510(k) · Cleared
ClearedBest Radiopaque Strand; Best Radiopaque Marker
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Best Medical International, Inc. · KXK Source, Brachytherapy, Radionuclide
Cleared on Dec 9, 2004 after a 29-day review. The FDA summary names no predicate by number. 5 later devices descend from it.
- Decided
- Dec 9, 2004
- Review
- 29 days
- Class
- Class II
- Product code
- KXK
- Recalls
- None
- Predicates
- 0
5 later devices descend from it, 1 citing it directly.
- This deviceK043117 Best Radiopaque Strand; Best Radiopaque MarkerBest Medical International, Inc. · 2004
- Descendant · cites it directly · 4 of its ownK071550 Pre-Waxed Needles with Gold Fiduciary MarkersCp Medical · 2007
- Descendant · 2 generations on · 3 of its ownK103449 Brachytherapy Needles, RP Sleeve, RP Brachy-Spacer, Gold MakersRiverpoint Medical · 2011
- Descendant · 3 generations on · 1 of its ownK131689 Mri MarkerC4 Imaging, LLC · 2013
- Descendant · 4 generations on · 0 of its ownK171487 Sirius MRI Marker NSC4 Imaging, LLC · 2017
- Descendant · 3 generations on · 0 of its ownK120859 Pre-Loaded Gold Visicoil CK MarkerRadiomed Corporation · 2012
Most influential descendants
Showing 5 of 5 · See all- K071550Pre-Waxed Needles with Gold Fiduciary MarkersCp Medical · 2007 · cites it directly4descendants
- K103449Brachytherapy Needles, RP Sleeve, RP Brachy-Spacer, Gold MakersRiverpoint Medical · 2011 · 2 generations on3descendants
- K131689Mri MarkerC4 Imaging, LLC · 2013 · 3 generations on1descendant
- K171487Sirius MRI Marker NSC4 Imaging, LLC · 2017 · 4 generations on0descendants
- K120859Pre-Loaded Gold Visicoil CK MarkerRadiomed Corporation · 2012 · 3 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K043117 | Best Radiopaque Strand; Best Radiopaque Marker | Best Medical International, Inc. | 2004 | — |
| +1 | K071550 | Pre-Waxed Needles with Gold Fiduciary Markers | Cp Medical | 2007 | — |
| +2 | K103449 | Brachytherapy Needles, RP Sleeve, RP Brachy-Spacer, Gold Makers | Riverpoint Medical | 2011 | — |
| +3 | K131689 | Mri Marker | C4 Imaging, LLC | 2013 | — |
| +4 | K171487 | Sirius MRI Marker NS | C4 Imaging, LLC | 2017 | — |
| +3 | K120859 | Pre-Loaded Gold Visicoil CK Marker | Radiomed Corporation | 2012 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2007 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2017 | 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 KXK? 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 KXK device
- #1 K242818 IsoSpherescore 10.9 · 5 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against?
The FDA summary names no predicate by number.
What descends from it? (5)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K071550 | Pre-Waxed Needles with Gold Fiduciary Markers | 2007 | 4 |
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?
- Of its descendants, K071550 (Cp Medical, 2007) has gone furthest, with 4 descendants of its own.
How does its category compare?
All KXK devicesKXK Source, Brachytherapy, Radionuclide: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · KXK
2in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KXK
158in 2020
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KXK
1in 2016
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · KXK
7in 2025
MAUDE reports naming product code KXK, 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 | 5 | 42 | 0 | 9 |
| 2008 | 1 | — | 1 | 15 |
| 2009 | 7 | 63 | 0 | 10 |
| 2010 | 1 | — | 0 | 0 |
| 2011 | 5 | 94 | 1 | 35 |
| 2012 | 3 | 109 | 1 | 4 |
| 2013 | 3 | 127 | 0 | 29 |
| 2014 | 8 | 96 | 0 | 13 |
| 2015 | 2 | — | 0 | 6 |
| 2016 | 4 | 49 | 1 | 40 |
| 2017 | 2 | — | 0 | 41 |
| 2018 | 1 | — | 0 | 28 |
| 2019 | 2 | — | 0 | 10 |
| 2020 | 3 | 158 | 0 | 15 |
| 2021 | 0 | — | 0 | 62 |
| 2022 | 1 | — | 0 | 26 |
| 2023 | 1 | — | 0 | 9 |
| 2024 | 0 | — | 0 | 15 |
| 2025 | 2 | — | 0 | 7 |
| 2026 | 0 | — | 0 | — |
What is it indicated for?
The Best Radiopaque Strand (Marker Strand) is made of radiopaque xxx a markers (i.e,
seeds) and absorbable spacers, inside an absorbable strand, is indicated for use in
brachytherapy, soft tissues, or organ tissue, but should not be used during cardiovascular
or neurological procedures.
The Best Radiopaque Marker (Marker) is made of a radiopaque xxx solid seed, is
indicated for use in brachytherapy, soft tissues, or organ tissue, but should not be used
during cardiovascular or neurological procedures.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K043117 · printed Nov 6, 2026
Cite this page
510(k) Report. “K043117: Best Radiopaque Strand; Best Radiopaque Marker.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K043117
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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