# K781922: Pulmonary Monitor

- Pathway: 510(k) (Traditional)
- Applicant: Vitalograph, Ltd.
- Decided: Feb 13, 1979 after 92 days
- Product code: BZH (Meter, Peak Flow, Spirometry)
- Device class: 2
- Regulation: 21 CFR 868.1860
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
5 later devices descend from it; 3 cite it directly.
0 of 6 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
- K030586: Micropeak (2003), 3 descendants of its own
- K172804: Besmed Peak Flow Meter (2018), 0 descendants of its own
- K101380: Rxpeakflow (2010), 0 descendants of its own
- K091412: Clean Peak Flow Meter (2009), 0 descendants of its own
- K082899: Dynamipeak Peak Flow Meter (2009), 0 descendants of its own

Source page: https://510kreport.com/device/K781922
Methodology: https://510kreport.com/methodology