# K934509: Pulmoguard Disposable Baterial/Viral Filter

- Pathway: 510(k) (Traditional)
- Applicant: Sdi Diagnostics, Inc.
- Decided: Oct 21, 1993 after 37 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 has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K062913: Astraguard Pulmonary Function Filter (2007), 0 descendants of its own
- K050424: Ergofilter Spi Accessory to Spirolyser SPL-50 (2005), 0 descendants of its own
- K980662: Lichen, Bacterial in Line Breathing Filter (1998), 0 descendants of its own

Source page: https://510kreport.com/device/K934509
Methodology: https://510kreport.com/methodology