510(k) · Cleared
ClearedPlateletworks, Models PW-a, PW-C
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Helena Laboratories · JOZ System, Automated Platelet Aggregation
Cleared on Feb 14, 2003 as substantially equivalent to K990398 (Array Medical, Inc., 1999) after a 98-day review. Its family tree reaches back 2 generations to 1977.
- Decided
- Feb 14, 2003
- Review
- 98 days
- Class
- Class II
- Product code
- JOZ
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 2 generations to K771198 (1977). 6 ancestors in all. No later device cites it as a predicate yet.
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K771198 | Lumi-Aggregometer | Chrono-Log Corp. | 1977 | — |
| −1 | K990398 | Plateletworks | Array Medical, Inc. | 1999 | — |
| 0 (this device) | K023761 | Plateletworks, Models PW-a, PW-C | Helena Laboratories | 2003 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1985 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA 510(k) statement (indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in JOZ? 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 JOZ device
- #1 K191364 T-TAS 01 Total Thrombus-formation Analysis…score -0.6 · 3 generations · no Class I recall
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 |
|---|---|---|---|
| * | K990398 | PlateletworksSummary page 3…ces and Radiological Health Enclosure Indications f o r Use: 510(k) Number (if known) : Device Name: P1ate1etworks8 Plateletworks ( K 9 9 0 3 9 8 ) is an in vitro diagnostic screening assay for the determination of % platelet aggregation in fresh whole blood. samples taken d… | 1999 |
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 26 years and passes through 3 companies; a new generation was cleared every 22.3 years on median.
- None of the 6 ancestors has a recall.
How does its category compare?
All JOZ devicesJOZ System, Automated Platelet Aggregation: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · JOZ
1in 2020
2026 to Oct 25, outlined.
Median 510(k) review, days · JOZ
Too few JOZ 510(k)s in any year since 2007 to give a median.
Recalls per year · JOZ
1in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · JOZ
3in 2025
MAUDE reports naming product code JOZ, 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 | 0 | — | 0 | 0 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 0 | — | 0 | 0 |
| 2010 | 0 | — | 0 | 1 |
| 2011 | 0 | — | 0 | 0 |
| 2012 | 1 | — | 0 | 1 |
| 2013 | 1 | — | 1 | 1 |
| 2014 | 0 | — | 0 | 1 |
| 2015 | 2 | — | 0 | 0 |
| 2016 | 1 | — | 0 | 0 |
| 2017 | 1 | — | 0 | 1 |
| 2018 | 0 | — | 0 | 25 |
| 2019 | 1 | — | 0 | 9 |
| 2020 | 1 | — | 0 | 2 |
| 2021 | 0 | — | 0 | 2 |
| 2022 | 0 | — | 0 | 16 |
| 2023 | 0 | — | 0 | 0 |
| 2024 | 0 | — | 1 | 1 |
| 2025 | 0 | — | 1 | 3 |
| 2026 | 0 | — | 0 | — |
What is it indicated for?
Plateletworks (K990398) is an in vitro diagnostic screening assay for the determination of % platelet aggregation in fresh whole blood samples taken during cardiac interventional procedures as measured by a change in platelet count due to activation of functional platelets. It may be used at the point-of-care on the Ichor or Coulter hematology analyzers as a screening tool for the detection of trends suggestive of platelet dysfunction. Any abnormal baseline or otherwise suspicious result would require repeating the Plateletworks test procedure and/or further additional investigation with more definitive test methods, including conventional platelet aggregometry.
Indications for use as stated in the FDA 510(k) statement.
https://510kreport.com/device/K023761 · printed Nov 6, 2026
Cite this page
510(k) Report. “K023761: Plateletworks, Models PW-a, PW-C.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K023761
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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