# K880183: Portable Therapeutic Liquid Oxygen Unit

- Pathway: 510(k) (Traditional)
- Applicant: Essex Cryogenics of Missouri, Inc.
- Decided: Apr 14, 1988 after 90 days
- Product code: BYJ (Unit, Liquid-Oxygen, Portable)
- Device class: 2
- Regulation: 21 CFR 868.5655
- 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; 1 cites 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
- K033000: Next Generation Portable Therapeutic Liquid Oxygen System (2004), 4 descendants of its own
- K071581: Backpack Medical Oxygen System (2007), 1 descendant of its own
- K130068: Dismounted Medical & Supplemental Oxygen System (Dmos) (2013), 0 descendants of its own
- K113767: Mounted Medical Oxygen System (2012), 0 descendants of its own
- K101272: Mass Oxygen Distribution System (Mods) Model 10C-0061-3 (2010), 0 descendants of its own

Source page: https://510kreport.com/device/K880183
Methodology: https://510kreport.com/methodology