# K133975: MSA100 Peak Flow Meter

- Pathway: 510(k) (Traditional)
- Applicant: Beijing M&B Electronic Instruments Co., Ltd.
- Decided: Oct 3, 2014 after 281 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.
4 later devices descend from it; 1 cites it directly.
0 of 5 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. The summary cites one number, which could not be confirmed as its predicate (listed below).

## Cited in the summary but kept off the family tree
- K040723: Microlife Electronic Peak Flow Monitor, with Pef and FEV1, Models PF-100 and PF-100-1 (with Software), Microlife Intellectual Property GmbH (2004). Not matched in our reading of the summary (scans can blur digits), so it is kept off the family tree

## Most influential descendants
- K170281: MSA100BT Peak Flow Meter (2017), 3 descendants of its own
- K191239: Smart Peak Flow Meter (2019), 1 descendant of its own
- K230423: Electronic Peak Flow Meter (2024), 0 descendants of its own
- K203196: Peak flow meter (2021), 0 descendants of its own

## Indications for use
This device is intended for monitoring PEF (Peak Expired Flow Rate) and FEV1 (Forced Expiratory Volume in one second) for patient home use. The device is designed for pediatric to adult patients. The device is intended for monitoring respiratory conditions such as asthma.

Source page: https://510kreport.com/device/K133975
Methodology: https://510kreport.com/methodology