How Hyperbaric Oxygen Heals Chronic Wounds

A wound that has stayed open for weeks can become more than a skin problem. It can limit mobility, increase infection risk, disrupt sleep, and create ongoing stress for patients and caregivers. Understanding how hyperbaric oxygen heals can help families and referring providers recognize when this advanced therapy may be a valuable part of a coordinated wound treatment plan.

Hyperbaric oxygen therapy, often called HBOT, places a patient in a pressurized chamber while they breathe 100% oxygen. The higher pressure allows substantially more oxygen to dissolve into the bloodstream and reach tissues that may not be receiving enough oxygen through normal circulation. For selected chronic wounds, that added oxygen can support the body’s ability to repair damaged tissue.

How Hyperbaric Oxygen Heals Damaged Tissue

Healing requires oxygen. Your body uses it to build new blood vessels, produce collagen, fight certain infections, and create healthy tissue over a wound. When circulation is impaired by diabetes, vascular disease, swelling, radiation injury, or severe infection, the wound bed may not receive enough oxygen to progress through normal healing.

During HBOT, the increased atmospheric pressure helps oxygen move beyond red blood cells and dissolve directly into plasma, the liquid portion of blood. This oxygen-rich plasma can travel into swollen, inflamed, or poorly perfused areas where red blood cells may have difficulty delivering enough oxygen.

The treatment does not close a wound by itself. Instead, it improves conditions inside the wound that make healing more likely when paired with appropriate debridement, infection management, pressure relief, dressings, blood sugar control, and vascular care. This is why hyperbaric oxygen is usually one part of a personalized care plan, not a replacement for essential wound treatment.

Supporting New Blood Vessel Growth

Long-standing wounds often have poor circulation at the edges and base of the wound. HBOT can stimulate the formation of new small blood vessels, a process called angiogenesis. These vessels improve longer-term oxygen and nutrient delivery to damaged tissue.

That process takes time. A patient may need a prescribed series of treatments before the clinical team sees meaningful progress. Wound measurements, tissue appearance, drainage, pain, signs of infection, and overall health all help determine whether the treatment plan is working.

Helping the Body Control Infection

Oxygen is also a key resource for white blood cells, which use it to destroy many types of bacteria. In poorly oxygenated tissue, the body’s natural infection-fighting response can be less effective. Higher oxygen levels may strengthen this response and may also improve the effectiveness of certain antibiotics.

HBOT can be especially important in carefully selected cases involving serious diabetic foot infections or infections that threaten tissue and bone. It is not a substitute for antibiotics, surgical drainage, debridement, or urgent hospital care when those services are needed. A rapidly spreading infection, fever, confusion, severe pain, or blackened tissue requires immediate medical evaluation.

Reducing Swelling and Supporting Tissue Repair

Swelling can further restrict blood flow around a wound. Hyperbaric oxygen therapy may help reduce swelling in some conditions while maintaining high oxygen delivery to injured tissue. Better oxygenation supports collagen production, which provides structure for new skin and soft tissue.

For patients with difficult wounds, this can mean a healthier wound bed, stronger granulation tissue, and a better opportunity for the wound to move forward after it has stalled. Progress still depends on protecting the wound from repeat pressure, trauma, moisture damage, or uncontrolled swelling.

Which Wounds May Benefit From Hyperbaric Oxygen Therapy?

HBOT is not appropriate for every open wound. It is generally reserved for specific, medically necessary conditions that have not improved adequately with standard care or that carry a high risk of limb loss, severe infection, or tissue breakdown.

A hyperbaric evaluation may be considered for certain diabetic foot ulcers, particularly when there is deep tissue involvement and poor healing despite comprehensive treatment. It may also be used for selected chronic bone infections, compromised skin grafts or flaps, radiation-related tissue injury, crush injuries, and sudden loss of blood flow to tissue. Coverage and eligibility depend on the diagnosis, documentation, clinical findings, and individual insurance requirements.

Venous leg ulcers, pressure injuries, and post-surgical wounds can be complex and may require advanced treatment, but HBOT is not automatically the right answer for each one. Some patients need compression therapy, offloading, vascular intervention, specialized dressings, debridement, biologic grafts, or better nutrition before hyperbaric treatment is considered. The right therapy depends on why the wound is not healing.

What a Hyperbaric Treatment Visit Is Like

Before treatment begins, a clinical team reviews the patient’s wound history, medications, medical conditions, circulation status, and ability to safely tolerate pressurization. The team may examine the ears, lungs, and blood sugar levels, especially for patients with diabetes.

During a typical treatment, the patient rests comfortably in a hyperbaric chamber and breathes oxygen according to the prescribed protocol. The chamber is gradually pressurized. Many patients notice a feeling of fullness in the ears, similar to flying in an airplane, and are coached on ways to equalize pressure.

Sessions commonly last about two hours from start to finish, though protocols vary. Treatment frequency and total number of sessions depend on the diagnosis and response to care. Patients should expect ongoing wound assessments throughout the course of therapy rather than assuming the same schedule fits every condition.

Safety Matters: Who Needs Extra Evaluation?

Hyperbaric oxygen therapy has an established safety record when delivered under appropriate medical supervision, but it is still a medical treatment. The most common concerns involve ear or sinus pressure discomfort. Some patients may experience temporary vision changes after multiple sessions, and blood sugar can shift during treatment for people using diabetes medications.

Certain lung conditions, untreated pneumothorax, active respiratory symptoms, seizure disorders, or medications may require additional evaluation or may affect whether HBOT can be used safely. Patients should provide a complete medication list and medical history. The care team can then coordinate with the patient’s primary physician, specialists, family, and facility staff as needed.

Hyperbaric Oxygen Works Best With Complete Wound Care

The most effective wound plans address the entire cause of the wound. For a diabetic foot ulcer, that may include glucose management, infection control, pressure offloading, circulation testing, regular debridement, and protective dressings. For a pressure injury, the plan may focus on repositioning, support surfaces, moisture management, nutrition, and reducing friction or shear.

Advanced therapy only helps when the wound is protected between visits. Caregivers and facility teams play a central role by following dressing instructions, monitoring for changes, keeping scheduled appointments, and reporting increased drainage, odor, redness, pain, fever, or new skin breakdown promptly.

At Wound Care Center of Palm Beach, hyperbaric oxygen therapy can be coordinated within a broader physician-led approach to chronic and complex wounds. The goal is not simply to apply a technology. It is to identify barriers to healing and bring the right level of expert wound care to patients who need timely support.

If a wound has stopped improving, has become infected, or is putting mobility and independence at risk, do not wait for it to worsen. A specialized wound evaluation can clarify whether hyperbaric oxygen therapy or another advanced treatment may help move recovery forward.