510(k) · Cleared
ClearedPortable Therapeutic Oxygen Concentration System (Ptocs)
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Essex Cryogenics of Missouri, Inc. · CAW Generator, Oxygen, Portable
Cleared on Sep 11, 2002 as substantially equivalent to K013223 (Litton Systems, Inc., 2002) and 1 other predicate after a 30-day review. Its family tree reaches back 1 generation to 1990. 1 later device descends from it.
- Decided
- Sep 11, 2002
- Review
- 30 days
- Class
- Class II
- Product code
- CAW
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 1 generation to K904087 (1990). 2 ancestors in all. 1 later device descends from it, 1 citing it directly.
- Root · 1 generation backK904087 Mobilaire Iii and V Model Irc 301 and 501 Oxy. ConInvacare Corp. · 1990
- This deviceK022684 Portable Therapeutic Oxygen Concentration System (Ptocs)Essex Cryogenics of Missouri, Inc. · 2002
- Descendant · cites it directly · 0 of its ownK131990 Oxygen Generator Liquefier - (Ogl)Essex Cryogenics of Missouri, Inc. · 2014
Most influential descendants
Showing 1 of 1 · See all- K131990Oxygen Generator Liquefier - (Ogl)Essex Cryogenics of Missouri, Inc. · 2014 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −1 | K904087 | Mobilaire Iii and V Model Irc 301 and 501 Oxy. Con | Invacare Corp. | 1990 | — |
| 0 (this device) | K022684 | Portable Therapeutic Oxygen Concentration System (Ptocs) | Essex Cryogenics of Missouri, Inc. | 2002 | — |
| +1 | K131990 | Oxygen Generator Liquefier - (Ogl) | Essex Cryogenics of Missouri, Inc. | 2014 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2002 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2014 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in CAW? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new CAW device
- #1 K230052 Inogen Rove 6score 29.9 · 2 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (2)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K013223 | Patient Ventilation Oxygen Concentrating System (Pvocs) | 2002 |
| * | K904087 | Mobilaire Iii and V Model Irc 301 and 501 Oxy. ConSummary page 1…lence is claimed: Patient Ventilation Oxygen Concentrating System KO1 3223 Invacare 6 Oxygen Concentrator K904087 Description: The Portable Therapeutic Oxygen Concentration System (PTOCS) has been designed to accommodate Military Personnel w… | 1990 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K131990 | Oxygen Generator Liquefier - (Ogl) | 2014 | 0 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
How does its category compare?
All CAW devicesCAW Generator, Oxygen, Portable: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · CAW
12in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · CAW
178in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · CAW
1in 2025
Class I (1 since 2007) Class II/III not classified
Adverse event reports per year · CAW
611in 2025
MAUDE reports naming product code CAW, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 6 | 143 | 1 | 23 |
| 2008 | 11 | 90 | 3 | 25 |
| 2009 | 8 | 193 | 2 | 43 |
| 2010 | 5 | 133 | 0 | 48 |
| 2011 | 6 | 174 | 1 | 167 |
| 2012 | 5 | 148 | 0 | 395 |
| 2013 | 2 | — | 2 | 2,309 |
| 2014 | 6 | 277 | 2 | 24,538 |
| 2015 | 1 | — | 0 | 18,973 |
| 2016 | 1 | — | 1 | 3,167 |
| 2017 | 1 | — | 1 | 107 |
| 2018 | 3 | 203 | 0 | 116 |
| 2019 | 2 | — | 2 | 120 |
| 2020 | 5 | 224 | 1 | 125 |
| 2021 | 2 | — | 0 | 194 |
| 2022 | 4 | 458 | 2 | 305 |
| 2023 | 8 | 261 | 0 | 357 |
| 2024 | 2 | — | 5 (1) | 450 |
| 2025 | 12 | 178 | 1 | 611 |
| 2026 | 6 | 260 | 0 | — |
What is it indicated for?
Provides supplemental therapeutic oxygen to a patient in a military field hospital setting.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K022684 · printed Nov 6, 2026
Cite this page
510(k) Report. “K022684: Portable Therapeutic Oxygen Concentration System (Ptocs).” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K022684
Report an extraction error
Are you the manufacturer?
Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026