510(k) · Cleared
ClearedUniPearls® Embolic Microspheres
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Suzhou Haowei Medical Technology Co., Ltd. · KRD Device, Vascular, For Promoting Embolization
Cleared on Nov 14, 2023 as substantially equivalent to K172372 (Biosphere Medical, S.A., 2017) after a 168-day review. Its family tree reaches back 2 generations to 2015. 1 later device descends from it.
- Decided
- Nov 14, 2023
- Review
- 168 days
- Class
- Class II
- Product code
- KRD
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 2 generations to K153102 (2015). 1 later device descends from it, 1 citing it directly.
- Root · 2 generations backK153102 QuadraSphere MicrospheresBiosphere Medical, S.A. · 2015
- 1 generation backK172372 QuadraSphere MicrospheresBiosphere Medical, S.A. · 2017
- This deviceK231554 UniPearls® Embolic MicrospheresSuzhou Haowei Medical Technology Co., Ltd. · 2023
- Descendant · cites it directly · 0 of its ownK252812 UniPearls® Embolic MicrospheresSuzhou Haowei Medical Technology Co., Ltd. · 2026
Most influential descendants
Showing 1 of 1 · See all- K252812UniPearls® Embolic MicrospheresSuzhou Haowei Medical Technology Co., Ltd. · 2026 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K153102 | QuadraSphere Microspheres | Biosphere Medical, S.A. | 2015 | — |
| −1 | K172372 | QuadraSphere Microspheres | Biosphere Medical, S.A. | 2017 | — |
| 0 (this device) | K231554 | UniPearls® Embolic Microspheres | Suzhou Haowei Medical Technology Co., Ltd. | 2023 | — |
| +1 | K252812 | UniPearls® Embolic Microspheres | Suzhou Haowei Medical Technology Co., Ltd. | 2026 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2026 | 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 KRD? 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 KRD device
- #1 K253511 Concerto Versa™ Detachable Coilscore 17.6 · 14 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 |
|---|---|---|---|
| * | K172372 | QuadraSphere MicrospheresSummary page 5…mbolization 870.3300 KRD I Legally Marketed Predicate Devices Predicate # 21 CFR 807.92(a)(3) Predicate Trade Name (Primary Predicate is listed first) Product Code K172372 QuadraSphere Microspheres KRD Device Description Summary 21 CFR 807.92(a)(4) UniPearls® Embolic Microspheres consist of non-bio… | 2017 |
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 |
|---|---|---|---|
| K252812 | UniPearls® Embolic Microspheres | 2026 | 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 8 years and passes through 2 companies; a new generation was cleared every 6.2 years on median.
- None of the 2 ancestors has a recall.
- Of its descendants, K252812 (Suzhou Haowei Medical Technology Co., Ltd., 2026) has gone furthest, with 0 descendants of its own.
How does its category compare?
All KRD devicesKRD Device, Vascular, For Promoting Embolization: FDA decisions, review times, recalls and adverse event reports over 20 years. 2023, this device’s year, is highlighted.
FDA decisions per year · KRD
9in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KRD
60in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KRD
1in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · KRD
1,572in 2025
MAUDE reports naming product code KRD, 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 | 2 | — | 0 | 21 |
| 2008 | 5 | 84 | 0 | 14 |
| 2009 | 4 | 27 | 0 | 40 |
| 2010 | 3 | 150 | 1 | 61 |
| 2011 | 5 | 36 | 0 | 102 |
| 2012 | 8 | 30 | 0 | 137 |
| 2013 | 11 | 33 | 1 | 244 |
| 2014 | 7 | 134 | 0 | 159 |
| 2015 | 11 | 130 | 0 | 337 |
| 2016 | 4 | 164 | 0 | 437 |
| 2017 | 4 | 89 | 0 | 736 |
| 2018 | 4 | 62 | 0 | 1,066 |
| 2019 | 6 | 178 | 0 | 1,185 |
| 2020 | 4 | 137 | 0 | 1,167 |
| 2021 | 3 | 134 | 0 | 1,444 |
| 2022 | 8 | 175 | 0 | 1,498 |
| 2023 | 2 | — | 1 | 1,371 |
| 2024 | 6 | 70 | 1 | 1,535 |
| 2025 | 9 | 60 | 0 | 1,572 |
| 2026 | 7 | 70 | 1 | — |
What is it indicated for?
UniPearls® Embolic Microspheres are indicated for embolization of hypervascularized tumors including hepatoma, and peripheral arteriovenous malformations.
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/K231554 · printed Nov 6, 2026
Cite this page
510(k) Report. “K231554: UniPearls® Embolic Microspheres.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K231554
Report an extraction error
Are you the manufacturer?
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