510(k) · Cleared
ClearedTRIO 300
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Ito Co., Ltd. · IPF Stimulator, Muscle, Powered
Cleared on Oct 20, 1999 as substantially equivalent to K981976 (Microcurrent Research, Inc., 1998) and 1 other predicate after a 224-day review. Its family tree reaches back 2 generations to 1991. 78 later devices descend from it.
- Decided
- Oct 20, 1999
- Review
- 224 days
- Class
- Class II
- Product code
- IPF
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 2 generations to K912178 (1991). 6 ancestors in all, the oldest K880042 (1988). 78 later devices descend from it, 3 citing it directly.
- Root · 2 generations backK912178 Bio Tens 601, 606 and 608 (3000)Skylark Device Co., Ltd. · 1991
- 1 generation backK972244 NT2000Bio-Medical Research, Ltd. · 1998
- This deviceK990787 TRIO 300Ito Co., Ltd. · 1999
- Descendant · cites it directly · 63 of its ownK023231 Elfcare Device, Models 314A Through 314GMediseb, Ltd. · 2003
- Descendant · 2 generations on · 35 of its ownK063715 Juniper Cooling Device XtraJuniper Medical, Inc. · 2007
- Descendant · 2 generations on · 34 of its ownK072152 Juniper CLN1 Dermal Cooling DeviceJuniper Medical, Inc. · 2007
- Descendant · 3 generations on · 33 of its ownK080118 Zeltiq Aesthetics CLN1 Dermal Cooling DeviceZeltiq Aesthetics · 2008
- Descendant · 4 generations on · 32 of its ownK090094 Zeltiq SystemZeltiq Aesthetics · 2009
Showing 5 of 78 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 78 · See all- K023231Elfcare Device, Models 314A Through 314GMediseb, Ltd. · 2003 · cites it directly63descendants
- K063715Juniper Cooling Device XtraJuniper Medical, Inc. · 2007 · 2 generations on35descendants
- K072152Juniper CLN1 Dermal Cooling DeviceJuniper Medical, Inc. · 2007 · 2 generations on34descendants
- K080118Zeltiq Aesthetics CLN1 Dermal Cooling DeviceZeltiq Aesthetics · 2008 · 3 generations on33descendants
- K090094Zeltiq SystemZeltiq Aesthetics · 2009 · 4 generations on32descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K912178 | Bio Tens 601, 606 and 608 (3000) | Skylark Device Co., Ltd. | 1991 | — |
| −1 | K972244 | NT2000 | Bio-Medical Research, Ltd. | 1998 | — |
| 0 (this device) | K990787 | TRIO 300 | Ito Co., Ltd. | 1999 | — |
| +1 | K023231 | Elfcare Device, Models 314A Through 314G | Mediseb, Ltd. | 2003 | — |
| +2 | K063715 | Juniper Cooling Device Xtra | Juniper Medical, Inc. | 2007 | — |
| +2 | K072152 | Juniper CLN1 Dermal Cooling Device | Juniper Medical, Inc. | 2007 | — |
| +3 | K080118 | Zeltiq Aesthetics CLN1 Dermal Cooling Device | Zeltiq Aesthetics | 2008 | — |
| +4 | K090094 | Zeltiq System | Zeltiq Aesthetics | 2009 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1988 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1998 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2005 | 1 | 0 |
| 2007 | 3 | 0 |
| 2008 | 1 | 0 |
| 2009 | 2 | 0 |
| 2012 | 2 | 0 |
| 2013 | 1 | 0 |
| 2014 | 2 | 0 |
| 2015 | 7 | 0 |
| 2016 | 4 | 0 |
| 2017 | 5 | 0 |
| 2018 | 2 | 0 |
| 2019 | 9 | 0 |
| 2020 | 6 | 0 |
| 2021 | 7 | 0 |
| 2022 | 8 | 0 |
| 2023 | 9 | 0 |
| 2024 | 4 | 0 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in IPF? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new IPF device
- #1 K241433 EVE Synergy (EVE-20M)score 19.6 · 25 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (2)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K981976 | Acutron Mentor Model 961Summary page 1…current, and programmable modes of the Trio 300 Multi-Mode Electrical Stimulator are substantially equivalent to the corresponding modes of the Acutron Mentor Model 961 (K981976). The electrical muscle stimulation (EMS), TENS, and programmable modes of the Trio 300 Multi-Mode Electrical Stimulator are subs… | 1998 |
| * | K972244 | NT2000Summary page 1…on (EMS), TENS, and programmable modes of the Trio 300 Multi-Mode Electrical Stimulator are substantially equivalent to the Bio-Medical Research Model NT2000 Stimulator (K972244). B. DEVICE DESCRIPTION The Trio 300 Multi-Mode Electrical Stimulator is a small, portable, battery-powered electrical stimulat… | 1998 |
What descends from it? (78)
See all 783 later devices cite it directly; ranked here by how many devices descend from each in turn.
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 8 years and passes through 3 companies; a new generation was cleared every 6.3 years on median.
- None of the 6 ancestors has a recall.
- Of its descendants, K023231 (Mediseb, Ltd., 2003) has gone furthest, with 63 descendants of its own.
How does its category compare?
All IPF devicesIPF Stimulator, Muscle, Powered: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · IPF
3in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · IPF
257in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · IPF
1in 2023
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · IPF
8in 2025
MAUDE reports naming product code IPF, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 8 | 143 | 0 | 11 |
| 2008 | 6 | 140 | 1 | 213 |
| 2009 | 7 | 216 | 0 | 150 |
| 2010 | 4 | 121 | 0 | 14 |
| 2011 | 4 | 275 | 1 | 25 |
| 2012 | 4 | 269 | 3 | 16 |
| 2013 | 10 | 180 | 0 | 6 |
| 2014 | 4 | 264 | 0 | 19 |
| 2015 | 3 | 43 | 0 | 11 |
| 2016 | 7 | 113 | 0 | 8 |
| 2017 | 5 | 110 | 0 | 2 |
| 2018 | 5 | 73 | 0 | 3 |
| 2019 | 4 | 133 | 0 | 10 |
| 2020 | 9 | 121 | 0 | 13 |
| 2021 | 15 | 98 | 0 | 3 |
| 2022 | 7 | 108 | 0 | 4 |
| 2023 | 9 | 255 | 1 | 8 |
| 2024 | 7 | 201 | 0 | 5 |
| 2025 | 3 | 257 | 0 | 8 |
| 2026 | 3 | 206 | 0 | — |
What is it indicated for?
The TENS and Microcurrent modes of the Trio 300 are indicated for the symptomatic relief of chronic intractable pain. They are also indicated for the treatment of post-traumatic and post-surgical pain. The electrical muscle stimulation (EMS) mode is indicated for relaxation of muscle spasm, prevention or retardation of disuse muscle atrophy, muscle re-education, increase local blood circulation, maintain or increase range of motion, immediate post-surgical stimulation of calf muscles to prevent venous thrombosis.
Indications for use read by OCR from a scanned FDA summary, so letters may be misread. Check the PDF before quoting it.
https://510kreport.com/device/K990787 · printed Nov 6, 2026
Cite this page
510(k) Report. “K990787: TRIO 300.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K990787
Report an extraction error
Are you the manufacturer?
Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026