510(k) · Cleared
ClearedRS-4I Muscle Stimulator
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Rs Medical · IPF Stimulator, Muscle, Powered
Cleared on Jan 19, 2012 as substantially equivalent to K032652 (Rs Medical, 2003) after a 156-day review. Its family tree reaches back 2 generations to 2000. 1 later device descends from it.
- Decided
- Jan 19, 2012
- Review
- 156 days
- Class
- Class II
- Product code
- IPF
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 2 generations to K000114 (2000). 1 later device descends from it, 1 citing it directly.
Most influential descendants
Showing 1 of 1 · See all- K221958Flex-MIEmsi, Inc. · 2022 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K000114 | RS-4M+Muscle Stimulator | Rs Medical | 2000 | — |
| −1 | K032652 | RS-4I Muscle Stimulator Family | Rs Medical | 2003 | 1 |
| 0 (this device) | K112348 | RS-4I Muscle Stimulator | Rs Medical | 2012 | — |
| +1 | K221958 | Flex-MI | Emsi, Inc. | 2022 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2022 | 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? (1)
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 |
|---|---|---|---|
| * | K032652 | RS-4I Muscle Stimulator FamilySummary page 1…l stimulation of calf muscles to prevent venous thrombosis Substantial equivalence: The RS-4i Plus is substantially equivalent to the RS-4i Muscle Stimulator Family (K032652). Both devices have the same intended use/indications for use and the same fundamental scientific technology. Description… | 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 |
|---|---|---|---|
| K221958 | Flex-MI | 2022 | 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 12 years and passes through 1 company; a new generation was cleared every 8.4 years on median.
- 1 of the 2 ancestors has a recall of any class.
- Of its descendants, K221958 (Emsi, Inc., 2022) has gone furthest, with 0 descendants of its own.
- 2 other devices also cite its predicate K032652.
How does its category compare?
All IPF devicesIPF Stimulator, Muscle, Powered: FDA decisions, review times, recalls and adverse event reports over 20 years. 2012, this device’s year, is highlighted.
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?
Interferential Stimulation Indications:
Relieve acute pain
Relieve and manage chronic pain
Muscle Stimulation Indications:
Relax muscle spasm
Prevention or retardation of disuse atrophy
Maintain or increase range of motion
Increase local blood circulation
Re-educate muscle
Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K112348 · printed Nov 6, 2026
Cite this page
510(k) Report. “K112348: RS-4I Muscle Stimulator.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K112348
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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