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What Is a Hyperbaric Chamber?

A hyperbaric chamber is a sealed medical chamber used for hyperbaric oxygen therapy. During treatment, the chamber is pressurized while the patient breathes oxygen. The higher pressure helps the lungs take in more oxygen than usual, which increases the amount of oxygen carried in the blood. Hyperbaric chambers are used only under medical supervision for specific approved or clinically supported conditions.

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What Is a Hyperbaric Chamber?

A hyperbaric chamber is a sealed medical chamber used for hyperbaric oxygen therapy. During treatment, the chamber is pressurized while the patient breathes oxygen. The higher pressure helps the lungs take in more oxygen than usual, which increases the amount of oxygen carried in the blood. Hyperbaric chambers are used only under medical supervision for specific approved or clinically supported conditions.

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What Is a Hyperbaric Chamber Used For?

A hyperbaric chamber is used to treat conditions where extra oxygen under pressure may help tissue healing or reduce injury. It may be used for decompression sickness, carbon monoxide poisoning, gas embolism, certain severe infections, radiation tissue injury, and selected nonhealing wounds. It can also support healing in some skin graft or crush injury cases. The care team decides whether treatment is appropriate based on diagnosis, risks, and treatment goals.

How a Hyperbaric Chamber Works

The chamber increases air pressure around the patient while oxygen is delivered for breathing. Under higher pressure, more oxygen dissolves into the blood plasma and can reach tissues with low oxygen supply. Treatments are given for a set time and may require multiple sessions. The exact pressure, oxygen delivery method, and session length depend on the condition being treated.

Types of Hyperbaric Chambers

A monoplace hyperbaric chamber is designed for one person and usually looks like a clear tube or capsule. A multiplace chamber can hold more than one person and may allow staff to enter the chamber during treatment. Some chambers deliver oxygen through a hood or mask, while others use the chamber environment. Medical-grade chambers differ from nonmedical wellness devices and should meet clinical safety standards.

Risks and Safety Precautions

Hyperbaric oxygen therapy can cause ear pressure, sinus pain, temporary vision changes, fatigue, low blood sugar in some patients, or oxygen toxicity in rare cases. Untreated pneumothorax is a major safety concern because pressure changes can be dangerous. Oxygen also increases fire risk, so patients must follow rules about clothing, electronics, oils, and flammable items. Chest pain, trouble breathing, severe ear pain, vision changes, or neurologic symptoms should be reported right away.

FAQs About Hyperbaric Chambers

Is a hyperbaric chamber the same as oxygen therapy?

It is a specialized form of oxygen therapy. Hyperbaric oxygen therapy delivers oxygen while the patient is inside a pressurized chamber.

Does hyperbaric chamber treatment hurt?

It should not be painful, but ear pressure or sinus pressure can happen during pressure changes. Patients should tell staff if discomfort becomes strong.

How long does a hyperbaric chamber session take?

Session length varies by condition and protocol, but treatments often last around one to two hours. The care team sets the schedule.

Can anyone use a hyperbaric chamber?

No. Patients need medical screening because some conditions, medications, lung problems, or ear problems can make treatment unsafe or unsuitable.

References

Hyperbaric Oxygen Therapy: What It Is & Benefits, Side Effects. Cleveland Clinic. https://my.clevelandclinic.org/health/treatments/17811-hyperbaric-oxygen-therapy. Date Accessed June 18, 2026.

Hyperbaric oxygen therapy. Mayo Clinic. https://www.mayoclinic.org/tests-procedures/hyperbaric-oxygen-therapy/about/pac-20394380. Date Accessed June 18, 2026.

Hyperbaric oxygen therapy. MedlinePlus Medical Encyclopedia. https://medlineplus.gov/ency/article/002375.htm. Date Accessed June 18, 2026.

Hyperbaric Oxygen Therapy. MedlinePlus. https://medlineplus.gov/oxygentherapy.html. Date Accessed June 18, 2026.

Hyperbaric Oxygen Therapy Contraindications. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK557661/. Date Accessed June 18, 2026.