KEY TAKEAWAYS
Hyperbaric oxygen therapy wound healing works by dramatically increasing the amount of oxygen delivered to tissues. That can help chronic foot ulcers, particularly in patients with diabetes or vascular disease, break through healing stalls that dressings alone cannot address. Not every patient is a candidate, and HBOT works best as part of a comprehensive chronic foot ulcer treatment plan. An Annapolis foot specialist can help determine whether HBOT is appropriate for your wound and coordinate all components of your care.
A wound dressing does important work: it protects the wound from contamination, maintains a moist environment for healing, absorbs drainage, and in some cases delivers antimicrobials or other agents directly to the wound. For many patients with straightforward wounds, dressings and basic wound care are enough.
For others, particularly those with diabetes, peripheral artery disease, or a history of wounds that chronically fail to close, dressings only manage the surface. The deeper problem of insufficient oxygen delivery to healing tissue unfortunately goes unaddressed. Hyperbaric oxygen therapy (HBOT) is designed to reach that deeper problem.
At Annapolis Foot & Ankle Center, our Chesapeake Amputation Prevention Center houses an on-site HBOT chamber, which is one of the features that sets our advanced foot wound treatment program apart. Dr. Eric Harmelin is certified in hyperbaric medicine and has extensive experience integrating HBOT into comprehensive wound care plans for patients at real risk of limb loss.
What Hyperbaric Oxygen Therapy Actually Does
During an HBOT session, the patient rests inside a pressurized chamber filled with 100 percent pure oxygen. At normal atmospheric pressure, oxygen travels through the blood primarily bound to hemoglobin. At the elevated pressures used in HBOT. which is typically two to three times normal atmospheric pressure, oxygen dissolves directly into the plasma, cerebrospinal fluid, and other body fluids. This allows oxygen to reach tissues with compromised circulation that hemoglobin-bound oxygen cannot adequately supply.
Sessions typically last 90 to 120 minutes, and a full course of treatment may involve 20 to 40 sessions delivered five days a week, depending on the wound, the patient's overall health, and how the wound is responding. Treatment is outpatient, and most patients tolerate it well, though some experience mild ear discomfort from the pressure changes similar to what you might feel in an airplane.
In a foot ulcer context, the oxygen increase from HBOT therapy does several things:
- Supports the white blood cells that fight bacteria
- Promotes new blood vessel formation
- Enhances fibroblast activity to produce collagen
- Reduces the size of microbial populations that thrive in low-oxygen environments
The result, in appropriate candidates, is a wound environment that is better equipped to heal.
Why Basic Wound Dressings Sometimes Aren't Enough
Standard wound dressings—whether basic gauze, foam, hydrocolloid, or silver-impregnated dressings—create a favorable surface environment for healing. They cannot, however, increase the amount of oxygen reaching the wound bed through the bloodstream. For patients with conditions that fundamentally restrict that blood-oxygen delivery, surface-level interventions will always have a ceiling.
Common reasons a wound stalls despite good dressing care include poor circulation related to peripheral artery disease, microvascular damage from long-term diabetes, and persistent low-grade infection in tissue that cannot mount a full immune response. Wound depth that extends into structures dressings cannot reach and wound edges that have stopped migrating inward (epithelial stall) may also be addressed with HBOT.
In these situations, adding a more powerful intervention that addresses the oxygen deficiency at the tissue level can make the difference between a wound that eventually closes and one that leads to amputation.
Who May Benefit From Hyperbaric Oxygen Therapy for a Chronic Foot Ulcer?
HBOT is not appropriate for every patient with a non-healing ulcer, and candidacy requires a formal evaluation. Patients most likely to benefit include those with:
- Wagner grade 3 or higher diabetic foot ulcers that have not responded to standard care over four weeks or more
- Documented tissue hypoxia confirmed through transcutaneous oxygen measurement (TcPO2) or similar testing
- Compromised but not absent circulation, because severely ischemic limbs with no perfusion may require vascular intervention before HBOT becomes useful
- Wounds associated with radiation injury, osteomyelitis (bone infection), or necrotizing soft tissue infection in certain clinical scenarios
Your podiatrist will conduct a comprehensive pre-treatment evaluation to confirm that HBOT is both safe and likely to be beneficial for your specific foot ulcer healing plan.
HBOT as Part of a Larger Chronic Foot Ulcer Treatment Plan
It would be a mistake to view hyperbaric oxygen therapy as a standalone treatment for chronic foot ulcers. The evidence supports HBOT most strongly when it is integrated into a multidisciplinary wound care program. At Annapolis Foot & Ankle Center, that means HBOT is combined with:
- Regular foot wound care visits for debridement, wound measurement, and dressing management
- Offloading protocols appropriate to the wound location and the patient's mobility
- Infection management, including cultures and targeted antibiotic therapy when indicated
- Vascular assessment to identify and address blood flow limitations
- Blood sugar optimization for patients with diabetes, coordinated with their primary care or endocrinology team
- Consideration of other therapies such as skin substitutes, growth factor applications, or other advanced wound care technologies and treatments when the ulcer warrants them
Patients who approach HBOT as one component of a structured, monitored plan—not as a last resort tried in isolation—tend to have better outcomes than those who pursue it without the surrounding infrastructure of care.