510(k) · Cleared
ClearedSDX System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Dyn'R Sas · IYE Accelerator, Linear, Medical
Cleared on Oct 19, 2012 as substantially equivalent to K102024 (Varian Medical Systems, 2010) and 1 other predicate after a 116-day review. Its family tree reaches back 4 generations to 1987.
- Decided
- Oct 19, 2012
- Review
- 116 days
- Class
- Class II
- Product code
- IYE
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 4 generations to K864886 (1987). 6 ancestors in all. No later device cites it as a predicate yet.
- Root · 4 generations backK864886 Respigraph-Respisomnograph-RespicentralNims/Respitrace Corp. · 1987
- 3 generations backK983629 RPM Respiratory Gating SystemVarian Medical Systems, Inc. · 1999
- 2 generations backK063270 RPM Respiratory Gating SystemVarian Medical Systems, Inc. · 2006 · Recalled
- 1 generation backK102024 RPM Respiratory Gating SystemVarian Medical Systems · 2010 · Recalled
- This deviceK121845 SDX SystemDyn'R Sas · 2012
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −4 | K864886 | Respigraph-Respisomnograph-Respicentral | Nims/Respitrace Corp. | 1987 | — |
| −3 | K983629 | RPM Respiratory Gating System | Varian Medical Systems, Inc. | 1999 | — |
| −2 | K063270 | RPM Respiratory Gating System | Varian Medical Systems, Inc. | 2006 | 1 |
| −1 | K102024 | RPM Respiratory Gating System | Varian Medical Systems | 2010 | 1 |
| 0 (this device) | K121845 | SDX System | Dyn'R Sas | 2012 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2001 | 1 | 0 |
| 2010 | 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 IYE? 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 IYE device
- #1 K252977 Halcyon, Ethos Radiotherapy System (5.0)score 18.8 · 18 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 |
|---|---|---|---|
| * | K102024 | RPM Respiratory Gating SystemSummary page 1…pect to the Gating aspects only (Table 1) 0 Dyn'R SAS - SDX Module without the Automatic Gating Module (Table 2) TABLE 1 Predicate device (K102024) New Device SOX System… | 2010 |
| * | K092479 | SDX-Spirodynr'x Radiotherapy Breathing ControlSummary page 3…Section 5-2 TABLE 2 Predicate device (K092479) New Device SDX System Device… | 2010 |
What descends from it?
No later submission names this one as a predicate yet.
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 25 years and passes through 4 companies; a new generation was cleared every 7.5 years on median.
- 2 of the 6 ancestors have a recall of any class.
- 2 other devices also cite its predicate K102024.
How does its category compare?
All IYE devicesIYE Accelerator, Linear, Medical: FDA decisions, review times, recalls and adverse event reports over 20 years. 2012, this device’s year, is highlighted.
FDA decisions per year · IYE
12in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · IYE
170in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · IYE
1in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · IYE
101in 2025
MAUDE reports naming product code IYE, 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 | 23 | 44 | 78 | 155 |
| 2008 | 14 | 69 | 49 | 114 |
| 2009 | 20 | 63 | 22 | 174 |
| 2010 | 23 | 74 | 27 | 246 |
| 2011 | 11 | 94 | 73 | 280 |
| 2012 | 28 | 106 | 20 | 128 |
| 2013 | 18 | 88 | 11 | 96 |
| 2014 | 20 | 100 | 14 | 124 |
| 2015 | 20 | 108 | 8 | 100 |
| 2016 | 21 | 97 | 7 | 97 |
| 2017 | 23 | 94 | 7 | 125 |
| 2018 | 21 | 58 | 7 | 85 |
| 2019 | 19 | 83 | 2 | 91 |
| 2020 | 20 | 67 | 4 | 74 |
| 2021 | 19 | 86 | 5 | 68 |
| 2022 | 12 | 172 | 3 | 66 |
| 2023 | 18 | 129 | 7 | 128 |
| 2024 | 9 | 239 | 1 | 81 |
| 2025 | 12 | 170 | 1 | 101 |
| 2026 | 14 | 120 | 4 | — |
What is it indicated for?
SDX is intended for use in Radiation therapy as an aid in allowing the patient and treatment staff to visualize a patients breathing process and to optimize breathing to limit internal motion during imaging & treatment.
The SDX System including the Automatic Gating Module is used to provide respiratory synchronization for radiation therapy imaging & treatment.
The SDX System may be used for pediatric, adolescents & adult patients above the age of 5 years capable of understanding and following the radiotherapists instructions.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K121845 · printed Nov 6, 2026
Cite this page
510(k) Report. “K121845: SDX System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K121845
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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