Devices › Shunt, central nervous system and components
Device brand name · Shunt central nervous system and components
Unknown Valve/Shunt: medical device reports filed with FDA
225 reports name it, 2014–2026. Manufacturer given most often on reports: Medtronic Neurosurgery. Product code JXG.
- 225
- device reports naming the brand
- 0% of all MAUDE reports · about 18 a year
- 10
- reports, 12 months to August 2026
- 19 in the 12 months before
- 19.6%
- classified as malfunction
- 31.2% across the product code
- 5.8%
- classified as death, as reported
- 13 reports · not verified by FDA
FDA's MAUDE database holds 225 reports that name the brand "Unknown Valve/Shunt" (shunt central nervous system and components), received between March 2014 and August 2026; the manufacturer given most often on reports is Medtronic Neurosurgery. Spellings of one product vary from report to report.
10 reports arrived in the 12 months to August 2026, down 47% from 19 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 injury (74.7%), malfunction (19.6%) and death (5.8%); across all shunt, central nervous system and components reports (product code JXG) death is recorded in 0.9% and malfunction in 31.2%. Event type is the reporter's classification of the report, not a verified outcome.
The device problems coded most often are insufficient device problem information (16%), device operates differently than expected (15.6%) and complete blockage (6.7%). The patient problems coded most often are therapeutic response, decreased, headache and therapeutic effects, unexpected. 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
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
Event type and report source
Event type, as classified on the report
Who filed the report
Grey bar: all 25,520 reports carrying product code JXG. 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 |
|---|---|---|---|
| Insufficient device problem information | 36 | 16% | 5.2% |
| Device operates differently than expectedthe device behaved unexpectedly | 35 | 15.6% | 2.7% |
| Complete blockage | 15 | 6.7% | 1.5% |
| Breakthe device broke | 12 | 5.3% | 8.4% |
| Infusion or flow problema problem with flow or infusion | 12 | 5.3% | 11% |
| Disconnection | 11 | 4.9% | 2% |
| Occlusion within devicethe device blocked | 8 | 3.6% | 3.9% |
| Fluid/blood leak | 5 | 2.2% | 3% |
| Device appears to trigger rejection | 4 | 1.8% | 0% |
| Fracturea broken bone | 4 | 1.8% | 2.6% |
| Inaccurate flow rate | 4 | 1.8% | 0.8% |
| Migrationthe device moved from where it was placed | 4 | 1.8% | 0.4% |
| Improper flow or infusion | 3 | 1.3% | 0.7% |
| Patient-device incompatibilitythe device did not suit the patient | 3 | 1.3% | 0% |
| Migration or expulsion of device | 2 | 0.9% | 0.5% |
| Calcified | 1 | 0.4% | 0% |
| Defective devicethe device was defective | 1 | 0.4% | 0.4% |
| Device dislodged or dislocated | 1 | 0.4% | 0.7% |
| Loose or intermittent connection | 1 | 0.4% | 0.2% |
| Mechanical jam | 1 | 0.4% | 0.7% |
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 |
|---|---|---|
| Therapeutic response, decreased | 32 | 14.2% |
| Headachehead pain | 24 | 10.7% |
| Therapeutic effects, unexpected | 23 | 10.2% |
| Bacterial infectiona bacterial infection | 11 | 4.9% |
| Cerebrospinal fluid leakage | 10 | 4.4% |
| Intracranial hemorrhage | 10 | 4.4% |
| Complaint, ill-defined | 9 | 4% |
| Deaththe patient died; cause not stated by this term | 9 | 4% |
| Fever | 9 | 4% |
| Ambulation or postural difficulties | 7 | 3.1% |
| Hydrocephalus | 7 | 3.1% |
| Seizures | 6 | 2.7% |
| Vomitingbeing sick | 6 | 2.7% |
| Cognitive changes | 5 | 2.2% |
| Fatiguetiredness | 5 | 2.2% |
Patient problem codes are present mainly in reports filed since 2019 and are often blank.
In context
| Measure | Unknown Valve/Shunt | Product code JXG | All MAUDE reports |
|---|---|---|---|
| Reports | 225 | 25,520 | 26,136,888 |
| Share of that pool | — | 0.9% | 0% |
| Classified as death, per 1,000 reports | 58 | 9 | 9 |
| Classified as injury | 74.7% | 64% | 36.2% |
| Classified as malfunction | 19.6% | 31.2% | 62.3% |
| Filed by the manufacturer | 100% | 95.1% | 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 JXG
| Brand | Reports | Latest 12 months | Classified as death |
|---|---|---|---|
| Hakim Programmable Valve With Prechamber | 948 | 0 | 0.3% |
| Strata | 817 | 163 | 2.2% |
| Hakim Programmable Valve | 693 | 9 | 0.9% |
| Unknown Strata Valve/Shunt | 515 | 0 | 2.3% |
| Hakim Inline Programmable Valve Sg | 343 | 0 | 0% |
| Certas Inlin Vlv Sphn/Unit Cat | 337 | 0 | 0.6% |
| Hakim Valve | 337 | 0 | 0% |
| Certas Inlin Vlv Only W/Sphngd | 327 | 0 | 0.9% |
| NT821731C, EDS 3, GEN ll, NO CATHETER | 326 | 127 | 0% |
| Prog Valve Inline W Sg | 222 | 10 | 0% |
| Hakim Prog Valve Inline Siphonguard | 210 | 0 | 0.5% |
| Programmable Valve In-Line W/Siphonguard | 186 | 0 | 0% |
| Progav 2 0 Valve | 183 | 21 | 0% |
| Unknown Catheter | 270 | 26 | 2.2% |
| Strata 2 Adjustable Valve Regular | 174 | 0 | 0.6% |
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 Unknown Valve/Shunt reports
How many FDA reports name Unknown Valve/Shunt?
225 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 10 in the latest 12 months.
What kinds of events are reported?
injury (74.7%), malfunction (19.6%) and death (5.8%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.
What device problems are coded?
insufficient device problem information (16%), device operates differently than expected (15.6%), complete blockage (6.7%), break (5.3%) and infusion or flow problem (5.3%). 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 Unknown Valve/Shunt 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.