510(k) · Cleared
ClearedEssex High Pressure (HP) Ocd and Essex Escort Pneumatic Conserver
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Essex Medical Systems Plus · NFB Conserver, Oxygen
Cleared on Oct 1, 2003 after a 300-day review. FDA’s file for it is a 510(k) statement, which names no predicate. 3 later devices descend from it.
- Decided
- Oct 1, 2003
- Review
- 300 days
- Class
- Class II
- Product code
- NFB
- Recalls
- None
- Predicates
- 0
3 later devices descend from it, 1 citing it directly.
- This deviceK024023 Essex High Pressure (HP) Ocd and Essex Escort Pneumatic ConserverEssex Medical Systems Plus · 2003
- Descendant · cites it directly · 2 of its ownK090421 Model 350G Gas ConserverInspired Technologies, Inc. · 2009
- Descendant · 2 generations on · 0 of its ownK221014 Effortless Oxygen Conserver System Models Effortless Pro and…Effortless Oxygen, LLC · 2022
- Descendant · 2 generations on · 0 of its ownK200401 ApogeeIncoba Ltd D/B/A Dynaris · 2020
Most influential descendants
Showing 3 of 3 · See all- K090421Model 350G Gas ConserverInspired Technologies, Inc. · 2009 · cites it directly2descendants
- K221014Effortless Oxygen Conserver System Models Effortless Pro and Effortless MobileEffortless Oxygen, LLC · 2022 · 2 generations on0descendants
- K200401ApogeeIncoba Ltd D/B/A Dynaris · 2020 · 2 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K024023 | Essex High Pressure (HP) Ocd and Essex Escort Pneumatic Conserver | Essex Medical Systems Plus | 2003 | — |
| +1 | K090421 | Model 350G Gas Conserver | Inspired Technologies, Inc. | 2009 | — |
| +2 | K221014 | Effortless Oxygen Conserver System Models Effortless Pro and Effortless Mobile | Effortless Oxygen, LLC | 2022 | — |
| +2 | K200401 | Apogee | Incoba Ltd D/B/A Dynaris | 2020 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2009 | 1 | 0 |
| 2020 | 1 | 0 |
| 2022 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA 510(k) statement (indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in NFB? 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 NFB device
- #1 K250322 Respond OC Conserving Regulator (130-0800)score 10.6 · 4 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against?
FDA’s file for it is a 510(k) statement, which names no predicate.
What descends from it? (3)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K090421 | Model 350G Gas Conserver | 2009 | 2 |
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?
- Of its descendants, K090421 (Inspired Technologies, Inc., 2009) has gone furthest, with 2 descendants of its own.
How does its category compare?
All NFB devicesNFB Conserver, Oxygen: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · NFB
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · NFB
Too few NFB 510(k)s in any year since 2007 to give a median.
Recalls per year · NFB
3in 2007
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · NFB
8in 2025
MAUDE reports naming product code NFB, 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 | 1 | — | 3 | 3 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 1 | — | 0 | 0 |
| 2010 | 1 | — | 0 | 0 |
| 2011 | 1 | — | 0 | 1 |
| 2012 | 0 | — | 0 | 3 |
| 2013 | 1 | — | 0 | 5 |
| 2014 | 0 | — | 0 | 2 |
| 2015 | 0 | — | 0 | 4 |
| 2016 | 1 | — | 0 | 0 |
| 2017 | 0 | — | 0 | 9 |
| 2018 | 0 | — | 0 | 0 |
| 2019 | 0 | — | 0 | 0 |
| 2020 | 1 | — | 0 | 3 |
| 2021 | 0 | — | 0 | 2 |
| 2022 | 2 | — | 0 | 1 |
| 2023 | 0 | — | 0 | 4 |
| 2024 | 0 | — | 0 | 1 |
| 2025 | 1 | — | 0 | 8 |
| 2026 | 0 | — | 0 | — |
What is it indicated for?
The Essex High Pressure (HP) OCD and Essex Escort Pneumatic Conserver are used to deliver a prescribed flow of gas to the patient while conserving gas, by sensing the patient inhalation cycle and supplying gas only during that phase of breathing.
Indications for use as stated in the FDA 510(k) statement.
https://510kreport.com/device/K024023 · printed Nov 4, 2026
Cite this page
510(k) Report. “K024023: Essex High Pressure (HP) Ocd and Essex Escort Pneumatic Conserver.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K024023
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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