Why we choose high-purity medical oxygen for HBOT

Why the oxygen supply is part of the treatment

In hyperbaric oxygen therapy (HBOT), oxygen is used as a medicine. The doctor chooses the oxygen concentration, chamber pressure and time spent breathing it. Buying a chamber is only one part of delivering that treatment.

The Undersea and Hyperbaric Medical Society’s clinical HBOT guidance calls for medical oxygen above 99% purity. A standard concentrator supplying 90% to 96% does not meet that requirement. That is why we recommend high-purity medical oxygen in cylinders for the FINK setups we offer.

What counts as HBO₂?

HBO₂ is prescribed and supervised by a physician. The UHMS definition calls for a hard-sided chamber built to ASME PVHO-1 and NFPA 99, at not less than 2.0 ATA, with medical oxygen above 99% purity. Read the UHMS 2026 position statement.

Lower concentration means less oxygen at the same pressure

A concentrator takes room air and removes much of its nitrogen. Standard models commonly supply around 93% oxygen. The recognised grade Oxygen 93 Percent allows a range of 90% to 96%. By comparison, USP Oxygen, a high-purity medical grade, requires at least 99%.

At the same chamber pressure, a lower oxygen concentration means a lower oxygen partial pressure, which is the part of the total pressure supplied by oxygen. If breathing conditions are otherwise the same, 93% oxygen does not provide the same oxygen exposure as near-100% oxygen.

For a treatment prescribed with near-100% oxygen, a standard concentrator falls short of the specified concentration. Do not assume a longer session or a higher pressure makes it equivalent. Only the clinical team should set or change the treatment.

Match the treatment used in the research

A research result belongs to the treatment that was actually tested. The oxygen concentration, pressure, session length and number of visits all matter.

For example, a 2022 randomised trial in people with post-COVID symptoms used 100% oxygen through a mask at twice normal atmospheric pressure, with planned air breaks. It did not test replacing that supply with a standard 93% concentrator.

A study using 100% oxygen is not evidence that a lower-concentration setup gives the same results. Ask the clinical team how the proposed treatment matches the research. Matching the oxygen supply is necessary to reproduce that part of a treatment. It does not guarantee the same result for every person.

Why we specify medical oxygen

Medical oxygen must meet standards for purity, unwanted substances and safe handling. The World Health Organization explains why industrial oxygen cannot simply replace it. A high purity number alone does not make a gas suitable for patients.

Ask for the medical grade, its purity specification and the supplier’s quality documents. The installer and clinical team should confirm that the supply meets the chamber’s instructions and the treatment plan.

Some concentrator oxygen qualifies as medical oxygen under the separate Oxygen 93 standard. That label does not make it equivalent to the high-purity supply required here. Our recommendation remains medical oxygen cylinders that meet the prescribed specification.

Get the prescribed oxygen to the person breathing it

The cylinder is the starting point. The mask, tubing, flow and supply pressure must also work correctly so the person receives the intended oxygen concentration during treatment.

A loose mask can let chamber air mix with the oxygen. Research on hyperbaric breathing masks shows why fit matters. The installation team should check the complete breathing system at the pressure it will be used.

High-purity medical oxygen, a suitable mask and enough flow belong together. A cylinder label alone cannot confirm what reaches the lungs.

What the difference means for a buyer

Plan cylinder deliveries and storage before ordering the chamber. Make sure there is enough oxygen for the expected sessions and a suitable reserve. Follow the manufacturer’s instructions and fire-safety, training and supervision requirements.

The FINK and Dubai clinic approach

The FINK FESL line includes one-seat, two-seat, three-seat and four-seat configurations. The three-seat model mentioned below is one example from the range.

FINK describes its home system as an air-filled chamber with a separate supply of 100% medical oxygen through a personal mask. Its three-seat FESL-323 (Trio) specifies oxygen cylinders with automatic changeover between them. The air that pressurises the cabin and the oxygen the person breathes have separate jobs.

For the FINK FESL systems we offer, high-purity medical oxygen in cylinders is the supply we recommend. Confirm the exact grade, connections and reserve arrangements with FINK as part of the installation.

The Dubai clinic we introduce patients to describes its treatment as 100% oxygen through individual masks. Its published treatment description explains that air breaks are managed by staff.

For a model-specific example, review the FESL-323 chamber details and the manufacturer’s listed oxygen supply.

Plan the oxygen supply before you buy

Ask for a complete plan covering the medical oxygen grade, cylinder storage, deliveries, reserve supply and breathing masks. Confirm who will install and service the system, who will operate it and which doctor will oversee treatment.

HBO₂ Health works with FINK Engineering on chamber sales and helps buyers worldwide explore chamber projects. Send us your location, intended setting, number of users and timeframe so we can help you discuss the chamber and its medical oxygen supply together. Clinic treatment is arranged separately.

Specifications and availability are confirmed per project in FINK’s written proposal.