510(k) · Cleared
ClearedHeating Lumbar Therapy Cushion (Model: AST-622, AST-622B, AST-623, AST-623B)
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Shenzhen Osto Technology Company Limited · NGX Stimulator, Muscle, Powered, For Muscle Conditioning
Cleared on Dec 13, 2021 as substantially equivalent to K190783 (Shenzhen Osto Technology Company Limited, 2020) and 1 other predicate after a 173-day review. Its family tree reaches back 8 generations to 1994. 1 later device descends from it.
- Decided
- Dec 13, 2021
- Review
- 173 days
- Class
- Class II
- Product code
- NGX
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 8 generations to K940301 (1994). 35 ancestors in all, the oldest K880042 (1988). 1 later device descends from it, 1 citing it directly.
- Root · 8 generations backK940301 Compex 2Biodex Medical Systems, Inc. · 1994
- 7 generations backK011880 Compex SportCompex S.A. · 2002
- 6 generations backK060846 Therapeutic Massage CompanionEndurance Therapeutics · 2007
- 5 generations backK102598 HI-Dow-XPHi-Dow International, Inc. · 2011
- 4 generations backK121757 HealthmateforeverHealthmate International, LLC · 2012
- 3 generations backK141978 Maxpower ReliefOmron Healthcare, Inc. · 2014
- 2 generations backK160115 Heat Pain ProOmron Healthcare, Inc. · 2016
- 1 generation backK190783 Health Expert Electronic Stimulator (model: AST-300L)Shenzhen Osto Technology Company Limited · 2020
- This deviceK211942 Heating Lumbar Therapy Cushion (Model: AST-622, AST-622B, AST-623…Shenzhen Osto Technology Company Limited · 2021
- Descendant · cites it directly · 0 of its ownK223428 Electronic Stimulator (Models: uLumb-9530A, uLumb-9531A…Shenzhen Leqing Medical Instrument Co., Ltd. · 2023
Most influential descendants
Showing 1 of 1 · See all- K223428Electronic Stimulator (Models: uLumb-9530A, uLumb-9531A, uLumb-9532A, uLumb-9533A…Shenzhen Leqing Medical Instrument Co., Ltd. · 2023 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −8 | K940301 | Compex 2 | Biodex Medical Systems, Inc. | 1994 | — |
| −7 | K011880 | Compex Sport | Compex S.A. | 2002 | — |
| −6 | K060846 | Therapeutic Massage Companion | Endurance Therapeutics | 2007 | — |
| −5 | K102598 | HI-Dow-XP | Hi-Dow International, Inc. | 2011 | — |
| −4 | K121757 | Healthmateforever | Healthmate International, LLC | 2012 | — |
| −3 | K141978 | Maxpower Relief | Omron Healthcare, Inc. | 2014 | — |
| −2 | K160115 | Heat Pain Pro | Omron Healthcare, Inc. | 2016 | — |
| −1 | K190783 | Health Expert Electronic Stimulator (model: AST-300L) | Shenzhen Osto Technology Company Limited | 2020 | — |
| 0 (this device) | K211942 | Heating Lumbar Therapy Cushion (Model: AST-622, AST-622B, AST-623, AST-623B) | Shenzhen Osto Technology Company Limited | 2021 | — |
| +1 | K223428 | Electronic Stimulator (Models: uLumb-9530A, uLumb-9531A, uLumb-9532A… | Shenzhen Leqing Medical Instrument Co., Ltd. | 2023 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1988 | 1 | 0 |
| 1991 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 2 | 0 |
| 2005 | 2 | 0 |
| 2007 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 3 | 0 |
| 2014 | 3 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2020 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2023 | 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 NGX? 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 NGX device
- #1 K250146 SofWave Systemscore 15.5 · 12 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 |
|---|---|---|---|
| * | K190783 | Health Expert Electronic Stimulator (model: AST-300L)Summary page 4…tion Class: II 4. Predicate Device Information Predicate Device 1 Information Common Name: Transcutaneous electrical nerve stimulator for pain relief 510(k) Number: K190783 Sponsor: Shenzhen OSTO Technology Company Limited Trade Name: Health Expert Electronic Stimulator (model: AST-300L) Classif… | 2020 |
| * | K200561 | StimPlus Patch, StimPlus Patch, StimPlus PatchSummary page 5…ctrical Nerve Stimulation (TENS) unit, Powered Muscle Stimulation (PMS) unit, and heating for pain relief, blood circulation, and muscle performance 510(k) Number: K200561 Sponsor: JKH Health Co., LTD Trade Name: StimPlus Patch Classification Name: Stimulator, Nerve, Transcutaneous, Over-The-Co… | 2020 |
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 |
|---|---|---|---|
| K223428 | Electronic Stimulator (Models: uLumb-9530A, uLumb-9531A, uLumb-9532A, uLumb-9533A… | 2023 | 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 27 years and passes through 7 companies; a new generation was cleared every 3.4 years on median.
- None of the 35 ancestors has a recall.
- Of its descendants, K223428 (Shenzhen Leqing Medical Instrument Co., Ltd., 2023) has gone furthest, with 0 descendants of its own.
- 4 other devices also cite its predicate K190783.
How does its category compare?
All NGX devicesNGX Stimulator, Muscle, Powered, For Muscle Conditioning: FDA decisions, review times, recalls and adverse event reports over 20 years. 2021, this device’s year, is highlighted.
FDA decisions per year · NGX
15in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · NGX
93in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · NGX
2in 2013
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · NGX
15in 2025
MAUDE reports naming product code NGX, 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 | 7 | 135 | 0 | 0 |
| 2008 | 3 | 209 | 0 | 0 |
| 2009 | 4 | 132 | 0 | 0 |
| 2010 | 6 | 180 | 0 | 0 |
| 2011 | 5 | 291 | 0 | 1 |
| 2012 | 3 | 362 | 0 | 0 |
| 2013 | 6 | 269 | 2 | 1 |
| 2014 | 6 | 298 | 0 | 0 |
| 2015 | 9 | 184 | 0 | 7 |
| 2016 | 4 | 240 | 0 | 21 |
| 2017 | 10 | 108 | 0 | 2 |
| 2018 | 6 | 104 | 0 | 6 |
| 2019 | 14 | 167 | 0 | 4 |
| 2020 | 11 | 207 | 0 | 7 |
| 2021 | 12 | 256 | 0 | 5 |
| 2022 | 6 | 307 | 0 | 7 |
| 2023 | 12 | 96 | 0 | 8 |
| 2024 | 12 | 207 | 0 | 11 |
| 2025 | 15 | 93 | 0 | 15 |
| 2026 | 4 | 118 | 0 | — |
What is it indicated for?
PMS(1 ~ 2): It is intended to stimulate healthy muscles in order to improve and facilitate muscle performance.
TENS(3 ~ 5): To be used for temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back, arm and leg due to strain from exercise or normal household work activities by applying current to stimulate nerve.
Heating: The Heating Lumbar Therapy Cushion is intended for temporary relief of minor aches and pains.
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/K211942 · printed Nov 6, 2026
Cite this page
510(k) Report. “K211942: Heating Lumbar Therapy Cushion (Model: AST-622, AST-622B, AST-623, AST-623B).” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K211942
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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