# K992503: Sechrist Air-Oxygen Mixer, 3500/3500HL Series

- Pathway: 510(k) (Special)
- Applicant: Sechrist Industries, Inc.
- Decided: Aug 10, 1999 after 14 days
- Product code: BZR (Mixer, Breathing Gases, Anesthesia Inhalation)
- Device class: 2
- Regulation: 21 CFR 868.5330
- 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 K802226 (1980). 1 ancestor in all.
5 later devices descend from it; 1 cites it directly.
0 of 7 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K802226: Sechrist Series 3500 Air-Oxygen Mixer, Sechrist Industries, Inc. (1980) Summary page 1.

## Most influential descendants
- K023745: Sechrist Air/Oxygen Mixer, Model 3500 CP-G (2003), 4 descendants of its own
- K101046: Stockert S5 System and Gas Blender and Sorin C5 System (2010), 3 descendants of its own
- K181942: Quantum Ventilation Module (2018), 2 descendants of its own
- K202733: Quantum Ventilation Module (2020), 1 descendant of its own
- K210669: Quantum Mini Ventilation Module (2021), 0 descendants of its own

## Indications for use
The purpose of the device is to enable qualified personnel to mix medical grade air and medical grade oxygen, at operator selected ratios, for delivery to patients through various types of respiratory care equipment.

Source page: https://510kreport.com/device/K992503
Methodology: https://510kreport.com/methodology