510(k) · Cleared
Recalled · 2007Colloid Osmometer 4400
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Wescor, Inc. · JJM Osmometer For Clinical Use
Cleared on Mar 23, 1984 after a 109-day review. FDA has not posted a summary or statement for it, so its predicates are not known. It has been recalled 2 times.
- Decided
- Mar 23, 1984
- Review
- 109 days
- Class
- Class I
- Product code
- JJM
- Recalls
- 2
- Predicates
- 0
FDA has not posted a summary or statement for it, so its predicates are not known.
Sources: FDA 510(k) database (decision fields), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in JJM? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
- Candidate predicates for a device like this, rankedin the report
- Recall history across each candidate’s familyin the report
What was it cleared against?
FDA has not posted a summary or statement for it, so its predicates are not known.
What descends from it?
No later submission names this one as a predicate yet.
Has anything in its family been recalled? (0 Class I)
Recalls of this device
| Date | Class | Recall | Root cause | Reason |
|---|---|---|---|---|
| Dec 26, 2007 | Not classified | Z-1351-2008 | Nonconforming Material/Component | Inaccurate readings; The control does not provide an accurate calibration value/readings when performing Colloid Osmotic Pressure (COP) testing. |
| Dec 26, 2007 | Not classified | Z-1350-2008 | Nonconforming Material/Component | Inaccurate readings; The control does not provide an accurate calibration value/readings when performing Colloid Osmotic Pressure (COP) testing. |
No ancestor or descendant has a Class I recall.
How does its category compare?
All JJM devicesJJM Osmometer For Clinical Use: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · JJM
FDA has decided no JJM device since 2007.
Median 510(k) review, days · JJM
Too few JJM 510(k)s in any year since 2007 to give a median.
Recalls per year · JJM
2in 2007
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · JJM
No MAUDE report names JJM since 2007.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 0 | — | 2 | 0 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 0 | — | 0 | 0 |
| 2010 | 0 | — | 0 | 0 |
| 2011 | 0 | — | 0 | 0 |
| 2012 | 0 | — | 0 | 0 |
| 2013 | 0 | — | 0 | 0 |
| 2014 | 0 | — | 0 | 0 |
| 2015 | 0 | — | 0 | 0 |
| 2016 | 0 | — | 0 | 0 |
| 2017 | 0 | — | 0 | 0 |
| 2018 | 0 | — | 0 | 0 |
| 2019 | 0 | — | 0 | 0 |
| 2020 | 0 | — | 0 | 0 |
| 2021 | 0 | — | 0 | 0 |
| 2022 | 0 | — | 0 | 0 |
| 2023 | 0 | — | 0 | 0 |
| 2024 | 0 | — | 0 | 0 |
| 2025 | 0 | — | 0 | 0 |
| 2026 | 0 | — | 0 | — |
https://510kreport.com/device/K834208 · printed Nov 5, 2026
Cite this page
510(k) Report. “K834208: Colloid Osmometer 4400.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 5, 2026. https://510kreport.com/device/K834208
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Record history
- FDA decision record loaded May 2, 2026
- Page last updated Nov 3, 2026