Reported Reactions

Devices › Oxygenator, cardiopulmonary bypass

Device brand name · Oxygenator cardiopulmonary bypass

Affinity Nt Balance: medical device reports filed with FDA

271 reports name it, 2021–2026. Manufacturer given most often on reports: Perfusion Systems. Product code DTZ.

271
device reports naming the brand
0% of all MAUDE reports · about 51 a year
150
reports, 12 months to August 2026
75 in the 12 months before
95.2%
classified as malfunction
78.2% across the product code
0.4%
classified as death, as reported
1 reports · not verified by FDA

FDA's MAUDE database holds 271 reports that name the brand "Affinity Nt Balance" (oxygenator cardiopulmonary bypass), received between March 2021 and August 2026; the manufacturer given most often on reports is Perfusion Systems. Spellings of one product vary from report to report.

150 reports arrived in the 12 months to August 2026, up 100% from 75 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 (95.2%), injury (4.4%) and death (0.4%); across all oxygenator, cardiopulmonary bypass reports (product code DTZ) death is recorded in 4.2% and malfunction in 78.2%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are fluid/blood leak (48.3%), gas output problem (35.1%) and crack (7.7%). The patient problems coded most often are hemorrhage/blood loss/bleeding, hypoxia and loss of vision. 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

02550Sep 2021: 1Oct 2021: 0Nov 2021: 0Dec 2021: 02022Jan 2022: 0Feb 2022: 0Mar 2022: 0Apr 2022: 1May 2022: 1Jun 2022: 2Jul 2022: 2Aug 2022: 0Sep 2022: 1Oct 2022: 0Nov 2022: 2Dec 2022: 02023Jan 2023: 1Feb 2023: 1Mar 2023: 1Apr 2023: 3May 2023: 3Jun 2023: 11Jul 2023: 0Aug 2023: 2Sep 2023: 2Oct 2023: 0Nov 2023: 1Dec 2023: 12024Jan 2024: 0Feb 2024: 0Mar 2024: 0Apr 2024: 1May 2024: 2Jun 2024: 2Jul 2024: 0Aug 2024: 3Sep 2024: 2Oct 2024: 5Nov 2024: 3Dec 2024: 12025Jan 2025: 4Feb 2025: 2Mar 2025: 6Apr 2025: 11May 2025: 10Jun 2025: 2Jul 2025: 8Aug 2025: 21Sep 2025: 7Oct 2025: 18Nov 2025: 12Dec 2025: 92026Jan 2026: 5Feb 2026: 3Mar 2026: 8Apr 2026: 9May 2026: 8Jun 2026: 9Jul 2026: 50Aug 2026: 12

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

0551102021: 320212022: 920222023: 2620232024: 1920242025: 11020252026: 1042026

Event type and report source

Event type, as classified on the report

Death0.4%1
Injury4.4%12
Malfunction95.2%258
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%271
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 10,703 reports carrying product code DTZ. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Fluid/blood leak13148.3%23.8%
Gas output problem9535.1%3.4%
Crackthe device cracked217.7%2.6%
Increase in pressure207.4%7%
Material puncture/hole114.1%0.5%
Obstruction of flow93.3%2.4%
Material deformation83%1.1%
Material separation62.2%1.6%
Air/gas in device51.8%1.4%
Breakthe device broke10.4%3.3%
Fracturea broken bone10.4%0.8%
Packaging problem10.4%1.3%

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
Hemorrhage/blood loss/bleeding3713.7%
Hypoxialow oxygen10.4%
Loss of vision10.4%
Low blood pressure/ hypotension10.4%

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

In context

MeasureAffinity Nt BalanceProduct code DTZAll MAUDE reports
Reports27110,70326,136,888
Share of that pool—2.5%0%
Classified as death, per 1,000 reports4429
Classified as injury4.4%14.5%36.2%
Classified as malfunction95.2%78.2%62.3%
Filed by the manufacturer100%93.3%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 DTZ

BrandReportsLatest 12 monthsClassified as death
Fusion Hollow Fiber Oxygenator1,5159960.7%
Capiox Fx Oxygenator40901.5%
Tubing Set33610414%
Sterile Fx25rwc W/ Res27902.5%
Sterile Fx25rec W/Res27701.4%
Oxygenator Cardiopulmonary Bypass27404.7%
Hls Set Advanced215012.1%
Capiox FX Advance Hollow Fiber Oxygenator w Integrated AF w Hardshell Res.160686.3%
Hlm Tubing Set W/Bioline Coating43907.1%
Navilyst Medical25200.4%
Cardiovascular Procedure Kit55301.3%
Shunt Sensor Sys50071200.1%
AngioDynamics174141.7%
Heart Lung Machine1,8732833.7%
Apex876781.3%

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 Affinity Nt Balance reports

How many FDA reports name Affinity Nt Balance?

271 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 150 in the latest 12 months.

What kinds of events are reported?

malfunction (95.2%), injury (4.4%) and death (0.4%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

fluid/blood leak (48.3%), gas output problem (35.1%), crack (7.7%), increase in pressure (7.4%) and material puncture/hole (4.1%). 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 Affinity Nt Balance 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.