510(k) · Cleared
ClearedMicroselectron PDR
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Nucletron Corp. · JAQ System, Applicator, Radionuclide, Remote-Controlled
Cleared on Aug 18, 2004 as substantially equivalent to K953946 (Nucletron-Oldelft Corp., 1996) after a 30-day review. Its family tree reaches back 2 generations to 1986. 8 later devices descend from it.
- Decided
- Aug 18, 2004
- Review
- 30 days
- Class
- Class II
- Product code
- JAQ
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 2 generations to K864210 (1986). 3 ancestors in all. 8 later devices descend from it, 1 citing it directly.
- Root · 2 generations backK864210 Microselectron-HDR (High Dose Rate)Nucletron-Oldelft Corp. · 1986
- 1 generation backK953946 Microselectron-HDR Version 2Nucletron-Oldelft Corp. · 1996
- This deviceK041933 Microselectron PDRNucletron Corp. · 2004
- Descendant · cites it directly · 7 of its ownK061354 Microselectron V3, Model 106.990Nucletron Corporation · 2006
- Descendant · 2 generations on · 4 of its ownK120993 Gammamedplus IX Brachytherapy Afterloader, Gammamedplus 3/24 IX…Varian Medical Systems, Inc. · 2012
- Descendant · 3 generations on · 2 of its ownK181903 BRAVOS Afterloader Family: BRAVOS Afterloader System, Transfer Guide…Varian Medical Systems, Inc. · 2018
- Descendant · 4 generations on · 1 of its ownK191580 BRAVOS Afterloader System, Transfer Guide Tubes, Length Assessment…Varian Medical Systems, Inc. · 2019
- Descendant · 2 generations on · 1 of its ownK092804 Microselectron HDR V2, Model 105.999Nucletron Corp. · 2009
Showing 5 of 8 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 8 · See all- K061354Microselectron V3, Model 106.990Nucletron Corporation · 2006 · cites it directly7descendants
- K120993Gammamedplus IX Brachytherapy Afterloader, Gammamedplus 3/24 IX Brachytherapy AfterloaderVarian Medical Systems, Inc. · 2012 · 2 generations on4descendants
- K181903BRAVOS Afterloader Family: BRAVOS Afterloader System, Transfer Guide Tubes, and Length…Varian Medical Systems, Inc. · 2018 · 3 generations on2descendants
- K191580BRAVOS Afterloader System, Transfer Guide Tubes, Length Assessment DeviceVarian Medical Systems, Inc. · 2019 · 4 generations on1descendant
- K092804Microselectron HDR V2, Model 105.999Nucletron Corp. · 2009 · 2 generations on1descendant
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K864210 | Microselectron-HDR (High Dose Rate) | Nucletron-Oldelft Corp. | 1986 | — |
| −1 | K953946 | Microselectron-HDR Version 2 | Nucletron-Oldelft Corp. | 1996 | — |
| 0 (this device) | K041933 | Microselectron PDR | Nucletron Corp. | 2004 | — |
| +1 | K061354 | Microselectron V3, Model 106.990 | Nucletron Corporation | 2006 | — |
| +2 | K120993 | Gammamedplus IX Brachytherapy Afterloader, Gammamedplus 3/24 IX Brachytherapy… | Varian Medical Systems, Inc. | 2012 | — |
| +3 | K181903 | BRAVOS Afterloader Family: BRAVOS Afterloader System, Transfer Guide Tubes… | Varian Medical Systems, Inc. | 2018 | — |
| +4 | K191580 | BRAVOS Afterloader System, Transfer Guide Tubes, Length Assessment Device | Varian Medical Systems, Inc. | 2019 | — |
| +2 | K092804 | Microselectron HDR V2, Model 105.999 | Nucletron Corp. | 2009 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1993 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2006 | 1 | 0 |
| 2009 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2015 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 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 JAQ? 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 JAQ device
- #1 K241853 Titanium Fletcher-Style Applicator Set Defined…score 14.9 · 3 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 |
|---|---|---|---|
| * | K953946 | Microselectron-HDR Version 2Summary page 2…The PC based Afterloader workstation comes functionality to support PDR procedures (i.e. Scheduling of treatments). The modifications to the previously cleared device K<953946 are: *Addition of RCU and NSD previously cleared device K<902533 *Addition of Radiation Status Indicator *Changes to TCS to… | 1996 |
What descends from it? (8)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K061354 | Microselectron V3, Model 106.990 | 2006 | 7 |
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 18 years and passes through 2 companies; a new generation was cleared every 9.7 years on median.
- None of the 3 ancestors has a recall.
- Of its descendants, K061354 (Nucletron Corporation, 2006) has gone furthest, with 7 descendants of its own.
- 27 other devices also cite its predicate K953946.
How does its category compare?
All JAQ devicesJAQ System, Applicator, Radionuclide, Remote-Controlled: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · JAQ
6in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · JAQ
91in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · JAQ
1in 2019
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · JAQ
3in 2025
MAUDE reports naming product code JAQ, 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 | 11 | 48 | 0 | 13 |
| 2008 | 10 | 34 | 5 | 32 |
| 2009 | 10 | 27 | 1 | 35 |
| 2010 | 2 | — | 2 | 36 |
| 2011 | 2 | — | 13 | 42 |
| 2012 | 7 | 89 | 5 | 34 |
| 2013 | 6 | 100 | 1 | 43 |
| 2014 | 7 | 116 | 0 | 18 |
| 2015 | 11 | 183 | 0 | 7 |
| 2016 | 6 | 154 | 0 | 3 |
| 2017 | 7 | 229 | 0 | 5 |
| 2018 | 7 | 252 | 0 | 2 |
| 2019 | 2 | — | 1 | 8 |
| 2020 | 4 | 62 | 0 | 8 |
| 2021 | 0 | — | 0 | 5 |
| 2022 | 1 | — | 0 | 5 |
| 2023 | 2 | — | 0 | 3 |
| 2024 | 10 | 126 | 0 | 1 |
| 2025 | 6 | 91 | 0 | 3 |
| 2026 | 2 | — | 3 | — |
What is it indicated for?
The MicroSelectron PDR is intended to enable an operator to apply, by remote control, a radionuclide source into the body (including Interstitial, Intracavitary, Intraluminal, Bronchial, Endovascular and Intra-operative) or to the surface of the body for radiation therapy.
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/K041933 · printed Nov 4, 2026
Cite this page
510(k) Report. “K041933: Microselectron PDR.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K041933
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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