21 CFR 868.5470 — Hyperbaric Chamber
Technology context Federal device classification for hyperbaric chambers
Finding: Defines a hyperbaric chamber as a device intended to increase environmental oxygen pressure to promote movement of oxygen from the environment to a patient’s tissue by pressurisation greater than atmospheric, and classifies it as Class II (performance standards).
Main limitation: A classification regulation defines a device category. It does not indicate that any particular chamber has been cleared, nor endorse any use.
Executive summary
This is the primary source a buyer can check when a seller makes a regulatory claim about a hyperbaric chamber, and it is short enough to read in full.
The regulation states that a hyperbaric chamber is a device intended to increase the environmental oxygen pressure to promote the movement of oxygen from the environment to a patient's tissue by means of pressurization that is greater than atmospheric pressure. It excludes topical oxygen chambers for extremities, which are classified separately.
Its classification is Class II (performance standards).
That single word - patient - is worth pausing on. The federal definition of this device category describes its use on a patient, which situates it in medical rather than general wellness use.
Class II devices are generally subject to premarket notification, the 510(k) process, under which a manufacturer demonstrates substantial equivalence to a legally marketed predicate device. Clearance through 510(k) is not the same as premarket approval, and neither is the same as registration or listing.
Nothing in this regulation states that any particular chamber has been cleared, or that hyperbaric therapy is effective for any condition. It defines a category.
Why this research matters
Regulatory language is the most commonly abused element of marketing in this category, and this is the primary source against which claims can be checked.
Knowing that hyperbaric chambers are Class II devices defined in terms of a patient makes it much easier to evaluate a chamber marketed as a general wellness product.
Study design
- Document type
- Federal device classification regulation
- Citation
- 21 CFR 868.5470
- Part
- Part 868 - Anesthesiology Devices, Subpart F - Therapeutic Devices
- Identification
- A device intended to increase the environmental oxygen pressure to promote the movement of oxygen from the environment to a patient’s tissue by means of pressurization greater than atmospheric pressure
- Explicit exclusion
- Topical oxygen chambers for extremities, classified at § 878.5650
- Classification
- Class II (performance standards)
- Study design, sample, population, outcomes
- Not applicable - this is regulation, not research
What the researchers found
The regulation provides two operative elements.
(a) Identification. A hyperbaric chamber is a device that is intended to increase the environmental oxygen pressure to promote the movement of oxygen from the environment to a patient's tissue by means of pressurization that is greater than atmospheric pressure. This device does not include topical oxygen chambers for extremities, which are classified at § 878.5650.
(b) Classification. Class II (performance standards).
No study results, effect sizes, or statistical measures exist in this document, and none are reproduced here.
What the results mean
Class II is the middle of the FDA's three device classes. It indicates that general controls alone are insufficient to provide reasonable assurance of safety and effectiveness, and that special controls apply. Most Class II devices reach market through the 510(k) premarket notification pathway.
For a buyer the practical translation is a vocabulary test. A chamber that has been through 510(k) is 'cleared'. A manufacturer that has completed establishment registration is 'registered'. A device entered in the device listing is 'listed'. None of these is 'approved', which describes the premarket approval pathway used mainly for Class III devices.
A seller who uses these terms interchangeably is either unfamiliar with their own regulatory position or hoping you are.
What this study does not prove
- It does not indicate that any particular chamber has been cleared by the FDA.
- It does not establish that hyperbaric therapy is effective for any condition.
- It does not endorse any use, manufacturer, or product.
- Class II classification is not a statement about clinical benefit.
- It does not address lower-pressure chambers marketed for general wellness, which may or may not fall within this definition depending on their intended use claims.
- It contains no safety data.
Evidence strength
Regulatory guidance (federal regulation)
This is binding federal regulation rather than guidance, research, or opinion. It defines a device category and assigns its classification.
Regulation of this kind establishes what a device is and what regulatory controls apply. It says nothing about whether a device works, and it is not evidence of efficacy for any indication.
Strengths and limitations
Strengths
- Primary source: binding federal regulation, not a secondary interpretation.
- Publicly accessible and directly verifiable through the eCFR.
- Unambiguous classification statement.
- Explicitly excludes a related device category, which sharpens the definition.
- Current rather than historical.
Limitations
- Extremely brief; it defines a category and nothing more.
- Contains no efficacy or safety evidence.
- Does not identify cleared devices; that requires searching the 510(k) database.
- Intended-use language means classification can depend on the claims a manufacturer makes, which is not resolved within the regulation itself.
Does this apply to the equipment IMPERVITA sells?
This applies to any hyperbaric chamber whose intended use matches the identification language.
It is the correct reference for checking a regulatory claim. If a chamber is described as FDA cleared, the classification here tells you which pathway that means, and the FDA safety communication in this library tells you how to verify it - by searching Product Code CBF in the 510(k) database.
Where it becomes genuinely uncertain is at the boundary. A chamber marketed for general wellness rather than for moving oxygen into a patient's tissue may be positioned outside this classification by its manufacturer. Whether that positioning is legitimate depends on the claims made, which is precisely the question the FDA's general wellness guidance addresses.
Evidence in context
This regulation should be read alongside the FDA's August 2025 safety communication on hyperbaric oxygen therapy devices, which confirms the Class II status and 510(k) pathway and provides the practical means of verifying a specific device.
The FDA's general wellness guidance defines the boundary between a low-risk general wellness product and a regulated medical device, which is the framework determining whether a lower-pressure wellness chamber falls inside or outside this classification.
The FTC's health products compliance guidance governs the advertising claims made about either.
Related research
- Follow instructions for safe use of hyperbaric oxygen therapy devices - letter to health care providers The FDA safety communication confirming Class II status, the 510(k) pathway, and Product Code CBF.
- General wellness: policy for low risk devices - guidance for industry and FDA staff The guidance defining the general wellness boundary that determines whether a device falls within this classification.
- Health products compliance guidance The advertising substantiation standard applying to claims made about these devices.
Practical buyer relevance
Use this entry as a vocabulary check before any hyperbaric conversation.
Ask: is this chamber FDA cleared, and for what indication? Then ask for the documentation, and verify it against Product Code CBF in the 510(k) database rather than accepting a statement.
If the answer is that the manufacturer is 'FDA registered' or the device is 'FDA listed', those are administrative filings that involve no review of safety or effectiveness. If the answer is 'FDA approved', ask which premarket approval it holds, because that pathway is rarely applicable here.
The precision of the answer tells you a great deal about the seller.
Safety context
This regulation contains no safety data. For safety guidance on hyperbaric equipment, see the FDA's August 2025 letter to health care providers listed in this library, which addresses fire risk in oxygen-enriched environments, training, supervision and maintenance.
Anyone considering hyperbaric equipment should speak to a physician first. IMPERVITA is an equipment retailer and advisor and does not provide medical treatment or diagnosis.
Full source record
- Title
- 21 CFR 868.5470 — Hyperbaric Chamber
- Authors
- U.S. Food and Drug Administration / Office of the Federal Register
- Organization
- Office of the Federal Register / U.S. Food and Drug Administration
- Publication
- Code of Federal Regulations, Title 21
- Year
- Current
- Volume / issue / pages
- 21 CFR Part 868, Subpart F, Section 868.5470
- Study type
- Federal device classification regulation
- Sample size
- Not applicable
- Population
- Not applicable
- Topic
- Hyperbaric, regulatory, Safety
- Document type
- Regulatory guidance
- Technology context
- Federal device classification for hyperbaric chambers
- Related equipment context
- Hyperbaric Systems
- Source last verified
- 19 August 2026
References
Information provided by IMPERVITA is for educational and general wellness purposes and is not intended to replace professional medical advice, diagnosis, or treatment.
