510(k) · Cleared
ClearedChad Therapeutics Oxypenumatic Cypress Model 511
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Chad Therapeutics, Inc. · NFB Conserver, Oxygen
Cleared on Jul 5, 2002 as substantially equivalent to K992659 (Thermadyne Holings Corp., 1999) and 2 other predicates after a 143-day review. Its family tree reaches back 2 generations to 1996. 3 later devices descend from it.
- Decided
- Jul 5, 2002
- Review
- 143 days
- Class
- Class II
- Product code
- NFB
- Recalls
- None
- Predicates
- 3
Its longest line of descent runs back 2 generations to K963247 (1996). 4 ancestors in all. 3 later devices descend from it, 2 citing it directly.
- Root · 2 generations backK963247 Victor Model Ocpr Oxygen Conserving Pressure RegulatorThermadyne Holings Corp. · 1996
- 1 generation backK992659 O2N Demand-II, Victor Model Ocpr-IIThermadyne Holings Corp. · 1999
- This deviceK020475 Chad Therapeutics Oxypenumatic Cypress Model 511Chad Therapeutics, Inc. · 2002
- Descendant · cites it directly · 1 of its ownK070740 Chad Therapeutics Bonsai Model 800Chad Therapeutics, Inc. · 2007
- Descendant · 2 generations on · 0 of its ownK250322 Respond OC Conserving Regulator (130-0800)Responsive Respiratory · 2025
- Descendant · cites it directly · 0 of its ownK060751 Inovo, Inc. Accupulse Single Lumen Conserving RegulatorInovo, Inc. · 2006 · Recalled
Most influential descendants
Showing 3 of 3 · See all- K070740Chad Therapeutics Bonsai Model 800Chad Therapeutics, Inc. · 2007 · cites it directly1descendant
- K250322Respond OC Conserving Regulator (130-0800)Responsive Respiratory · 2025 · 2 generations on0descendants
- K060751Inovo, Inc. Accupulse Single Lumen Conserving RegulatorInovo, Inc. · 2006 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K963247 | Victor Model Ocpr Oxygen Conserving Pressure Regulator | Thermadyne Holings Corp. | 1996 | — |
| −1 | K992659 | O2N Demand-II, Victor Model Ocpr-II | Thermadyne Holings Corp. | 1999 | — |
| 0 (this device) | K020475 | Chad Therapeutics Oxypenumatic Cypress Model 511 | Chad Therapeutics, Inc. | 2002 | — |
| +1 | K070740 | Chad Therapeutics Bonsai Model 800 | Chad Therapeutics, Inc. | 2007 | — |
| +2 | K250322 | Respond OC Conserving Regulator (130-0800) | Responsive Respiratory | 2025 | — |
| +1 | K060751 | Inovo, Inc. Accupulse Single Lumen Conserving Regulator | Inovo, Inc. | 2006 | 1 |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2001 | 2 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2025 | 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 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? (3)
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 |
|---|---|---|---|
| * | K992659 | O2N Demand-II, Victor Model Ocpr-IISummary page 1…redicate Device Equivalence: Substantial equivalence is claimed to the Victor Medical Products 02n Demand II cleared for commercial distribution per K992659, the Western Medica OPC Oxygen Conserving Device cleared for commercial distribution per KO10747 and the Precision… | 1999 |
| * | K010747 | Opc Oxygen Conserving Regulator, Model Ahg 1968, Lin-7005, MDL-7609, Mem-7612, Opc-830 | 2001 |
| * | K001412 | PM 1800 Conserving Device | 2001 |
What descends from it? (3)
2 later devices cite it directly; ranked here by how many devices descend from each in turn.
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?
- The line of descent spans 6 years and passes through 2 companies; a new generation was cleared every 2.8 years on median.
- 1 of the 4 ancestors has a recall of any class.
- Of its descendants, K070740 (Chad Therapeutics, Inc., 2007) has gone furthest, with 1 descendant of its own.
- 1 other device also cites its predicate K992659.
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 Chad Therapeutics OXYPNEUMATIC CYPRESS Model 511 is intended for
prescription use only, to be used as part of a portable oxygen delivery system for
patients that require supplemental oxygen in their home and for ambulatory use.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K020475 · printed Nov 6, 2026
Cite this page
510(k) Report. “K020475: Chad Therapeutics Oxypenumatic Cypress Model 511.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K020475
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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