# K964979: Porous Media DBF23 Disposable Respiratory Filter

- Pathway: 510(k) (Traditional)
- Applicant: Porous Media Corp.
- Decided: Mar 11, 1997 after 89 days
- Product code: CAH (Filter, Bacterial, Breathing-Circuit)
- Device class: 2
- Regulation: 21 CFR 868.5260
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
3 later devices descend from it; 3 cite it directly.
0 of 4 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA lists a 510(k) statement for it but has not posted the file, so its predicates are not known.

## Most influential descendants
- K032716: Portex Thermovent Hepa Hme Breathing Filter with CO2 Port (Sterile and Non-Sterile) (2003), 0 descendants of its own
- K014281: Gard Filter, Combigard Filte / Hme (2002), 0 descendants of its own
- K982127: Porous Media DEF25 Disposable Respiratory Filter (1998), 0 descendants of its own

Source page: https://510kreport.com/device/K964979
Methodology: https://510kreport.com/methodology