Home Oxygen vs. Hyperbaric Oxygen Therapy: What's the Difference?
Lisa St. John, M.S.
Lisa is our Clinic Director and Founder. She earned her Master's degree from Harvard University, completed a Fellowship at Stanford University, and has spent the last 30 years working in the healthcare field.
Home oxygen and hyperbaric oxygen therapy (HBOT) both involve breathing extra oxygen, but they treat different problems and work in different ways. Home oxygen helps people whose blood oxygen is too low. HBOT uses 100% oxygen inside a pressurized chamber to dissolve far more oxygen into the blood, helping tissue that is injured or struggling to heal. One cannot stand in for the other.
"I Already Have an Oxygen Machine. Isn't That the Same Thing?"
It's a very common question, and it makes sense. If you or a loved one uses an oxygen concentrator at home, "oxygen therapy" sounds like oxygen therapy. And plenty of people are curious about HBOT after seeing it mentioned for wound care or recovery.
The two are quite different. Here's how.
How Home Oxygen Works
A home oxygen concentrator pulls in room air and delivers oxygen-enriched air, usually through a nasal tube (cannula) or mask. It works at normal air pressure.
Doctors prescribe it for people whose blood oxygen is low because of lung or heart conditions such as COPD. The goal is to bring oxygen levels back up so the body can function comfortably. It's often used for many hours a day, sometimes around the clock.
How HBOT Works
HBOT happens inside a sealed chamber pressurized above normal air pressure, while you breathe 100% oxygen. Under pressure, oxygen doesn't only ride on red blood cells. Much more of it dissolves directly into the plasma, the liquid part of blood. That means oxygen can reach tissue where circulation is poor or blocked.
Higher oxygen levels in injured tissue can support the body's healing: fighting certain infections, encouraging new blood vessels to grow and calming swelling. HBOT is used in scheduled sessions, often over a series of weeks, not around the clock.
Side by Side
Home oxygen | Hyperbaric oxygen therapy | |
Pressure | Normal air pressure | Above normal, inside a chamber |
Oxygen | Enriched air, below 100% | 100% oxygen |
Main purpose | Treat low blood oxygen | Heal injured or poorly oxygenated tissue |
Typical use | Many hours a day, ongoing | Scheduled sessions over several weeks |
Where | At home | A clinic or hospital |
Prescription needed | Yes | Yes, with medical screening |
Why Pressure Makes the Difference
In a healthy person, the red blood cells are already almost fully loaded with oxygen. Breathing more oxygen at normal pressure adds only a tiny extra amount dissolved in plasma. Pressure changes that math. By raising the pressure around the body, HBOT can increase the oxygen dissolved in plasma many times over, which is why it can reach areas a concentrator can't.
What HBOT Is Used For
HBOT is recognized by the FDA for specific conditions, including diabetic foot ulcers, radiation tissue injury, compromised skin grafts and flaps, certain serious infections and carbon monoxide poisoning. It is not a substitute for prescribed home oxygen, and home oxygen isn't a substitute for HBOT.
A Note on "Mild" Home Chambers
You may see portable or soft-sided chambers marketed for home use. These operate at much lower pressures than clinical hyperbaric chambers and are not the same treatment. If you're considering any pressurized device, talk with a healthcare provider first.
Safety and Expert Care
Oxygen is safe when used properly, and it also increases fire risk, which is why strict rules apply to both home oxygen and hyperbaric chambers. At Bay Area Hyperbarics, we screen every patient, explain what to expect and keep safety at the center of each session.
Consult a healthcare provider before starting any new treatment. This article is for educational purposes and does not replace medical advice from your care team.
Frequently Asked Questions
Is hyperbaric oxygen the same as oxygen therapy at home? No. Home oxygen treats low blood oxygen at normal pressure. HBOT delivers 100% oxygen under pressure to support healing in injured tissue.
Can an oxygen concentrator replace HBOT? No. A concentrator can't raise the oxygen dissolved in your blood the way a pressurized chamber does.
Can I do HBOT if I use home oxygen? Often yes, but it needs physician review, especially if you have lung disease like COPD. Tell our team about your oxygen use at your consultation.
Can I use my home oxygen equipment in the chamber? No. Personal equipment isn't allowed inside the chamber for fire safety. Our team provides the oxygen during treatment.
Does insurance cover HBOT like it covers home oxygen? Coverage is separate and depends on the condition being treated. Medicare covers HBOT for specific approved indications.
Curious whether HBOT could help you or a loved one? Call our team for a consultation.
