Unit, cautery, thermal, ac-powered
Device brand name · Unit cautery thermal ac-powered
T.W. Power Supply: medical device reports filed with FDA
614 reports name it, 2012–2026. Manufacturer given most often on reports: Maquet Cardiovascular. Product code HQO.
- 614
- device reports naming the brand
- 0% of all MAUDE reports · about 44 a year
- 115
- reports, 12 months to August 2026
- 55 in the 12 months before
- 97.2%
- classified as malfunction
- 94.6% across the product code
- 0%
- classified as death, as reported
- 0 reports · not verified by FDA
FDA's MAUDE database holds 614 reports that name the brand "T.W. Power Supply" (unit cautery thermal ac-powered), received between September 2012 and August 2026; the manufacturer given most often on reports is Maquet Cardiovascular. Spellings of one product vary from report to report.
115 reports arrived in the 12 months to August 2026, up 109% from 55 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 (97.2%), injury (2.6%) and other (0.2%); across all unit, cautery, thermal, ac-powered reports (product code HQO) death is recorded in 0% and malfunction in 94.6%. Event type is the reporter's classification of the report, not a verified outcome.
The device problems coded most often are failure to deliver energy (28.5%), electrical /electronic property problem (23.1%) and intermittent continuity (8.6%). The patient problems coded most often are no patient involvement, hemorrhage/blood loss/bleeding and surgical procedure. 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 905 reports carrying product code HQO. 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 |
|---|---|---|---|
| Failure to deliver energy | 175 | 28.5% | 27.6% |
| Electrical /electronic property probleman electrical or electronic problem | 142 | 23.1% | 18.2% |
| Intermittent continuity | 53 | 8.6% | 9.1% |
| Breakthe device broke | 34 | 5.5% | 4.6% |
| Intermittent loss of power | 28 | 4.6% | 3.8% |
| Insufficient device problem information | 24 | 3.9% | 2.9% |
| Device stops intermittentlythe device stopped now and then | 20 | 3.3% | 3.1% |
| Failure to power up | 17 | 2.8% | 3.2% |
| Component missing | 16 | 2.6% | 1.8% |
| Power problem | 16 | 2.6% | 2.1% |
| Device operates differently than expectedthe device behaved unexpectedly | 14 | 2.3% | 3.1% |
| Loss of powerthe device lost power | 14 | 2.3% | 3.1% |
| Crackthe device cracked | 10 | 1.6% | 1.7% |
| Detachment of device or device componentpart of the device came off | 8 | 1.3% | 1% |
| Device inoperablethe device could not be used | 6 | 1% | 1.5% |
| Noise, audible | 6 | 1% | 1% |
| Device remains activated | 5 | 0.8% | 0.7% |
| Mechanical problema mechanical problem | 5 | 0.8% | 0.7% |
| Smoking | 5 | 0.8% | 0.7% |
| Connection problema connection problem | 4 | 0.7% | 0.9% |
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 |
|---|---|---|
| No patient involvement | 61 | 9.9% |
| Hemorrhage/blood loss/bleeding | 2 | 0.3% |
| Surgical procedure | 2 | 0.3% |
| Blood loss | 1 | 0.2% |
| Bruise/contusion | 1 | 0.2% |
| Burn(s)a burn | 1 | 0.2% |
| Partial thickness (second degree) burn | 1 | 0.2% |
| Perforation of vessels | 1 | 0.2% |
Patient problem codes are present mainly in reports filed since 2019 and are often blank.
In context
| Measure | T.W. Power Supply | Product code HQO | All MAUDE reports |
|---|---|---|---|
| Reports | 614 | 905 | 26,136,888 |
| Share of that pool | — | 67.8% | 0% |
| Classified as death, per 1,000 reports | 0 | 0 | 9 |
| Classified as injury | 2.6% | 4.6% | 36.2% |
| Classified as malfunction | 97.2% | 94.6% | 62.3% |
| Filed by the manufacturer | 100% | 97.1% | 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 HQO
| Brand | Reports | Latest 12 months | Classified as death |
|---|---|---|---|
| HemoPro2 Extension Cable | 539 | 30 | 0% |
| Hemopro2 Adaptor | 167 | 14 | 0% |
| Dc Extension Cable | 262 | 0 | 0% |
| Storz Phacoemulsification Handpiece | 257 | 0 | 0% |
| Valleylab | 2,010 | 353 | 0.3% |
| VasoView Hemopro 2 | 6,633 | 686 | 0% |
| Vasoview Hemopro Evh System | 380 | 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 T.W. Power Supply reports
How many FDA reports name T.W. Power Supply?
614 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 115 in the latest 12 months.
What kinds of events are reported?
malfunction (97.2%), injury (2.6%) and other (0.2%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.
What device problems are coded?
failure to deliver energy (28.5%), electrical /electronic property problem (23.1%), intermittent continuity (8.6%), break (5.5%) and intermittent loss of power (4.6%). 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 T.W. Power Supply 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.