Hyperbaric Oxygen Therapy for Avascular Necrosis
Avascular necrosis, also known as osteonecrosis, develops when reduced blood supply causes damage to bone tissue. Hyperbaric Oxygen Therapy (HBOT) has been investigated as a possible additional intervention for selected patients, particularly in research involving the hip.
Researchers have explored whether increased oxygen availability within a controlled hyperbaric environment could influence tissue conditions associated with reduced blood supply.
However, current clinical evidence remains inconclusive, and HBOT should not be regarded as an established treatment for avascular necrosis.
What Is Avascular Necrosis?
Avascular necrosis occurs when a bone receives an insufficient blood supply. Over time, this can lead to damage or death of bone tissue and, in more advanced cases, changes to the structure of the affected joint.
Although avascular necrosis can develop in different areas of the body, it is frequently associated with the femoral head, which forms part of the hip joint.
Factors associated with the condition can include:
- Previous fractures or joint injuries.
- Long-term or high-dose corticosteroid use.
- Excessive alcohol consumption.
- Certain blood disorders and medical conditions.
- Reduced circulation affecting bone tissue.
Some people experience few symptoms during the early stages. As the condition progresses, pain, stiffness and reduced mobility may become more noticeable.
Early medical assessment is important because management options can depend on the extent of bone damage.
Why Is Hyperbaric Oxygen Therapy Being Researched?
Bone tissue relies on an adequate supply of oxygen and nutrients for normal cellular activity.
Researchers have investigated whether the increased oxygen availability associated with clinical HBOT might influence the environment within areas of bone affected by reduced circulation.
Several possible mechanisms have been explored.
Oxygen Availability Within Bone Tissue
Clinical HBOT increases the amount of oxygen dissolved in blood plasma. This has prompted research into whether additional oxygen could reach certain areas of tissue where normal circulation is impaired.
Bone and Tissue Responses
Studies have examined possible changes in tissue activity and biological processes associated with bone health during hyperbaric oxygen exposure.
Pain and Joint Function
Some research has investigated patient-reported pain and mobility following specialist HBOT.
These are areas of scientific investigation, rather than established outcomes that can be expected from using a hyperbaric chamber.
What Does Research Say About HBOT for Osteonecrosis?
Clinical research has explored HBOT for osteonecrosis of the femoral head, particularly in the earlier stages of the condition.
Some smaller studies have reported changes in pain scores, mobility and patient-reported symptoms following treatment.
However, these findings need careful interpretation. Improvements observed during a study do not necessarily demonstrate that HBOT caused them, particularly when study designs or comparison groups are limited.
A systematic review and meta-analysis published in 2025 examined research involving HBOT and osteonecrosis of the femoral head. Although some measurements improved within treatment groups, the review did not establish a consistent advantage over comparison treatments and concluded that the evidence was insufficient to regard HBOT as an effective intervention.
Larger, well-designed clinical trials are needed to clarify whether any particular groups of patients could benefit.
How Is Avascular Necrosis Normally Managed?
The management of avascular necrosis depends on factors such as its location, severity and whether the affected bone has begun to collapse.
A specialist may consider approaches such as:
- Monitoring and follow-up imaging.
- Adjustments to activities and weight-bearing.
- Medication for symptom management.
- Physiotherapy or rehabilitation where appropriate.
- Orthopaedic procedures or joint replacement in selected cases.
Any consideration of HBOT should remain separate from these established clinical decisions and be discussed with an appropriately qualified specialist.
Are All Hyperbaric Chambers Suitable for Clinical Applications?
No. Hyperbaric chambers differ in their construction, operating pressure, oxygen delivery systems, certification and intended purpose.
Research into avascular necrosis generally concerns controlled clinical interventions and should not be assumed to apply to home or general-wellbeing chambers.
The inclusion of avascular necrosis on the Origin Oxygen website does not mean that an Origin Oxygen chamber is intended to treat osteonecrosis, reduce pain, improve circulation or prevent joint deterioration.
Frequently Asked Questions
Clinical studies have investigated potential effects on symptoms and joint function. However, the available evidence is inconclusive, and HBOT has not been established as an effective treatment for avascular necrosis.
There is insufficient reliable evidence to conclude that HBOT can reverse existing bone damage or prevent joint collapse.
Yes. Research has examined specialist HBOT in people with osteonecrosis of the femoral head, although further controlled studies are needed.
Home or general-wellbeing chambers should not be assumed to offer the same conditions as clinical HBOT. No therapeutic benefit should be inferred without product-specific evidence and an appropriate intended medical use.
Yes. Avascular necrosis requires appropriate clinical assessment and monitoring. Information about HBOT should not replace specialist advice or an established management plan.
Understanding Your Hyperbaric Chamber Options
Origin Oxygen supplies hyperbaric chambers for a range of settings, with individual models having different technical specifications and documented intended uses.
Our team can provide information about chamber size, pressure capabilities, operation, installation and maintenance.
Medical suitability and the management of avascular necrosis should always be discussed with an appropriately qualified healthcare professional.
Contact Origin Oxygen to learn more about our equipment range and the practical differences between available chamber types.
Medical disclaimer: This page provides general educational information and does not claim that Origin Oxygen chambers diagnose, treat, cure or prevent avascular necrosis or any other medical condition.
Clinical references
2025 systematic review and meta-analysis — https://pubmed.ncbi.nlm.nih.gov/40591670/