# K020475: Chad Therapeutics Oxypenumatic Cypress Model 511

- Pathway: 510(k) (Traditional)
- Applicant: Chad Therapeutics, Inc.
- Decided: Jul 5, 2002 after 143 days
- Product code: NFB (Conserver, Oxygen)
- Device class: 2
- Regulation: 21 CFR 868.5905
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 2 generations back to K963247 (1996). 4 ancestors in all.
3 later devices descend from it; 2 cite it directly.
0 of 8 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K992659: O2N Demand-II, Victor Model Ocpr-II, Thermadyne Holings Corp. (1999) Summary page 1.
- K010747: Opc Oxygen Conserving Regulator, Model Ahg 1968, Lin-7005, MDL-7609, Mem-7612, Opc-830, Western Ent. (2001)
- K001412: PM 1800 Conserving Device, Precision Medical, Inc. (2001)

## Most influential descendants
- K070740: Chad Therapeutics Bonsai Model 800 (2007), 1 descendant of its own
- K250322: Respond OC Conserving Regulator (130-0800) (2025), 0 descendants of its own
- K060751: Inovo, Inc. Accupulse Single Lumen Conserving Regulator (2006), 0 descendants of its own

## Indications for use
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.

Source page: https://510kreport.com/device/K020475
Methodology: https://510kreport.com/methodology