# K130068: Dismounted Medical & Supplemental Oxygen System (Dmos)

- Pathway: 510(k) (Traditional)
- Applicant: Essex Industries, Inc. D/B/A Essex Cryogenics of M
- Decided: Jul 19, 2013 after 189 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
Longest line of descent: 3 generations back to K880183 (1988). 3 ancestors in all.
No later device cites it as a predicate yet.
0 of 4 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K071581: Backpack Medical Oxygen System, Essex Cryogenics of Missouri, Inc. (2007) Summary page 1.

## Indications for use
The DMOS is intended to convert liquid oxygen to gaseous oxygen for delivery to a patient and/or for delivery to rescue personnel to supplement environmental oxygen at high altitudes while being carried by a rescue personnel at one-half (0.5) to fifteen (15) liters per minute (LPM) and fifty (50) pounds per square inch gauge (psig).

Source page: https://510kreport.com/device/K130068
Methodology: https://510kreport.com/methodology