Devices › System, test, automated blood grouping and antibody
Device brand name · Automated blood bank analyser system
Tango Optimo: medical device reports filed with FDA
158 reports name it, 2011–2018. Manufacturer given most often on reports: Bio-Rad Medical Diagnostics. Product code KSZ.
- 158
- device reports naming the brand
- 0% of all MAUDE reports · about 10 a year
- 0
- reports, 12 months to August 2026
- 0 in the 12 months before
- 100%
- classified as malfunction
- 96.2% across the product code
- 0%
- classified as death, as reported
- 0 reports · not verified by FDA
FDA's MAUDE database holds 158 reports that name the brand "Tango Optimo" (automated blood bank analyser system), received between March 2011 and October 2018; the manufacturer given most often on reports is Bio-Rad Medical Diagnostics. 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 (100%); across all system, test, automated blood grouping and antibody reports (product code KSZ) death is recorded in 0.1% and malfunction in 96.2%. Event type is the reporter's classification of the report, not a verified outcome.
The device problems coded most often are false positive result (38%), incorrect or inadequate test results (17.1%) and false negative result (15.8%). The patient problems coded most often are test result, anemia and bruise/contusion. 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 Tango Optimo was received in the five years to August 2026; the latest was received in October 2018.
By year received
Event type and report source
Event type, as classified on the report
Who filed the report
Grey bar: all 10,406 reports carrying product code KSZ. 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 |
|---|---|---|---|
| False positive result | 60 | 38% | 10.8% |
| Incorrect or inadequate test results | 27 | 17.1% | 13.1% |
| False negative result | 25 | 15.8% | 52.9% |
| Defective devicethe device was defective | 7 | 4.4% | 1% |
| Improper or incorrect procedure or method | 5 | 3.2% | 0.8% |
| Contamination of device ingredient or reagent | 3 | 1.9% | 0.2% |
| Device ingredient or reagent problem | 3 | 1.9% | 0.1% |
| Device operates differently than expectedthe device behaved unexpectedly | 3 | 1.9% | 2% |
| Data problem | 2 | 1.3% | 0.1% |
| Device displays incorrect message | 2 | 1.3% | 0.6% |
| Device reprocessing problem | 2 | 1.3% | 0% |
| Failure to deliverthe device did not deliver the dose or item | 2 | 1.3% | 0.3% |
| False reading from device non-compliance | 2 | 1.3% | 0.5% |
| Incorrect, inadequate or imprecise result or readings | 2 | 1.3% | 5.2% |
| Poor quality image | 2 | 1.3% | 0% |
| Air leak | 1 | 0.6% | 0% |
| Application program problem | 1 | 0.6% | 0% |
| Bent | 1 | 0.6% | 0.6% |
| Complete blockage | 1 | 0.6% | 0% |
| Component falling | 1 | 0.6% | 0.1% |
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 |
|---|---|---|
| Test result | 8 | 5.1% |
| Anemialow red blood cells | 1 | 0.6% |
| Bruise/contusion | 1 | 0.6% |
| Chemical exposure | 1 | 0.6% |
| Exposure to body fluids | 1 | 0.6% |
| Hemolysis | 1 | 0.6% |
| Hemorrhage/blood loss/bleeding | 1 | 0.6% |
| Injurya physical injury | 1 | 0.6% |
| Laceration(s) | 1 | 0.6% |
| No patient involvement | 1 | 0.6% |
| Reactiona reaction, type not specified | 1 | 0.6% |
Patient problem codes are present mainly in reports filed since 2019 and are often blank.
In context
| Measure | Tango Optimo | Product code KSZ | All MAUDE reports |
|---|---|---|---|
| Reports | 158 | 10,406 | 26,136,888 |
| Share of that pool | — | 1.5% | 0% |
| Classified as death, per 1,000 reports | 0 | 1 | 9 |
| Classified as injury | 0% | 1% | 36.2% |
| Classified as malfunction | 100% | 96.2% | 62.3% |
| Filed by the manufacturer | 100% | 92.4% | 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 KSZ
| Brand | Reports | Latest 12 months | Classified as death |
|---|---|---|---|
| Ortho Provue | 1,445 | 0 | 0% |
| Galileo Echo | 896 | 0 | 0% |
| Galileo | 701 | 0 | 0.1% |
| Capture-R Ready-Screen 3 | 501 | 0 | 0% |
| 0 8% Resolve Panel A | 399 | 0 | 0% |
| Ortho Provue Analyzer | 343 | 0 | 0% |
| Echo | 249 | 0 | 0% |
| Galileo Neo | 177 | 0 | 0% |
| 0 8% Surgiscreen | 166 | 0 | 0% |
| 0 8% Selectogen | 160 | 0 | 0% |
| Mts A/B/D Monoclonal And Reverse Grouping Card | 186 | 0 | 0% |
| Ortho Summit Sample Handling System | 4,182 | 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 Tango Optimo reports
How many FDA reports name Tango Optimo?
158 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 (100%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.
What device problems are coded?
false positive result (38%), incorrect or inadequate test results (17.1%), false negative result (15.8%), defective device (4.4%) and improper or incorrect procedure or method (3.2%). 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 Tango Optimo 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.