510(k) · Cleared
ClearedDolphin Neurostim Otc
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Acumed Medical, Ltd. · NUH Stimulator, Nerve, Transcutaneous, Over-The-Counter
Cleared on Mar 4, 2015 as substantially equivalent to K130114 (Newmark, Inc., 2013) and 1 other predicate after a 447-day review. Its family tree reaches back 6 generations to 1991. 1 later device descends from it.
- Decided
- Mar 4, 2015
- Review
- 447 days
- Class
- Class II
- Product code
- NUH
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 6 generations to K912178 (1991). 15 ancestors in all, the oldest K880042 (1988). 1 later device descends from it, 1 citing it directly.
- Root · 6 generations backK912178 Bio Tens 601, 606 and 608 (3000)Skylark Device Co., Ltd. · 1991
- 5 generations backK972244 NT2000Bio-Medical Research, Ltd. · 1998
- 4 generations backK990787 TRIO 300Ito Co., Ltd. · 1999
- 3 generations backK013167 MODEL7500 Microcurrent Tens Device, MCT-F5, MCT-F50, MCT-F500Newcare Products, LLC · 2002
- 2 generations backK090042 Painmaster MCT PatchNewmark, Inc. · 2009
- 1 generation backK130114 Painmaster MCT PatchNewmark, Inc. · 2013
- This deviceK133789 Dolphin Neurostim OtcAcumed Medical, Ltd. · 2015
- Descendant · cites it directly · 0 of its ownK182671 Medi-Direct TENS PenJkh USA, LLC · 2019
Most influential descendants
Showing 1 of 1 · See all- K182671Medi-Direct TENS PenJkh USA, LLC · 2019 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −6 | K912178 | Bio Tens 601, 606 and 608 (3000) | Skylark Device Co., Ltd. | 1991 | — |
| −5 | K972244 | NT2000 | Bio-Medical Research, Ltd. | 1998 | — |
| −4 | K990787 | TRIO 300 | Ito Co., Ltd. | 1999 | — |
| −3 | K013167 | MODEL7500 Microcurrent Tens Device, MCT-F5, MCT-F50, MCT-F500 | Newcare Products, LLC | 2002 | — |
| −2 | K090042 | Painmaster MCT Patch | Newmark, Inc. | 2009 | — |
| −1 | K130114 | Painmaster MCT Patch | Newmark, Inc. | 2013 | — |
| 0 (this device) | K133789 | Dolphin Neurostim Otc | Acumed Medical, Ltd. | 2015 | — |
| +1 | K182671 | Medi-Direct TENS Pen | Jkh USA, LLC | 2019 | — |
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 |
| 2001 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 2 | 0 |
| 2006 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2019 | 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 NUH? 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 NUH device
- #1 K190783 Health Expert Electronic Stimulator (model…score 15.8 · 7 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 |
|---|---|---|---|
| * | K130114 | Painmaster MCT PatchSummary page 4…ological Therapeutic Devices Device Classification Class II Establishment registration No. new submission Predicate Device Painmaster MCT Patch K130114 and TENS Pro 900 K023726 Trademark Notice: All Trademarks used other than those of ACUMED Medica… | 2013 |
| * | K023726 | Tens Pro 900Summary page 4…Class II Establishment registration No. new submission Predicate Device Painmaster MCT Patch K130114 and TENS Pro 900 K023726 Trademark Notice: All Trademarks used other than those of ACUMED Medical are registered to their respective owners. Device Des… | 2003 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K182671 | Medi-Direct TENS Pen | 2019 | 0 |
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 24 years and passes through 6 companies; a new generation was cleared every 3.9 years on median.
- None of the 15 ancestors has a recall.
- Of its descendants, K182671 (Jkh USA, LLC, 2019) has gone furthest, with 0 descendants of its own.
- 3 other devices also cite its predicate K130114.
How does its category compare?
All NUH devicesNUH Stimulator, Nerve, Transcutaneous, Over-The-Counter: FDA decisions, review times, recalls and adverse event reports over 20 years. 2015, this device’s year, is highlighted.
FDA decisions per year · NUH
15in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · NUH
119in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · NUH
No recall names NUH since 2007.
Adverse event reports per year · NUH
7in 2025
MAUDE reports naming product code NUH, 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 | 4 | 161 | 0 | 0 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 1 | — | 0 | 0 |
| 2010 | 3 | 148 | 0 | 0 |
| 2011 | 6 | 231 | 0 | 0 |
| 2012 | 6 | 170 | 0 | 0 |
| 2013 | 10 | 189 | 0 | 1 |
| 2014 | 16 | 212 | 0 | 9 |
| 2015 | 14 | 198 | 0 | 11 |
| 2016 | 13 | 145 | 0 | 13 |
| 2017 | 17 | 155 | 0 | 21 |
| 2018 | 16 | 121 | 0 | 18 |
| 2019 | 19 | 213 | 0 | 5 |
| 2020 | 14 | 147 | 0 | 8 |
| 2021 | 14 | 198 | 0 | 7 |
| 2022 | 20 | 103 | 0 | 2 |
| 2023 | 15 | 127 | 0 | 4 |
| 2024 | 20 | 90 | 0 | 7 |
| 2025 | 15 | 119 | 0 | 7 |
| 2026 | 5 | 137 | 0 | — |
What is it indicated for?
The Dolphin Neurostim™ OT C is indicated for temporary relief of pain associated with sore and aching muscles in the back, arms, and legs due to strain from exercise or normal household and work activities.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K133789 · printed Nov 4, 2026
Cite this page
510(k) Report. “K133789: Dolphin Neurostim Otc.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K133789
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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