# K170281: MSA100BT Peak Flow Meter

- Pathway: 510(k) (Traditional)
- Applicant: Beijing M&B Electronic Instruments Co., Ltd.
- Decided: Oct 6, 2017 after 249 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
Longest line of descent: 1 generation back to K133975 (2014). 1 ancestor in all.
3 later devices descend from it; 2 cite 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)
- K133975: MSA100 Peak Flow Meter, Beijing M&B Electronic Instruments Co., Ltd. (2014) Summary page 4.

## Most influential descendants
- 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/K170281
Methodology: https://510kreport.com/methodology