Reported Reactions

Devices › Sensor, glucose, invasive

Device brand name · Sensor glucose invasive

Starter Kit Mmt-7821ww Gst4c Ous: medical device reports filed with FDA

876 reports name it, 2019–2025. Manufacturer given most often on reports: Medtronic Minimed. Product code MDS.

876
device reports naming the brand
0% of all MAUDE reports · about 122 a year
1
reports, 12 months to August 2026
11 in the 12 months before
99.8%
classified as malfunction
94.9% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 876 reports that name the brand "Starter Kit Mmt-7821ww Gst4c Ous" (sensor glucose invasive), received between May 2019 and September 2025; the manufacturer given most often on reports is Medtronic Minimed. Spellings of one product vary from report to report.

1 reports arrived in the 12 months to August 2026, down 91% from 11 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 (99.8%) and injury (0.2%); 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 battery problem (52.1%), wireless communication problem (25%) and communication or transmission problem (22.4%). The patient problems coded most often are hypoglycemia, discomfort and bone cement implantation syndrome. 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

0102204Sep 2021: 0Oct 2021: 0Nov 2021: 0Dec 2021: 02022Jan 2022: 0Feb 2022: 0Mar 2022: 167Apr 2022: 3May 2022: 6Jun 2022: 3Jul 2022: 204Aug 2022: 14Sep 2022: 51Oct 2022: 21Nov 2022: 23Dec 2022: 222023Jan 2023: 141Feb 2023: 79Mar 2023: 19Apr 2023: 19May 2023: 8Jun 2023: 7Jul 2023: 14Aug 2023: 9Sep 2023: 0Oct 2023: 9Nov 2023: 6Dec 2023: 72024Jan 2024: 14Feb 2024: 6Mar 2024: 2Apr 2024: 2May 2024: 2Jun 2024: 1Jul 2024: 2Aug 2024: 0Sep 2024: 3Oct 2024: 2Nov 2024: 1Dec 2024: 12025Jan 2025: 2Feb 2025: 0Mar 2025: 1Apr 2025: 0May 2025: 1Jun 2025: 0Jul 2025: 0Aug 2025: 0Sep 2025: 1Oct 2025: 0Nov 2025: 0Dec 2025: 02026Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 0Jul 2026: 0Aug 2026: 0

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

02575142019: 320192022: 51420222023: 31820232024: 3620242025: 52025

Event type and report source

Event type, as classified on the report

Death0%0
Injury0.2%2
Malfunction99.8%874
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%876
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
Battery problema problem with the battery45652.1%1.5%
Wireless communication problema wireless connection problem21925%21.3%
Communication or transmission problemthe device could not communicate or transmit19622.4%2.7%
Display or visual feedback problem465.3%0.6%
Failure of device to self-test111.3%0.1%
Breakthe device broke101.1%0.8%
Calibration problem91%0.3%
Inappropriate or unexpected reset30.3%1.1%
Incorrect, inadequate or imprecise result or readings30.3%0.6%
Charging problem10.1%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
Hypoglycemialow blood sugar40.5%
Discomfortdiscomfort20.2%
Bone cement implantation syndrome10.1%
Hyperglycemiahigh blood sugar10.1%
Loss of consciousnesspassing out10.1%

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

In context

MeasureStarter Kit Mmt-7821ww Gst4c OusProduct code MDSAll MAUDE reports
Reports876282,10226,136,888
Share of that pool—0.3%0%
Classified as death, per 1,000 reports019
Classified as injury0.2%4.8%36.2%
Classified as malfunction99.8%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 Starter Kit Mmt-7821ww Gst4c Ous reports

How many FDA reports name Starter Kit Mmt-7821ww Gst4c Ous?

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

What kinds of events are reported?

malfunction (99.8%) and injury (0.2%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

battery problem (52.1%), wireless communication problem (25%), communication or transmission problem (22.4%), display or visual feedback problem (5.3%) and failure of device to self-test (1.3%). 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 Starter Kit Mmt-7821ww Gst4c Ous 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.