Reported Reactions

Devices › Sensor, glucose, invasive

Device brand name · Sensor glucose invasive

Guardian iOS app: medical device reports filed with FDA

690 reports name it, 2022–2026. Manufacturer given most often on reports: Medtronic Minimed. Product code MDS.

690
device reports naming the brand
0% of all MAUDE reports · about 173 a year
57
reports, 12 months to August 2026
77 in the 12 months before
100%
classified as malfunction
94.9% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

690 medical device reports received by FDA name the brand "Guardian iOS app" (sensor glucose invasive); the manufacturer given most often on reports is Medtronic Minimed; received from July 2022 to August 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

57 reports arrived in the 12 months to August 2026, down 26% from 77 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 sensor, glucose, invasive reports (product code MDS) death is recorded in 0.1% and malfunction in 94.9%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are wireless communication problem (66.2%), computer software problem (34.8%) and device alarm system (3.3%). The patient problems coded most often are discomfort, hemorrhage/blood loss/bleeding and appropriate clinical signs, symptoms and conditions term/code not available. 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

04589Sep 2021: 0Oct 2021: 0Nov 2021: 0Dec 2021: 02022Jan 2022: 0Feb 2022: 0Mar 2022: 0Apr 2022: 0May 2022: 0Jun 2022: 0Jul 2022: 1Aug 2022: 0Sep 2022: 7Oct 2022: 10Nov 2022: 61Dec 2022: 292023Jan 2023: 11Feb 2023: 7Mar 2023: 19Apr 2023: 24May 2023: 13Jun 2023: 20Jul 2023: 15Aug 2023: 20Sep 2023: 10Oct 2023: 21Nov 2023: 21Dec 2023: 172024Jan 2024: 89Feb 2024: 16Mar 2024: 26Apr 2024: 24May 2024: 22Jun 2024: 13Jul 2024: 48Aug 2024: 12Sep 2024: 10Oct 2024: 8Nov 2024: 7Dec 2024: 142025Jan 2025: 5Feb 2025: 0Mar 2025: 7Apr 2025: 7May 2025: 6Jun 2025: 3Jul 2025: 4Aug 2025: 6Sep 2025: 6Oct 2025: 6Nov 2025: 9Dec 2025: 32026Jan 2026: 5Feb 2026: 4Mar 2026: 5Apr 2026: 5May 2026: 3Jun 2026: 1Jul 2026: 9Aug 2026: 1

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

01452892022: 10820222023: 19820232024: 28920242025: 6220252026: 332026

Event type and report source

Event type, as classified on the report

Death0%0
Injury0%0
Malfunction100%690
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%690
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 282,102 reports carrying product code MDS. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Wireless communication problema wireless connection problem45766.2%21.3%
Computer software problema software problem24034.8%1.2%
Device alarm system233.3%0.2%
Communication or transmission problemthe device could not communicate or transmit71%2.7%
Application network problem40.6%0%
Data problem10.1%0.1%
Inappropriate or unexpected reset10.1%1.1%

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)ReportsShare
Discomfortdiscomfort30.4%
Hemorrhage/blood loss/bleeding20.3%
Appropriate clinical signs, symptoms and conditions term/code not available10.1%
Hyperglycemiahigh blood sugar10.1%
Hypoglycemialow blood sugar10.1%

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

In context

MeasureGuardian iOS appProduct code MDSAll MAUDE reports
Reports690282,10226,136,888
Share of that pool—0.2%0%
Classified as death, per 1,000 reports019
Classified as injury0%4.8%36.2%
Classified as malfunction100%94.9%62.3%
Filed by the manufacturer100%99.6%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 MDS

BrandReportsLatest 12 monthsClassified as death
Dexcom G5 Mobile Continuous Glucose Monitoring System332,49260%
Dexcom G4 Platinum Continuous Glucose Monitoring System53,68100.1%
G4 Platinum Continuous Glucose Monitoring System48,90600.1%
Dexcom G4 Platinum Continuous Glucose Monitoring System Dexcom Share System17,71700.1%
Xmtr MMT-7811NA GST3C Lockout17,012650%
Animas Vibe88,70300%
Paradigm Real-Time Insulin Infusion Pump126,28200.3%
Unknown XMTR4,4312,0270%
Carelink Personal Mmt-73333,6802330%
Guardian Link 3 OUS6,6637330%
Ni32,9391,5871.8%
Dexcom G4 Platinum Continuous Monitoring System Dexcom Share System2,29300.3%
Paradigm Real-Time Revel Insulin Infusion Pump178,69100.6%
Transmitter Mmt-7841zw Gst5g Ous31,57212,3510%
Xmtr Mmt-7821lna Gst4c Replacement1,685130%

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 Guardian iOS app reports

How many FDA reports name Guardian iOS app?

690 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 57 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?

wireless communication problem (66.2%), computer software problem (34.8%), device alarm system (3.3%), communication or transmission problem (1%) and application network problem (0.6%). 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 Guardian iOS app 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.