510(k) · Cleared
Recalled · Class II · 2014Unipor Breathing Circuit Filter
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Pall Biomedical Products Co. · CAH Filter, Bacterial, Breathing-Circuit
Cleared on Aug 3, 1979 after an 18-day review. FDA has not posted a summary or statement for it, so its predicates are not known. 1 later device descends from it. It has been recalled once.
- Decided
- Aug 3, 1979
- Review
- 18 days
- Class
- Class II
- Product code
- CAH
- Recalls
- 1
- Predicates
- 0
1 later device descends from it, 1 citing it directly.
- This deviceK791307 Unipor Breathing Circuit FilterPall Biomedical Products Co. · 1979
- Descendant · cites it directly · 0 of its ownK032716 Portex Thermovent Hepa Hme Breathing Filter with CO2 Port (Sterile…Portex, Ltd. · 2003
Most influential descendants
Showing 1 of 1 · See all- K032716Portex Thermovent Hepa Hme Breathing Filter with CO2 Port (Sterile and Non-Sterile)Portex, Ltd. · 2003 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K791307 | Unipor Breathing Circuit Filter | Pall Biomedical Products Co. | 1979 | — |
| +1 | K032716 | Portex Thermovent Hepa Hme Breathing Filter with CO2 Port (Sterile and… | Portex, Ltd. | 2003 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2003 | 1 | 0 |
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 CAH? 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 CAH device
- #1 K251583 Ambu® Virobac II® Exhalation Filterscore 11.6 · 2 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin 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? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K032716 | Portex Thermovent Hepa Hme Breathing Filter with CO2 Port (Sterile and Non-Sterile) | 2003 | 0 |
Has anything in its family been recalled? (0 Class I)
Recalls of this device
| Date | Class | Recall | Root cause | Reason |
|---|---|---|---|---|
| Jun 4, 2014 | Class II | Z-2038-2014 | Other | Possible leak from the filter allowing a small of amount of air to be released from the junction between the filter end cap (flat side of the filter) and the filter housing connection. |
No ancestor or descendant has a Class I recall.
What does this lineage say?
- Of its descendants, K032716 (Portex, Ltd., 2003) has gone furthest, with 0 descendants of its own.
How does its category compare?
All CAH devicesCAH Filter, Bacterial, Breathing-Circuit: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · CAH
2in 2024
2026 to Oct 25, outlined.
Median 510(k) review, days · CAH
237in 2023
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · CAH
1in 2025
Class I (7 since 2007) Class II/III not classified
Adverse event reports per year · CAH
77in 2025
MAUDE reports naming product code CAH, 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 | 32 |
| 2008 | 1 | — | 0 | 27 |
| 2009 | 4 | 111 | 0 | 18 |
| 2010 | 5 | 216 | 2 | 40 |
| 2011 | 3 | 281 | 0 | 9 |
| 2012 | 3 | 212 | 0 | 16 |
| 2013 | 1 | — | 1 | 47 |
| 2014 | 4 | 250 | 1 | 98 |
| 2015 | 2 | — | 0 | 51 |
| 2016 | 0 | — | 0 | 34 |
| 2017 | 1 | — | 1 | 29 |
| 2018 | 0 | — | 0 | 33 |
| 2019 | 2 | — | 0 | 30 |
| 2020 | 2 | — | 0 | 33 |
| 2021 | 2 | — | 0 | 56 |
| 2022 | 3 | 204 | 6 (6) | 67 |
| 2023 | 3 | 237 | 0 | 40 |
| 2024 | 2 | — | 0 | 51 |
| 2025 | 0 | — | 1 (1) | 77 |
| 2026 | 2 | — | 0 | — |
https://510kreport.com/device/K791307 · printed Nov 4, 2026
Cite this page
510(k) Report. “K791307: Unipor Breathing Circuit Filter.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K791307
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Record history
- FDA decision record loaded May 2, 2026
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026