Reported Reactions

Devices › Ventilator, non-continuous (respirator)

Device brand name · Ventilator non-continuous respirator

REMstar AutoA-Flex: medical device reports filed with FDA

8,659 reports name it, 2021–2026. Manufacturer given most often on reports: Respironics. Product code BZD.

8,659
device reports naming the brand
0% of all MAUDE reports · about 1,733 a year
1,732
reports, 12 months to August 2026
1,898 in the 12 months before
82.2%
classified as malfunction
80.7% across the product code
1.1%
classified as death, as reported
92 reports · not verified by FDA

8,659 medical device reports received by FDA name the brand "REMstar AutoA-Flex" (ventilator non-continuous respirator); the manufacturer given most often on reports is Respironics; received from July 2021 to August 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

1,732 reports arrived in the 12 months to August 2026, close to the 1,898 of 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 (82.2%), injury (16.7%) and death (1.1%); across all ventilator, non-continuous (respirator) reports (product code BZD) death is recorded in 1.5% and malfunction in 80.7%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are degraded (99.2%), contamination (13.7%) and overheating of device (3%). The patient problems coded most often are headache, cancer and dizziness. 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

05531,106Sep 2021: 1Oct 2021: 5Nov 2021: 15Dec 2021: 232022Jan 2022: 46Feb 2022: 68Mar 2022: 85Apr 2022: 129May 2022: 448Jun 2022: 679Jul 2022: 989Aug 2022: 201Sep 2022: 149Oct 2022: 100Nov 2022: 223Dec 2022: 882023Jan 2023: 84Feb 2023: 79Mar 2023: 36Apr 2023: 35May 2023: 48Jun 2023: 47Jul 2023: 29Aug 2023: 46Sep 2023: 55Oct 2023: 38Nov 2023: 43Dec 2023: 602024Jan 2024: 44Feb 2024: 112Mar 2024: 108Apr 2024: 179May 2024: 182Jun 2024: 261Jul 2024: 206Aug 2024: 84Sep 2024: 24Oct 2024: 395Nov 2024: 146Dec 2024: 602025Jan 2025: 175Feb 2025: 484Mar 2025: 510Apr 2025: 20May 2025: 8Jun 2025: 43Jul 2025: 29Aug 2025: 4Sep 2025: 9Oct 2025: 37Nov 2025: 1,106Dec 2025: 162026Jan 2026: 75Feb 2026: 146Mar 2026: 117Apr 2026: 17May 2026: 35Jun 2026: 108Jul 2026: 63Aug 2026: 3

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

01,6033,2052021: 4820212022: 3,20520222023: 60020232024: 1,80120242025: 2,44120252026: 5642026

Event type and report source

Event type, as classified on the report

Death1.1%92
Injury16.7%1,445
Malfunction82.2%7,122
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%8,659
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 303,240 reports carrying product code BZD. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Degraded8,59499.2%95.4%
Contamination1,18913.7%4.4%
Overheating of device2593%0.7%
Thermal decomposition of device150.2%0.2%
Material integrity problema problem with the device material130.2%0.2%
Contamination /decontamination problem120.1%0.1%
Device contamination with chemical or other material120.1%0.1%
Device emits odor70.1%0.2%
Noise, audible50.1%0.1%
Excessive heating40%0.1%
Failure to power up40%0.1%
Device contaminated during manufacture or shipping20%0%
Fire20%0.1%
Insufficient device problem information20%0.2%
Sparking20%0%
Unraveled material20%0%
Activation problem10%0%
Breakthe device broke10%0%
Component missing10%0%
Contamination of device ingredient or reagent10%0%

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
Headachehead pain6287.3%
Cancer6037%
Dizzinesslight-headedness or unsteadiness5145.9%
Asthmaasthma4134.8%
Eye irritationeye irritation2512.9%
Respiratory tract infectiona respiratory infection2462.8%
Dyspneashortness of breath2302.7%
Sore throat2072.4%
Inflammationinflammation1922.2%
Skin inflammation/ irritation1692%
Nauseafeeling sick1621.9%
Appropriate clinical signs, symptoms and conditions term/code not available1411.6%
Vomitingbeing sick1381.6%
Coughcough1341.5%
Hypersensitivity/allergic reaction1201.4%

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

In context

MeasureREMstar AutoA-FlexProduct code BZDAll MAUDE reports
Reports8,659303,24026,136,888
Share of that pool—2.9%0%
Classified as death, per 1,000 reports11159
Classified as injury16.7%17.7%36.2%
Classified as malfunction82.2%80.7%62.3%
Filed by the manufacturer100%99%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 BZD

BrandReportsLatest 12 monthsClassified as death
DreamStation Auto CPAP146,78027,7410.9%
REMstar Auto A-Flex19,6567,0831%
DreamStation Auto BiPAP15,3168711.8%
REMstar Pro C-Flex+14,6434,6891.2%
DreamStation CPAP13,8953362.5%
Philips CPAP Device12,779585.5%
DreamStation CPAP Pro10,7896740.8%
REMstar Auto5,0891,4240.9%
BiPAP Auto BiFlex4,4871,3271.4%
DreamStation4,2101,7031.6%
REMstar Plus C-Flex3,6821,5820.8%
Dreamstation Auto3,150380.3%
DreamStation BiPAP Pro3,0491081.9%
REMstar Plus2,5814991.9%
Philips CPAP2,470114.3%

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 REMstar AutoA-Flex reports

How many FDA reports name REMstar AutoA-Flex?

8,659 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 1,732 in the latest 12 months.

What kinds of events are reported?

malfunction (82.2%), injury (16.7%) and death (1.1%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

degraded (99.2%), contamination (13.7%), overheating of device (3%), thermal decomposition of device (0.2%) and material integrity problem (0.2%). 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 REMstar AutoA-Flex 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.